Steel 3d printer for sale

The fixture must be regularly replaced as it wears out. Printing the part with the Studio System eliminates CNC lead time and frees up the machine shop for more critical work.

• Size (mm): 47 x 28 x 15
• Cost to print: $14.00

• Bound Metal Deposition™

Tri Manifold

Manufacturing Alloy 625

This part converges three flow paths into one via internal channels. These channels would be impossible to machine and instead would need to be drilled as straight holes and plugged.

Printing on the Studio System allows these channels to be designed for their function rather than their manufacturing method. This part can be produced in just a few days with very little hands-on work.

• Size (mm): 108 x 101 x 98
• Cost to print: ($) 906. 00
• Cost to DMLS ($): 4069.28
• Savings vs. machining: 77.74%

Bound Metal Deposition™

Generative Piston Head

Generative Design, Prototyping 4140

Prototype piston head for a reciprocating engine, optimized with generative design. Typically CNC machined from aluminum alloy, pistons can be time-consuming and difficult to rapidly prototype and test.

It often takes months or even years to move from design to production. With the Studio System, various piston designs can be easily prototyped and tested—speeding up product development timelines, reducing time to market, and introducing new opportunities for optimization, including generative design—all while avoiding CNC backlog and lead times.

• Size (mm): 105 x 105 x 54
• Cost to print ($): 271. 00
• Cost to machine ($): 568.13
• Savings vs. machining: 52.30%

Bound Metal Deposition™

YE6 Burner Tip

Tooling and Machinery 316L Stainless Steel

This burner tip was originally cast in the 1950s. With the Studio System, the company was able to recreate the part with properties similar to the original cast part, with no tooling cost or long lead times.

The quote for new tooling is usually in the tens of thousands of dollars. Thus, Studio System 2, a printer that was designed from the ground up for simple installation and use, allows for significant cost savings, especially when it comes to manufacturing obsolete parts at low costs and without compromising part quality.

• Size (mm): 139 x 139 x 86
• Cost to print ($): 193.46
• Cost to machine: ($) 694. 00
• Cost reduction: 72.00%

Bound Metal Deposition™

Helical Heat Exchanger

Manufacturing Copper

This heat exchanger enables a much higher heat transfer rate than a traditionally manufactured part. Used in chemical processing to cool a hot gas as it flows through a pipe.

The Studio System allows for the complex geometry of the heat exchanger to easily be printed as a single component. It would not be manufacturable as one component via CNC machining due to its thin external fins and a complex, internal helical cooling channel.

• Size (mm): 78 x 64 x 58
• Cost to print ($): 443.00
• Cost to machine ($): 2138.00
• Cost reduction: 79.28%

Bound Metal Deposition™

Zipper Mold

Material: h23 Tool Steel

This part is an injection mold insert for manufacturing zinc zippers.

The 3D printing of the mold inserts shortens production run lead time and allows rapid iteration and refinement of zipper designs. Using a high-resolution printhead allows for smaller parts with finer features, requiring less post-processing.

Size (mm): 46 x 27 x 18
Cost to print ($): 16.00

Bound Metal Deposition (BMD)™

Best metal 3D printers in 2023: comprehensive overview

What is the best metal 3D printer in 2023?

Over the past few years, there has been a surge in both supply and demand for metal 3D printers.

Manufacturers are launching metal additive manufacturing machines that are faster, easier to use, and more powerful with an increasing number of compatible metals.

Many businesses are adopting these 3D metal printing technologies to produce cost-effective metal parts and prototypes, benefiting as well from increased freedom of design linked to additive manufacturing. They are suitable for a variety of industries such as aerospace, automotive, health, engineering, and more.

Although metal 3D printer prices have been slowly and slightly decreasing, these machines are still relatively expensive acquisitions, mostly ranging from $80K to almost $1M.

With our metal 3D printer selection, we aim to provide a comprehensive overview of what’s available from well-established and distributed brands, at various price points, and with different metal 3D printing technologies.

The best metal 3D printers in 2023

Brand	Product	Build size	Country	Price Approximate starting prices based on supplier-provided information and public data. Prices may vary by region, over time and do not include additional products or services (taxes, shipping, accessories, training, installation, …).
Markforged	Metal X (Gen 2)	300 × 220 × 180 mm11. 81 × 8.66 × 7.09 in	United States	$ 99,500125 000 €82,476 £13,409,416 ¥	Quote
Xact Metal	XM200C	127 × 127 × 127 mm5 × 5 × 5 in	United States	$ 110,000100 000 €91,179 £14,824,480 ¥	Quote
Pollen AM	Pam Series MC	⌀ 300 x 300 mm	–	$ 140,000135 000 €116,046 £18,867,520 ¥	Quote
TRUMPF	TruPrint 1000	100 × 100 × 100 mm3.94 × 3.94 × 3.94 in	–	$ 170,000170 000 €140,913 £22,910,560 ¥	Quote
3D Systems This brand is a certified partner from our network.	DMP Flex 100	100 × 100 × 80 mm3.94 × 3.94 × 3.15 in	–	$ 245,000245 000 €203,081 £33,018,160 ¥	Quote
EOS	EOS M 100	100 × 100 × 95 mm3.94 × 3.94 × 3.74 in	Germany	$ 350,000350 000 €290,115 £47,168,800 ¥	Quote
XJet	Carmel 700M	501 × 140 × 200 mm19. 72 × 5.51 × 7.87 in	–	$ 599,000599 000 €496,512 £80,726,032 ¥	Quote
Desktop Metal	Production System P-1	200 × 100 × 40 mm7.87 × 3.94 × 1.57 in	United States	upon request	Quote
Desktop Metal	Studio 2	300 × 200 × 200 mm11.81 × 7.87 × 7.87 in	United States	upon request	Quote
Digital Metal	DM P2500	203 × 180 × 69 mm7.99 × 7.09 × 2.72 in	Sweden	upon request	Quote
Formalloy	L-Series	1000 × 1000 × 1000 mm39.37 × 39.37 × 39.37 in	United States	upon request	Quote
GE Additive	Arcam EBM Spectra L	⌀ 350 x 430 mm	United States	upon request	Quote
GE Additive	M2 Series 5	250 × 250 × 350 mm9.84 × 9.84 × 13.78 in	–	upon request	Quote
Renishaw	RenAM 500E	245 × 245 × 335 mm9. 65 × 9.65 × 13.19 in	–	upon request	Quote
SLM Solutions	SLM 125	125 × 125 × 75 mm4.92 × 4.92 × 2.95 in	Germany	upon request	Quote
SPEE3D	LIGHTSPEE3D	300 × 300 × 300 mm11.81 × 11.81 × 11.81 in	–	upon request	Quote
TRIDITIVE	AMCELL	⌀ 300 x 350 mm	Spain	upon request	Quote
Velo3D	Sapphire	⌀ 315 x 1000 mm	–	upon request	Quote

Expand to see more specs

Technology: The technologies listed above are main categories of metal 3D printing technologies. Most manufacturers have their own branded technologies, which fall into the main categories that are listed in the table.

The products in the table are ranked by price (low to high).

Brand	Product	Technology	Build size	Country	Price Approximate starting prices based on supplier-provided information and public data. Prices may vary by region, over time and do not include additional products or services (taxes, shipping, accessories, training, installation, …).
Markforged	Metal X (Gen 2)	FFF	300 × 220 × 180 mm11.81 × 8.66 × 7.09 in	United States	$ 99,500125 000 €82,476 £13,409,416 ¥	Get a quote
Xact Metal	XM200C	Laser beam PBF	127 × 127 × 127 mm5 × 5 × 5 in	United States	$ 110,000100 000 €91,179 £14,824,480 ¥	Get a quote
Pollen AM	Pam Series MC	Material Extrusion	⌀ 300 x 300 mm	–	$ 140,000135 000 €116,046 £18,867,520 ¥	Get a quote
TRUMPF	TruPrint 1000	Laser beam PBF	100 × 100 × 100 mm3.94 × 3.94 × 3.94 in	–	$ 170,000170 000 €140,913 £22,910,560 ¥	Get a quote
3D Systems This brand is a certified partner from our network.	DMP Flex 100	Laser beam PBF	100 × 100 × 80 mm3.94 × 3.94 × 3.15 in	–	$ 245,000245 000 €203,081 £33,018,160 ¥	Get a quote
EOS	EOS M 100	DMLM	100 × 100 × 95 mm3.94 × 3.94 × 3.74 in	Germany	$ 350,000350 000 €290,115 £47,168,800 ¥	Get a quote
XJet	Carmel 700M	Material jetting (thermally-bonded)	501 × 140 × 200 mm19.72 × 5.51 × 7.87 in	–	$ 599,000599 000 €496,512 £80,726,032 ¥	Get a quote
Desktop Metal	Production System P-1	Binder jetting (multi-step)	200 × 100 × 40 mm7.87 × 3.94 × 1.57 in	United States	upon request	Get a quote
Desktop Metal	Studio 2	BMD	300 × 200 × 200 mm11.81 × 7.87 × 7.87 in	United States	upon request	Get a quote
Digital Metal	DM P2500	Binder jetting (multi-step)	203 × 180 × 69 mm7. 99 × 7.09 × 2.72 in	Sweden	upon request	Get a quote
Formalloy	L-Series	Laser beam DED	1000 × 1000 × 1000 mm39.37 × 39.37 × 39.37 in	United States	upon request	Get a quote
GE Additive	Arcam EBM Spectra L	EBM	⌀ 350 x 430 mm	United States	upon request	Get a quote
GE Additive	M2 Series 5	Laser beam PBF	250 × 250 × 350 mm9.84 × 9.84 × 13.78 in	–	upon request	Get a quote
Renishaw	RenAM 500E	Laser beam PBF	245 × 245 × 335 mm9.65 × 9.65 × 13.19 in	–	upon request	Get a quote
SLM Solutions	SLM 125	Laser beam PBF	125 × 125 × 75 mm4.92 × 4.92 × 2.95 in	Germany	upon request	Get a quote
SPEE3D	LIGHTSPEE3D	Material jetting (thermally-bonded)	300 × 300 × 300 mm11. 81 × 11.81 × 11.81 in	–	upon request	Get a quote
TRIDITIVE	AMCELL	FFF	⌀ 300 x 350 mm	Spain	upon request	Get a quote
Velo3D	Sapphire	Laser beam PBF	⌀ 315 x 1000 mm	–	upon request	Get a quote

Main types of metal 3D printing technologies

The four main types of 3D metal printing technologies are:

• Metal Powder Bed Fusion 3D printing (SLS, SLM, DMP)
• Directed Energy Deposition (DED)
• Metal filament extrusion (FFF, FDM)
• Material Jetting and Binder Jetting

There are also some resin-based metal 3D printers, and metal sheet lamination 3D printers, but they are harder to come by.

It is not uncommon to see different acronyms and names for similar technologies. Each brand markets their own, proprietary methods. Some metal 3D printer companies even use a mix of different technologies.

Here we provide a deeper look into each 3D metal printer from our list. They are grouped together according to their main 3D printing technology type (powder bed fusion, material/binder jetting, extrusion, and DED).

Extrusion-based metal 3D printer selection (FFF, FDM)

Extrusion consists of heating the material (filament) and pushing it through a nozzle. In the metal 3D printing case, the filament is generally made up of metal particles mixed into a binding agent.

After the part is 3D printed, the result is a raw object or part; it must go through several post-processing steps– such as debinding and sintering– to attain its final form.

Most extrusion-based metal 3D printing processes include these steps. The above illustration is sourced from Desktop Metal (Bound Metal Deposition™ process).

Desktop Metal’s Studio is an office-friendly, end-to-end metal 3D printing system. Aside from the printer, the Studio line also includes a debinding machine and a furnace for sintering. Indeed, parts 3D printed with this Desktop Metal 3D printer are “green”.

The Studio printer, with its proprietary Bound Metal Deposition technology, uses filament that is filled with small, metal rods. During debinding, the binding material (wax and polymer binders) is dissolved thanks to a proprietary liquid substance. The part is left porous, and must go in the furnace for its particles to fuse and densify the part.

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MarkForged is specialized in continuous fiber 3D printing, but also offers metal 3D printing with their Metal X system, featuring Atomic Diffusion Additive Manufacturing (ADAM) technology.

This MarkForged 3D printer extrudes metal-filled plastic filament to form the part, which must then be washed with a special debinding fluid (Wash-1 Station) and then sintered in a furnace (Sinter-1 or Sinter-2 MarkForged machines).

Available metal 3D printer filament includes various Steels (h23, A2, D2 tool steels, 316L stainless steel) as well as Inconel, Copper, and Titanium.

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Canada-based Rapidia offers an interesting and unique way to 3D print metal. They use a water-based metal paste, which eliminates the need for chemical debinding. The water evaporates during the 3D printing process, so the part only needs to go through the furnace in order to completely solidify and attain its final form.

Confirmed, available paste types include several Stainless Steels, Inconel, and a few ceramics. Copper, Tungsten Chrome Carbide, Titanium, and various other metals are in development.

The ExOne Metal Designlab, designed in collaboration with Rapidia, works on the same basis.

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Pollen AM is a French manufacturer that has been producing pellet 3D printers since 2013. Their Pam Series MC is a delta-style 3D printer (cylindrical build volume) that can print metals, ceramics, and thermoplastics.

It extrudes injection-molding-grade pellets instead of metal 3D printer filament, driving material costs down significantly. Pollen AM names their technology “Pellet Additive Manufacturing”.

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This machine was built with one goal: enable mass production 3D printing of metal parts 24/7. The AMCELL is fully automated, with auto feedstock control, environment control (temperatures, humidity, air filtering), and an ejection system fitted with a conveyor belt.

Rather than providing one, big build volume, the TRIDITIVE AMCELL boasts eight delta-style ø 220 x 330 mm build areas. Its eight “robots” deposit metal-infused filament to create 3D metal parts. TRIDITIVE states that resulting parts are similar to ones produced with traditional MIM (Metal Injection Molding) methods.

TRIDITIVE’s technology is called Automated Multimaterial Deposition®.

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Metal powder bed fusion 3D printer selection (SLS, SLM, DMP, and more)

At the moment, the most commonly used metal additive manufacturing technology is powder bed fusion 3D printing. Simply put, the 3D printer creates objects out of a bed of powdered metal by using a powerful laser.

3D Systems, a historical actor on many 3D printing fronts, presents the DMP FLEX 100 as a fast, precise, and affordable metal 3D printer. It offers impressive part repeatability and surface finishes, of around 20 μm and 5 Ra μm respectively. DMP stands for Direct Metal Printing.

The printer comes with 3D Systems’ software 3DXpert All-in-One Software Solution for Metal Additive manufacturing. Their LaserForm metal 3D powders are certified.

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This compact metal 3D printer is destined for the production of small parts in small quantities. Its material portfolio is especially interesting for medical use cases, namely dental crowns and bridges. EOS certified metal powders include Cobalt-Chrome, Stainless Steel, and Titanium.

The EOS M100’s laser spot is precise enough to provide a great level of detail, backed by 200 W of powder.

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Originally a Swedish company, Arcam was acquired by GE Additive a few years ago. The Arcam EBM Spectra L is up to 20% faster than its predecessors and is able to reduce part costs by around 10%.

This metal 3D printer is dedicated to Titanium 3D printing, but Copper is in the pipeline as well. Its laser beam power is equal to 4.5 kW, partly explaining the printer’s high melting capacity and productivity. Common applications for this printer include orthopedic implants and parts for the aerospace industry.

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Concept Laser is the company behind GE Additive’s M2 Series 5. It offers an easy, optimized workflow, with a separate processing chamber and handling area that is integrated into the system. This closed-loop material system ensures a safe environment that is free of powder for the operator.

The M2 metal additive manufacturing solution is compatible with a range of metals, from Stainless Steels to Aluminum, Nickel, Titanium, and Cobalt-Chrome.

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The RenAM 500E is Renishaw’s entry-level metal additive manufacturing solution. It offers a relatively large build volume and powder can be handled via a dedicated glove box to avoid powder from getting free.

This system is also equipped with an oxygen sensor and a proprietary emission-filtering system branded SafeChange™.

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Officially established in 2006, SLM Solutions has been a historical player in the powder bed fusion industry for many years. The SLM 125 boasts an open software architecture that allows users to tweak the system’s parameters according to specific use cases, materials, and general needs.

Options such as laser monitoring and melt pool monitoring are available for businesses that require full transparency and control over their production series.

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The TruPrint 1000 is TRUMPF’s most compact metal 3D printing system, with a 100mm-tall cylindrical build volume. It is suitable for the production of small parts and prototypes, and even small production series when equipped with the multilaser option that increases the printer’s speed.

This metal 3D printer can be operated remotely via a tablet application, which also gives access to its onboard camera stream.

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The Velo3D Sapphire is a high-volume metal 3D printer from the US designed for production series. This metal 3D printer features Velo3D’s Intelligent Fusion technology to allow for complex geometries and 0° overhangs.

The system is also equipped with a range of metrology sensors that measure each and every layer that is 3D printed.

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The XM200C is Xact Metal’s entry-level metal 3D printing solution. It is suitable for both research purposes and small production series. The XM200C benefits from a proprietary Xact Core gantry system for precise movements with a fusing speed of up to 500 mm/s.

Xact Metal offers their own materials, branded Xact Powder, including various Stainless Steels, Super Alloys, Tooling Steels, Aluminum, Titanium, Bronze, and Copper. Advanced users are able to use their own metal powders if needed.

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Metal material jetting and binder jetting 3D printers

Material jetting 3D printers are equipped with various inkjet printheads (somewhat similar to 2D printing) that jet material onto a surface. The material then hardens, and another layer of “metal ink” is jetted on top.

Binder jetting is a similar process, but it is a binding agent that is jetted atop a layer of powder.

The Production System by Desktop Metal was designed for mass production. It is advertised by Desktop Metal as being a fast, cost-effective metal additive manufacturing solution, with a cost per part up to 20 times lower than with other metal 3D printing systems.

This Desktop Metal 3D printer is equipped with over 16,000 nozzles that are mounted onto a “print bar” that recoats the build plate with powder at the same time, hence explaining the technology’s name: Single Pass Jetting™.

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Digital Metal, a Höganäs Group company, creates incredibly detailed metal parts with their DM P2500 system. It is able to print 3D metal parts with an accuracy as high as 0.001mm (1µ), and with a medical-grade surface quality of around 0.006mm (6µ).

Another interesting feat to point out is that almost 100% of leftover powder can be recycled for future prints. This metal AM machine is able to churn out serial production series efficiently and reliably; one of the company’s first DM P2500 printers has been running 24/7 since 2013, according to Digital Metal.

The Digital Metal DM P2500 is a certified metal 3D printer (CE and UL) that is compatible with certified metal materials (ISO 22068).

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Australian manufacturer SPEE3D has developed an impressively fast metal 3D printing technology called Supersonic Deposition. The technology is based on metal cold spray, using compressed air to “jet” metal powder through a nozzle at high speeds.

This enables the LightSPEE3D to 3D print at up to 100 grams per minute and with a range of metals including copper.

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XJet developed an impressive, proprietary jetting technology they call NanoParticle Jetting™. This inkjet method disperses millions of tiny droplets that contain nanoparticles of solid metal. The liquid material comes in cartridges that are easy to insert into the printer.

After being printed, the metal parts must go through support removal and sintering processes to attain their final form.

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DED: Directed Energy Deposition metal additive manufacturing systems

Directed Energy Deposition (DED) is comparable to filament extrusion. The metal material is pushed through a special nozzle, like with FFF/FDM, but a powerful laser beam solidifies the material at its deposition point.

Formalloy produces a range of metal DED 3D printers with up to 5 axes of motion. They can be used to produce metal parts but also to repair or clad existing parts.

Different laser wavelengths are available, as well as different build volumes: 200 x 200 x 200 mm, 500 x 500 x 500 mm, and 1000 x 1000 x 1000 mm. Metal 3D printers from Formalloy can be customized depending on company requirements.

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Alternative metal 3D printers and special mentions

Hybrid metal manufacturing systems

Some manufacturers are specialized in hybrid metal manufacturing systems. They combine both subtractive and additive manufacturing methods, often with robotic arms that are able to move on more than three axes.

Some of the biggest actors on the hybrid metal AM system market are:

• Gefertec (Germany)
• DMG Mori (Germany)
• Matsuura (Japan)
• Sodick (United States)

XXL-sized metal 3D printers for industrial production

For those that require very large metal parts, there are several huge, industrial machines that offer gigantic build volumes for industrial production. To name a few:

• Sciaky EBAM 300
• Titomic TKF1000
• ADC Aeroswift
• ADIRA AddCreator
• Fabrisonic SonicLayer 4000
• ExOne X1 160PRO
• InssTek MX-600
• BeAM Modulo 400
• Optomec Lens CS 600
• Additive Industries MetalFAB1

Metal 3D printers from China

There has recently been a lot of growth in the metal 3D printer market in Asia, and more specifically in China. Some Chinese brands have been upping their game in that respect, providing industrial-grade metal 3D printing options:

• Farsoon
• ZRapid Tech
• Shining 3D
• Wiiboox

However, we feel that they are not yet playing in the same league as the 3D printers from our main selection, mostly due to a lack of distribution networks, after-sales service and training, and other factors which tend to matter when considering them together as a whole.

R&D metal 3D printers for labs

In certain cases, metal 3D printers are used for research purposes to develop and test new materials. There are a few machines that are specifically designed for this:

• Open Additive PANDA-6”
• Freemelt ONE
• Sharebot metalONE

Pros and cons of metal 3D additive manufacturing

Benefits of 3D printing metal parts

• On-demand production: Metal additive manufacturing offers more flexibility and control over the production line.

• Complex designs made possible: With 3D printing technology, it is possible to create highly detailed and intricate parts that would have to be broken down into several pieces with traditional methods.

• Waste reduction: Compared to CNC milling, for example, metal AM produces much less waste as it only consumes the material needed for a certain part. This is more true for extrusion-based methods than it is for powder-based methods, where it isn’t always possible to re-use 100% of unsintered or unbinded material.

• Lighter parts: Whereas metal parts are usually completely solid infill-wise with other methods, 3D printing allows parts to be more or less hollow without undermining their strength and resistance.

• Cost-effectiveness: All the above benefits of metal 3D printing can inherently reduce costs per part, although high metal 3D printer prices do represent a significant entry barrier. Reaching a positive return on investment can take a while depending on your throughput.

Limits of metal 3D printing

• Metal 3D printing prices: Metal AM systems are still quite expensive, as are metal powders and metal filaments. There are hidden costs, too (e.g. energy consumption, learning curve, etc.).

• Environmental constraints and safety precautions: Most metal 3D printers have a large footprint and require specific operating environments with controlled temperatures, hygrometry, and more.

• Post-processing: In many cases it is necessary for parts to be post-processed, whether it’s debinding and sintering or finishing touches for surface quality.

• Physical properties: It can be difficult to achieve the same physical properties that traditionally manufactured metal parts have. There are a number of factors (e.g. anisotropy) to take into account during the design process and file preparation before even trying to 3D print a certain part.

Metal 3D printing materials

Which metals can you 3D print?

A growing number of metals and metal alloys can be 3D printed. These are the main ones:

• Aluminum
• Titanium
• Nickel, Inconel
• Copper
• Bronze
• Cobalt, Cobalt-Chrome
• Steels (tooling, maraging, stainless)
• Precious metals (gold, silver, platinum)

Which metal 3D printing material formats are available?

Metal 3D printing material can be found in various formats, catering to different metal 3D printing methods. The most common are:

• Powder
• Wire
• Filament

It is also possible to find metal 3D printing resin as well as metal sheets for lamination-based 3D printers.

Metal 3D printer price: how much does a metal 3D printer cost?

Industrial metal 3D printer prices generally range from about $30,000 to over one million dollars for the most premium, industrial-grade metal additive manufacturing systems.

Additional costs to consider are the materials for metal 3D printing, which can cost a few hundred USD/kg, as well as costs linked to post-processing (tools, time, etc.).

Applications for metal AM systems

There are thousands of possibilities and use cases for metal 3D printing in a wide range of industries. A few industries have been incrementally using metal AM:

• Aerospace
• Automotive
• Medical

Whether it’s for tooling, replacement parts, or final products, many businesses can benefit from metal 3D printing.

However, metal additive manufacturing isn’t necessarily beneficial for every single metal part. Although some metal 3D printing systems have a relative capacity for serial production, it is generally cheaper to keep using traditional methods for simple parts.

For cases where complex geometries, rapid prototyping, and mass customization are required, metal AM is convenient and efficient.

Metal 3D printing services: order 3D metal parts online

For professionals with limited office space and human resources, low budgets, and/or few needs of custom parts and prototypes, metal 3D printing services can be an ideal solution.

These additive manufacturing service companies own a variety of high-quality 3D printers with different technologies, and their professionals are experts in 3D printing. It is possible to order metal 3D parts on-demand, without acquiring a 3D printer or having to buy a certain material for one-time use.

Here are some of the most trusted 3D printing service providers that offer metal printing services:

• Sculpteo
• Shapeways
• Hubs (ex 3D Hubs)
• Stratasys
• i.materialise
• Protolabs

Metal 3D printing technologies and acronyms

Many manufacturers develop proprietary variations of existing technologies and label them their own registered names:

• Powder Bed Fusion (PBF): DMLS (Direct Metal Laser Sintering), DMP (Direct Metal Printing), LaserCUSING, LBM (Laser Beam Melting), LMF (Laser Metal Fusion), SLS (Selective Laser Sintering), SLM (Selective Laser Melting)
• Directed Energy Deposition (DED): DMT (Direct Metal Tooling), EBAM (Electron Beam Additive Manufacturing), EBM (Electron Beam Melting), LENS (Laser Engineered Net Shaping), LMD (Laser Metal Deposition)
• Metal Material Jetting (MJ) or Binder Jetting (BJ): Magnet-o-Jet, Nanoparticle Jetting, SPJ (Single Pass Jetting), Metal Jet
• Metal filament extrusion/Fused Filament Fabrication (FFF): ADAM (Atomic Diffusion Additive Manufacturing), CEM (Composite Extrusion Modeling), FDM (Fused Deposition Modeling), FFD (Fused Feedstock Deposition), FMP (Filament Metal Printing), BMD (Bound Metal Deposition), MIM (Metal Injection Molding)
• Lamination: SL (Sheet Lamination), UAM (Ultrasonic Additive Manufacturing)
• Metal resin 3D printing: DLP (Digital Light Processing), FluidFM, SLA (Stereolithography)

Metal 3D printing FAQ

Is 3D printed metal strong?

Metal 3D printed parts can be as strong (or even stronger) as metal parts created with traditional manufacturing processes such as casting. The part’s strength will, however, depend on the metal AM method used and the conditions in which it is 3D printed.

When was 3D metal printing invented?

Metal 3D printing became possible in the 1990s with the development of Selective Laser Melting technology. However, 3D metal printing only started to gain traction and public interest from around 2010 onwards.

How does metal 3D printing work?

There are several ways to 3D print metal. Layers of metal filament can be deposited one after the other, producing a green part that must later go through debinding and sintering steps. It is also possible to fuse metal powder particles together with a laser, or with an inkjet printhead that deposits drops of binding material onto the powder.

How metal 3D printers work. Overview of SLM and DMLS technologies. additive manufacturing. 3D metal printing.

Metal 3D printing. Additive technologies.

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BLT metal 3D printer catalog

Selective laser melting ( SLM ) and direct metal laser sintering ( DMLS ) are two additive manufacturing processes that belong to the family of 3D printing using the powder layer method. The two technologies have much in common: they both use a laser to selectively melt (or melt) metal powder particles, bonding them together and creating a pattern layer by layer. In addition, the materials used in both processes are metals in granular form.

The differences between SLM and DMLS come down to the basics of the particle bonding process: SLM uses metal powders with a single melting point and completely melts the particles, while in DMLS the powder consists of materials with variable melting points.

Specifically:
SLM produces single metal parts while DMLS produces metal alloy parts.
Both SLM and DMLS technologies are used in industry to create final engineering products. In this article, we will use the term "metal 3D printing" to summarize the 2 technologies. We will also describe the main mechanisms of the manufacturing process that are necessary for engineers to understand the advantages and disadvantages of these technologies.
There are other manufacturing processes for producing dense metal parts, such as electron beam melting (EBM) and ultrasonic additive manufacturing (UAM). Their availability and distribution is rather limited, so they will not be presented in this article.

How does metal 3D printing work? The basic manufacturing process for SLM and DMLS is very similar.

1. The printing chamber is first filled with an inert gas (such as argon) to minimize the oxidation of the metal powder. It then heats up to the optimum operating temperature.
2. A layer of powder is spread over the platform, a powerful laser makes passes along a predetermined path in the program, fusing the metal particles together and creating the next layer.
3. When the sintering process is completed, the platform moves down 1 layer. Next, another thin layer of metal powder is applied. The process is repeated until the entire model is printed.

When the printing process is completed, the metal powder already has strong bonds in the structure. Unlike the SLS process, parts are attached to the platform via support structures. The support in metal 3D printing is created from the same material as the base part. This condition is necessary to reduce deformations that may occur due to high processing temperatures.
When the 3D printer's chamber cools down to room temperature, excess powder is removed manually, such as with a brush. The parts are then typically heat treated while they are still attached to the platform. This is done to relieve any residual stresses. They can then be further processed. The removal of the part from the platform occurs by means of sawing.

In SLM and DMLS, almost all process parameters are set by the manufacturer. The layer height used in metal 3D printing varies from 20 to 50 microns and depends on the properties of the metal powder (fluidity, particle size distribution, shape, etc.).
The basic size of the print area on metal 3D printers is 200 x 150 x 150 mm, but there are also larger sizes of the working area. Printing accuracy is from 50 - 100 microns. As of 2020, metal 3D printers start at $150,000. For example, our company offers 3D metal printers from BLT.
metal 3D printers can be used for small batch production, but the 3D printing capabilities of such systems are more like those of mass production on FDM or SLA machines.
The metal powder in SLM and DMLS is recyclable: typically less than 5% is consumed. After each impression, the unused powder is collected and sieved, and then topped up with fresh material to the level required for the next production.
Waste in metal printing, are supports (support structures, without which it will not be possible to achieve a successful result). With too much support on the manufactured parts, the cost of the entire production will increase accordingly.

3D metal printing on BLT 3D printers

SLM and DMLS metal parts have almost isotropic mechanical and thermal properties. They are hard and have very little internal porosity (less than 0.2% in 3D printed condition and virtually non-existent after processing).
Metal printed parts have higher strength and hardness and are often more flexible than traditionally made parts. However, such metal becomes “tired” faster.

Support structures are always required when printing with metal, due to the very high processing temperatures. They are usually built using a lattice pattern.

Supports in metal 3D printing perform 3 functions:

• They form the basis for creating the first layer of the part.
• They secure the part to the platform and prevent it from deforming.
• They act as a heat sink, removing heat from the model.

Parts are often oriented at an angle. However, this will increase the amount of support required, the printing time, and ultimately the overall cost.
Deformation can also be minimized with laser sintering templates. This strategy prevents the accumulation of residual stresses in any particular direction and adds a characteristic surface texture to the part.

Since the cost of metal printing is very high, software simulations are often used to predict how a part will behave during processing. These topology optimization algorithms are otherwise used not only to increase mechanical performance and create lightweight parts, but also to minimize the need for supports and the likelihood of part distortion.

An example of printing on a BLT 3D printer

Unlike polymer powder melt processes such as SLS, large hollow sections are not typically used in metal printing as the support would be very difficult to remove, if at all possible.
For internal channels larger than Ø 8 mm, it is recommended to use diamond or teardrop cross-sections instead of round ones, as they do not require support. More detailed recommendations on the design of SLM and DMLS can be found in other articles on this topic.

As an alternative to hollow sections, parts can be made with sheath and cores, which in turn are machined using different laser power and pass speeds, resulting in different material properties. The use of sheath and cores is very useful when making parts with a large solid section, as it greatly reduces printing time and reduces the chance of warping.

The use of a lattice structure is a common strategy in metal 3D printing to reduce part weight. Topology optimization algorithms can also help design organic lightweight shapes.

SLM and DMLS technologies can produce parts from a wide range of metals and metal alloys, including aluminum, stainless steel, titanium, cobalt, chromium and inconel. These materials meet the needs of most industrial applications, from aerospace to medical applications. Precious metals such as gold, platinum, palladium and silver can also be processed, but their use is of a minor nature and is mainly limited to jewelry making.

The cost of metal powder is very high. For example, a kilogram of 316 stainless steel powder costs approximately $350-$450. For this reason, minimizing part volume and the need for supports is key to maintaining optimal manufacturing cost.
The main advantage of metal 3D printing is its compatibility with high-strength materials such as nickel or cobalt-chromium superalloys, which are very difficult to machine with traditional methods. Significant cost and time savings can be achieved by using metal 3D printing to create a near-clean shape part. Subsequently, such a part can be processed to a very high surface quality.

Various post methods. treatments are used to improve the mechanical properties, accuracy and appearance of metal printed products.
Mandatory post-processing steps include the removal of loose powder and support structures, while heat treatment (heat annealing) is typically used to relieve residual stresses and improve the mechanical properties of the part.

CNC machining can be used for critical features (such as holes or threads). Sandblasting, plating, polishing, and micro-machining can improve the surface quality and fatigue strength of a metal printed part.

Pros:

1. Metal 3D printing can be used to make complex custom parts, with geometries that traditional manufacturing methods cannot provide.
2. Metal 3D printed parts can be optimized to increase their performance with minimal weight.
3. Metal 3D printed parts have excellent physical properties, metal 3D printers can print a wide range of metals and alloys. Includes difficult-to-machine materials and metal superalloys.

Cons:

1. Manufacturing costs associated with metal 3D printing are high. The cost of consumables is from $ 500 per 1 kg.
2. The size of the working area in metal 3D printers is limited.

• Metal 3D printing is most suitable for complex, one-piece parts that are difficult or very expensive to manufacture using traditional methods, such as CNC.
• Reducing the need for building supports, will significantly reduce the cost of printing with metal.
• 3D printed metal parts have excellent mechanical properties and can be made from a wide range of engineering materials, including superalloys.

And that's all we have! We hope the article was useful to you.

Catalog of 3D printers for metal BLT

You can purchase metal 3d printers, as well as any other 3d printers and CNC machines, by contacting us:

• By email: Sales@3dtool. ru

• By phone: 8(800)775-86-69

• Or on our website: http://3dtool.ru

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Metal 3D printing is gaining popularity as an economical manufacturing method

Metal 3D printing using pure steel and alloys makes it possible to obtain strong functional parts of mechanical and industrial products.

Any metal 3D printing technology allows you to print with steel. This is the most popular material. But which steel grades and which technology is best for your application? Will printed steel parts really be as strong and durable as traditionally made parts?

Let's see how a 3D printed steel part is revolutionizing manufacturing and opening doors to new applications in aerospace, medical equipment, automotive, tool making, heavy industry, architecture and more. In addition, more affordable desktop printers are expanding the scope and scope of real steel 3D printed parts.

3D PRINT STEEL

Strength of steel printed parts.

The cast steel part (left) compared to the printed version (center) shows the tolerances possible with the technology. Hinge, right, printed as a whole, no assembly required (Source: Desktop Metal)

The most common question when it comes to a 3D printed metal model is "Will it be as strong as a forged or cast part?". The short answer is yes... and no.

3D printed steel parts can be just as strong, and sometimes more durable, than those made in the traditional way. It depends on many factors such as: end use, type of steel, choice of 3D printing method, post-processing and shape of the part. Also, the comparison depends on which of the strength characteristics you focus on: tensile strength, static load strength, fatigue strength, etc.

Parts printed from steel are used in the aerospace industry, for the needs of the military, and also, for example, for the manufacture of a footbridge, shown below. Therefore, the strength of printed products is beyond doubt, but let's take a closer look.

Queen Maxima of the Netherlands officially opens a 3D printed metal bridge. Photo by Adriaande Groot (Source: MX3D)

A steel part printed on a 3D printer using one of the technologies, in particular laser powder sintering (LPBF), has a finer grain structure than cast metal products. This provides better tensile strength characteristics, but in other respects the cast parts are currently still stronger. Most often, LPBF 3D printing is used to replace cast components, but in some cases, 3D printed components can replace forged parts.

One study showed that, under certain conditions, stainless steel parts made using LPBF 3D printers were three times stronger than parts made from the same steel using the traditional method.

In experiments comparing 3D printed steel parts to traditionally manufactured steel parts, researchers create identical parts using two methods and compare their performance. However, head-to-head comparison of details is only part of the big picture.

The main advantage of printing with steel is not only its strength, but also the unique ability to create internal channels and lattice fillings in details, which is impossible using traditional manufacturing methods. Metal 3D printing makes it possible to produce parts faster than traditional production, since this method does not require the use of special equipment and tools, it allows you to create assemblies as a whole, eliminating the need for subsequent assembly and welding. Designing a printed part usually means that less metal is needed to make it, and therefore less weight, for the same strength.

MX3D Wire Arc Additive Manufacturing (WAAM) printed steel architectural support (Source: MX3D)

3D printing with steel is also a more sustainable and cost-effective practice as it reduces waste. When using subtractive manufacturing methods, such as CNC machining, you make a part by cutting it out of a large one, leaving a lot of waste in the process. With additive manufacturing, you only use the material you need to make the finished product.

Steel 3D printing is not intended to replace traditional methods in all areas, but it can be a better choice for a wide range of applications. Particularly when the required parts are unique and designed for specific applications, such as rocket engines, racing cars or the oil and gas industry. 3D printing is the fastest and most flexible technology for mass production and prototype production. For military and industrial applications, steel 3D printing is a faster and more efficient way to create individual parts for vehicles and machines. Stainless steel 3D printing is rapidly finding applications in medicine to create unique surgical instruments and implants.

If you know what characteristics your final product should have (tensile strength, compressive strength, hardness, density, etc. ), then all these parameters can be incorporated into the product at the production stage.

STEEL FOR 3D PRINTING

Types of steel for 3D printing

Metal powder is the most used metal material for 3D printing (Source: GKN Additive)

There are thousands of different grades of steels and alloys with different mechanical properties used in traditional production, but in 3D printing there are only a few dozen, and some of them are unique, created specifically for this technology. Steel options include:

• Stainless steel (316L, 304L , 17-4PH, 15-5PH, 420, 254, Ph2, GP1, 630, 410)

• Tool steel (D2, M2, h23, h21, MS1, 1.2709)

• Low alloy steel (4140)

• Structural alloyed (20MnCr5)

Recently, unique alloys have been developed specifically for 3D printing, designed to solve the problems that occur when using classical production methods.

For example, 3D printer manufacturer Desktop Metal released a patented stainless steel in 2022 that the company says combines the tensile strength, ductility, and corrosion resistance of 13-8 PH stainless steel with the hardness of low alloy steel. like 4140. The company claims that customers can go to market with parts made of this material and skip the galvanizing step to protect products from corrosion.

ExOne offers two special blends of steel and bronze that the company says allows 3D printed steel parts to have enhanced corrosion resistance while being easy to machine and polish.

While most of the metal powders used in 3D printing are similar to those used for other manufacturing methods, their numbers are on the rise as more companies switch to the technology. Some metal powder manufacturers, such as GKN, also make custom powders for specific 3D printing applications.

HOW TO PRINT STEEL

The strength, properties, and applications of 3D printed steel products largely depend on which 3D printing technology you use. Some methods produce stronger parts, other methods provide better hardness or abrasion resistance, and some technologies are simply very fast.

Below are the main metal 3D printing methods, their properties, and a few of the most common application examples.

Fused Deposition Printing (FDM)

BCN3D's Epsilon printer extrudes stainless steel metal filament (Source: BCN3D)

Fused Deposition Forming (FDM) is a new technology for metal 3D printing, but it is developing rapidly as more printer manufacturers certify metal filaments for use on their printers, e.g. Ultimaker, BCN3D, Makerbot, Raise3D. This method is still much more popular for printing plastics, but with new plastic filaments filled with stainless steel powder, strong metal parts can be produced.

Materials for FDM printing were once limited to thermoplastics. Companies like BASF Forward AM and The Virtual Foundry now offer metal filaments that can be used on almost any FDM printer as long as it has a hardened steel nozzle for abrasive media.

These materials are approximately 80% metal and 20% plastic. After printing, the post-processing process removes the plastic, resulting in 100% metal parts.

Due to the removal of the bonding plastic, FDM metal parts shrink during post-processing. The amount of shrinkage is constant and can be taken into account in CAD systems, which allows to obtain relatively accurate finished parts.

Forward AM's Ultrafuse 316L stainless steel filament produces finished parts with material properties that the company claims are comparable to injection molded metal parts.

(Source: BCN3D)

While 3D printing with metallic materials may not be suitable for applications with tough strength requirements (such as aerospace), the economics of producing simple metal components without critical loads on an affordable FDM printer may outweigh the inability to use them in some applications. .

Ideal use cases for this technology are metal prototype parts and finished parts that will not be subjected to extreme stress.

Desktop Metal's Studio System 3D printer used metal bars joined together and extruded layer by layer to form a metal part (Source: Desktop Metal)

Similar to FDM, metal mesh deposition method (BMD) or bonded powder extrusion (BPE) is an extrusion-based 3D printing process. This method uses bonded metal rods or bonded powdered metal filaments, which consist of a much higher percentage of metal powder than the filaments used in FDM. As with FDM, post-treatment to remove the binder and heat treatment in a final sintering oven are required.

There are only a few 3D printers using this method, such as Desktop Metal, Markforged and more recently 3DGence, but more companies are entering this market, so stay tuned. These printers are valued as a convenient solution for office 3D metal printing, they are more expensive than most FDM printers, but cheaper than the powder-based metal 3D printing technologies described below.

These printers use their own proprietary filament. Desktop Metal and Markforged offer four types of steel.

Ideal niches for using this technology are metal prototype parts, where it is necessary to test the functionality of the part before launching into mass production using traditional methods. Popular applications are moulds, punching dies, nozzles, impellers, fasteners and heat exchangers.

For example, Shukla Medical uses Markforged's Metal X printer to print steel prototypes of its orthopedic implant removal tools.

Laser powder sintering

Powder laser sintering technology uses one or more lasers to melt powdered metal layer by layer into a desired shape (Source: GE Additive)

Powder material laser sintering (LPBF), also known as selective laser sintering (SLM), is the most common type of metal 3D printing and accounts for 80% of all metal 3D printers on the market.

This method uses powerful lasers to selectively sinter metal powder layer by layer.

LPBF 3D printers come in a wide range of sizes, prices and laser powers. These and other characteristics affect the properties of the finished part, print speed and other parameters of the finished products.

Steel and steel alloys are the most popular material for LPBF equipment and, unlike FDM and BMD, metal powders are commercially available as they are most commonly used in traditional manufacturing methods.

LPBF is a technology that maximizes the quality of a 3D printed part. Applications include aerospace components such as monolithic thrust chambers, rocket engine components and heat exchangers, molds, tools and other applications, as well as high wear parts and surgical instruments.

Binder Jetting

Binder 3D printing technology uses metal powder and a binder to form metal parts (Sorrce: ExOne)

Ink jet bonding is another powder printing method in which layers of metal powders are bonded using a liquid binder rather than a laser. During post-processing, the binder is removed.

The application of the binder stands out for its high printing speed compared to other 3D printing methods or traditional manufacturing, and the metal parts made with this technology have material properties equivalent to parts made by metal injection molding.

The number of manufacturers producing metal-bonded inkjet 3D printers is much smaller than that of LPBF machines. Leading manufacturers include ExOne, Desktop Metal, Digital Metal, GE Additive and HP.

Ideal applications for bonded metal blasting are medium to high volume production of metal tools and spare parts.

In fact, HP claims that its Metal Jet 3D printer was designed specifically for mass production of 316L stainless steel products. HP has partnered with Parmatech to produce metal parts for the medical industry. Pennsylvania-based ExOne uses this technology to manufacture hard metal cutting tools and tool steels.

Electron Beam Melting (EBM)

(Source: GE Additive)

Electron beam melting (EBM) is another technology for powder cladding material. It works in a similar way to selective laser melting (SLM), but instead of using a laser as the energy source, it uses a much more powerful beam of charged particles.

The recoater moves the powder onto the printing plate, and the electron beam selectively melts each layer of powder. After each layer is printed, the plate is lowered and another one is applied on top of the previous layer.

EBM can be much faster than SLM, but SLM produces smoother, more accurate pieces. The electron beam is wider than the laser beam, so EBM cannot produce the same precise parts as SLM. Another difference is that the manufacturing process takes place in a vacuum chamber, which reduces the amount of impurities in the material that can lead to defects. That is why EBM is often chosen for printing components for the aerospace, automotive, defense, petrochemical and medical implant industries.

Titanium is the most popular metal for most EBM applications, however steel can be used.

Cold Spray

(Source: Impact Innovations)

Cold spray 3D printing technology is carried out by injecting metal powders through the nozzle of a jet device into a supersonic stream of pressurized gases such as air, nitrogen or helium. The process is called "cold" because the metal particles do not melt, but hit the metal substrate and adhere to its surface during the so-called plastic deformation.

Cold spray printed products are not prone to porosity, thermal cracking and other defects associated with melt-based technologies. This method has several advantages over other production methods. It does not require post-processing and usually leaves a small carbon footprint due to the combination of efficient additive manufacturing and the ability to be used in the right place. For these reasons, this technology is used in the military and aerospace industries worldwide.

For example, the US Army uses cold spray to repair the mounts of a worn Bradley 25mm steel turret gun.

In the automotive industry, cold spray steel is used for crash repairs because high-strength steel substrates in automobiles can be susceptible to thermal repair methods such as welding.

Direct Energy Deposition (DED) and Wire Arc Additive Manufacturing (WAAM)

WAAM steel parts from MX3D (Source: MX3D)

Direct energy deposition (DED) uses welding powder or wire that enters through a nozzle and is fed into a power source to melt the metal. A melt region is created and applied to the substrate. DED is a new process, reminiscent of an old building technology known as "cladding", in which a coating is applied to a substrate, often for thermal insulation or weather resistance. DED is useful for manufacturing large objects as a whole, as well as for complex geometries that require extensive machining - DED can get such parts much closer to a finished state than traditional CNC machining.

Since DED uses a coating process, it can be used to create complex geometries in existing steel parts, thus combining complexity with cost reduction. For example, the French company AddUp advertises a rocket nozzle that uses a preformed large 304 stainless steel hopper cone printed with an isogrid structure, usually made from a larger piece by traditional methods.

A technology related to DED is wire-arc additive manufacturing (WAAM). Instead of powder, WAAM uses a metal wire that is melted by an electric arc. The process is controlled by robotic arms. WAAM is also capable of producing large-sized metal parts, as demonstrated by the Dutch company MX3D and its nine thousand-pound 41-foot stainless steel bridge in Amsterdam, as well as an oil and gas equipment repair part, proving that parts can be made in the field.

Micro 3D printing

Micro parts printed from steel (Source: 3D MicroPrint)

Micro-scale additive manufacturing, or micro 3D printing, makes it possible to manufacture products with a resolution of a few microns (or less).

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