DMLS / R&D SERVICES » DMLS Materials
17-4 Stainless Steel GP1
StainlessSteel 17-4 GP1 is a pre-alloyed stainless steel in fine powder form. Its composition corresponds to US classification 17-4 PH and European 1.4542 and fulfils the requirements of AMS 5643 for Mn, Mo, Ni, Si, C, Cr and Cu. This kind of steel is characterized by having very good corrosion resistance and mechanical properties, especially excellent ductility in laser processed state, and is widely used in a variety of engineering applications.
This material is ideal for many part-building applications (DirectPart) such as functional metal prototypes, small series products, individualised products or spare parts. Standard processing parameters use full melting of the entire geometry with 20 um layer thickness, but it is also possible to use skin and core building style to increase the build speed. Using standard parameters the mechanical properties are fairly uniform in all directions. Laser-sintered parts made from StainlessSteel GP1 can be welded, machined, micro shot-peened, polished and coated if required. Unexposed powder can be reused without restriction or refreshing.
Typical applications:
- engineering applications including functional prototypes, small series products, individualised products or spare parts.
- parts requiring high corrosion resistance, sterilisability, etc.
- parts requiring particularly high toughness and ductility.
15-5 Stainless Steel PH1
StainlessSteel 15-5 PH1 is a pre-alloyed stainless steel in fine powder form. This kind of steel is characterized by having very good corrosion resistance and excellent mechanical properties, especially in the precipitation hardened state. This type of steel is widely used in variety of medical, aerospace and other engineering applications requiring high hardness, strength and corrosion resistance.
This material is ideal for many part-building applications (DirectPart) such as functional metal prototypes, small series products, individualised products or spare parts. One potential application is injection moulding tools for processing of corrosive plastics. Standard processing parameters use full melting of the entire geometry with 20 µm layer thickness, but it is also possible to use 40µm layer thickness and skin and core building style to increase the build speed. Using standard parameters the mechanical properties are fairly uniform in all directions. Parts made from StainlessSteel 15-5 PH1 can be machined, spark-eroded, welded, micro shot-peened, polished and coated if required.
Typical applications:
- engineering applications including functional prototypes, small series products, individualised products or spare parts.
- parts requiring high corrosion resistance, sterilisability, etc.
- parts requiring particularly high strength and hardness.
CobaltChrome MP1
CobaltChrome MP1 is a fine powder mixture for laser-sintering on EOSINT M 270 systems, which produces parts in a cobalt-chrome-molybdenum-based superalloy. This class of superalloy is characterized by having excellent mechanical properties (strength, hardness, etc.), corrosion resistance and temperature resistance. Such alloys are commonly used in biomedical applications such as dental and medical implants (note: widely used in Europe but much less so in North America), and also for high-temperature engineering applications such as in aero engines.
The chemistry of CobaltChrome MP1 conforms to the composition UNS R31538 of high carbon CoCrMo alloy. It is nickel-free (< 0.1 % nickel content), sterilisable and suitable for biomedical applications. The laser-sintered parts are characterized by a fine, uniform crystal grain structure. They fully meet the requirements of ISO 5832-4 and ASTM F75 for cast CoCrMo implant alloys, as well as the requirements of ISO 5832-12 and ASTM F1537 for wrought CoCrMo implants alloys except remaining elongation. The remaining elongation can be increased to fulfil even this standard by hot isostatic pressing (HIP).
This material is ideal for many part-building applications (DirectPart) such as functional metal prototypes, small series products, individualised products or spare parts. Standard processing parameters use full melting of the entire geometry with 20 µm layer thickness, but it is also possible to use skin and core building style to increase the build speed. Using standard parameters the mechanical properties are fairly uniform in all directions. Laser-sintered parts made from CobaltChrome MP1 can be welded, machined, micro shot-peened, polished and coated if required. Unexposed powder can be reused without restriction or refreshing.
Typical applications:
- prototype or one-off biomedical implants, e.g. spinal, knee, hip bone, toe and dental
- parts requiring high mechanical properties in elevated temperatures (500 - 1000 °C) and with good corrosion resistance, e.g. turbines and other parts for engines, cutting parts, etc.
- parts having very small features such as thin walls, pins, etc., which require particularly high strength and/or stiffness.
Titanium Ti64 / Ti64ELI
Titanium Ti64 is a pre-alloyed Ti6AlV4 alloy in fine powder form. This well-known light alloy is characterized by having excellent mechanical properties and corrosion resistance combined with low specific weight and biocompatibility. The ELI (extra-low interstitial) version has particularly low levels of impurities.
Typical applications:
- parts requiring a combination of high mechanical properties and low specific weight, e.g. structural and engine components for aerospace and motor racing applications, etc.
- biomedical implants
Inco625
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Inco718
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Technical Data (Comparison Chart)
| MECHANICAL PROPERTIES | |||||
|---|---|---|---|---|---|
| PROPERTIES | ASTM | Units | Stainless Steel 17-4 | Stainless Steel 15-5 | Cobalt Chrome MP1 |
| Ultimate Tensile Strength (MPIF 10) (in horizontal direction xy) (in vertical direction z) |
MPa | 900 | 1150 ± 50 MPa 1050 ±50 MPa |
1400 MPa, ± 40 MPa 203 ksi, ± 6 ksi 1150 MPa,± 50 MPa 167 ksi ± 7 ksi |
|
| Yield Strength (rp 0.2%) (in horizontal direction xy) (in vertical direction z) |
1050 ±50 MPa 1000 ±50 MPa |
980 MPa, ± 30 MPa 142 ksi, ± 4 ksi 880 MPa, ± 40 MPa 128 ksi, ± 6 ksi |
|||
| Elongation @ Break (in horizontal direction xy) (in vertical direction z) (after hot isostatic pressing (hip) |
% | up to 30% | 16 ± 4 % 17 ± 4 % |
10%, ± 2% 9%, ± 1% 21, ± 24% |
|
| Young's Modulus (in horizontal direction xy) (in vertical direction z) |
GPa | 190 | typically 170 ± 20GPa | 210 GPa, ± 10 GPa 30 msi, ± 1.5 msi 200 GPa, ± 20 GPa 29 msi, ± 3 msi |
|
| Hardness as laser-sintered after post-hardening |
HV HRC |
250-320 40 |
30-35 HRC | 40-45HRC | |
| Surface Roughness after shot-peening after polishing |
Ra 2.5-4.5um, Ry 15-40um Ra 0.1-0.2mil, Ry 0.6-1.6um Rz up to <0.5um (can be very finely polished) |
Ra 2.5-4.5 um, Ry 15-40 um Ra 0.1-0.2 mil, Ry 0.6-1.6 um Rz up to < 0.5 um (can be very finely polished) |
approx. Ra 10um, Rz 40-50um Ra 0.39, Rz 1.6-2.0 mil Rz up to < 1um <0.004mil |
||
| last updated: 05.27.07 | |||||
| THERMAL PROPERTIES | |||
|---|---|---|---|
| PROPERTIES | Stainless Steel 17-4 | Stainless Steel 15-5 | Cobalt Chrome MP1 |
| Coefficient of Thermal Expansion (20-500°C) (500-1000°C) |
approx. 13-20 x 10-6 m/m °C approx. 55-68 x 10-6 in/in °F |
13.8 ±0.8 W/m°C, (96 ± 6 Btu) 15.8 ±0.8 W/m°C (110 ± 6 Btu) |
11.5x10-6m/m °C 11.5x10-6in/in °C 12.5x10-6m/m °C 12.5x10-6in/in °C |
| Thermal Conductivity ( @ 20°C) (@ 300°C) (@ 500°C) |
approx. 12-14 W/mK approx. 83-97 Btu(hft2°F/in) |
13.8 ± 0.8 W/m°C 13.7 ± 0.8 W/m°C |
11 W/mk 76 Btu(h.ft2.°F/in) 16W/mk 111 Btu(h.ft2.°F/in) 20 W/mk 139Btu(h.ft2.°F/in) |
| Maximum Operating Temperature | 550°C 1000°C |
350-400°C | 11500°C 2100°F |
| last updated: 05.27.07 | |||
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