Process Data Sheet
EOS Steel 42CrMo4 for EOS M 290 I 40/80 µm
EOS M 290 - 40/80 µm - TRL 3
Process Information Metal
This process product is optimized for flexible and fast production of 42CrMo4 parts with EOS M 290. The parameter set has three different layer thickness options that can all be utilized within the same build: 40µm, 80 µm and 40/80 µm SkinCore. Both can be used separately for different parts or combined by using 40/80 µm Skin with faster 80 µm for the core of the part and higher quality 40 µm building for the surface of the part with defined thickness. Sectionioning parts in vertical direction for different parameters is also possible.
| System Setup | EOS M 290 |
|---|---|
| EOS Material set | 42CrMo4_040_080_CoreM291 |
| Required Software Plan | EOS BUILD |
| Software Requirements |
EOSPRINT 2.13 or newer |
| Recoater Blade | Ceramic |
| Nozzle | EOS Grid Nozzle |
| Inert gas | Nitrogen |
| Sieve | 90 µm |
| Additional Information | |
|---|---|
| Layer Thickness | 40/80 µm |
| Volume Rate | 4.2 - 7.68 mm³/s |
| Typical Dimensional Change after HT [%] | + 0.2 % % |
Chemical and Physical Properties of Parts
Microstructure of the Produced Parts
| Defects | Thickness | Result | Number of Samples |
|---|---|---|---|
| Average Defect Percentage | 40 µm | < 0.1 % % | - |
| Average Defect Percentage | 80 µm | < 0.2 % % | - |
Mechanical Properties
Mechanical Properties Heat Treated
| EN ISO 6892-1 Room Temperature | 40 µm | Yield Strength [MPa] | Tensile Strength [MPa] | Elongation at Break [%] | Reduction of Area Z [%] | Modulus of elasticity [GPa] | Number of Samples |
|---|---|---|---|---|---|---|
| Vertical | 1185 | 1245 | 12 | - | - | - |
| Horizontal | 1180 | 1240 | 12 | - | - | - |
Tempered at 550 °C
Mechanical Properties Heat Treated
| EN ISO 6892-1 Room Temperature | 80 µm | Yield Strength [MPa] | Tensile Strength [MPa] | Elongation at Break [%] | Reduction of Area Z [%] | Modulus of elasticity [GPa] | Number of Samples |
|---|---|---|---|---|---|---|
| Vertical | 1170 | 1230 | 11 | - | - | - |
| Horizontal | 1170 | 1230 | 11 | - | - | - |
Tempered at 550 °C
Impact Toughness
| EN ISO 148-1, Charpy-V Heat Treated | |
|---|---|
| Typical Impact Toughness [J] | Vertical: 56 Horizontal: 48 |
| Layer Thickness | 40 µm |
| EN ISO 148-1, Charpy-V Heat Treated | |
|---|---|
| Typical Impact Toughness [J] | Vertical: 47 Horizontal: 58 |
| Layer Thickness | 80 µm |
Surface Roughness
