BÖHLER M238 is a hardened and tempered, not corrosion resistant plastic mould steel. Because of the Ni-addition, there is no hardness decrease in the center of large sizes (up to 600 mm). A special melting technology offers good machinability.
| Etchability | Machinability supplied | Polishability | Through hardenable | Toughness | Wear resistance |
|---|---|---|---|---|---|
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| SEL | EN |
|---|---|
| 1.2738 | 40CrMnNiMo8-6-4 |
| EN ISO |
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| 4957 |
| C | Si | Mn | Cr | Mo | Ni | |
|---|---|---|---|---|---|---|
| 0.38 | 0.30 | 1.50 | 2.00 | 0.20 | 1.10 |
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