BÖHLER M261 is a precipitation-hardening steel grade for plastic moulds, featuring excellent machinability in the as-supplied, i.e. solution annealed and aged, condition. There is no need for an additional heat treatment, significantly shortening the throughput time.
| Etchability | Machinability supplied | Polishability | Through hardenable | Toughness | Wear resistance |
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| C | Si | Mn | S | Cr | Ni | Cu | Al | |
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| 0.13 | 0.30 | 2.00 | 0.15 | 0.35 | 3.50 | 1.20 | 1.20 |
