m303BÖHLER M303 is a pre-hardened martensitic chromium steel with very hh toughness, wear resistance and machinability. It is suitable for tools processing corrosive moulding compounds, e.g. PVC, and for food and beverage contact.bÖ hler m303 din 1.2083 bÖ hler m303 e hard 1.2083 m303 extra