m303bÖ hler m303 din 1.2083 bÖ hler m303 e hard 1.2083 m303 extraBÖHLER 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.