m303BÖHLER M303 EXTRA is a corrosion-resistant, martensitic chromium steel with very good toughness, corrosion resistance, good wear resistance and improved machinabilityBÖHLER 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.