S7 tool steel is a shock-resisting tool steel with excellent impact properties. Because it is an air-hardening steel, it is safe and stable in heat treatment. S7's most important characteristic is its versatility. It is used widely for medium cold work tools and dies, for plastic-molding dies, shear blades, medium hot work dies, master hobs, and for component parts of many products. S7 is the benchmark shock resisting tool steel.
