... grind high speed steels, tool & die steels, alloy steels, Aerospace alloys and hard stainless steels We have the 1A1,12A2,6A2,11A2 ... ,11B2,11C9,11EE9,11V9,12V2,14A1,14E1 and so on, special sizes can be customized When combined with ... bonds can be used for grinding high-speed steels, tool and die steels and super alloys with a hardness greater than HRC 50