... 1-6m HRC after hardening and temper:63-66 High speed steel W6Mo5Cr4V2Anneal temperature: 840-860oCRelief annealing temperature: ... 63-66 Characteristic:Tungsten-molybdenum high speed steel developed by China, high performance in toughness , ,hardness, high temperature hardness.Application: Can ... high capacity cutting tools to bear impact force ,such as gear shaper cutter, milling cutter,screw tap,drill ...