... 1,M42/skh-9 2.High speed tool steel 3.hot rolled 4.good machinability and polishing property 5.apply to die ... alter the properties of the steel. It can do hot work and cold work and it has good machinability and ... , gear cutter, broach, planer etc.Die: all kinds of hot work, cold work die and punch, cutter, cutter, various ... 2-200mmBlack or grinding M42, High Speed Tool steel,hot rolled round steel,alloy