... hot forming steels, brass, aluminium and its alloys, hot work shear blades, etc.Mechanical PropertyAnnealed Hardness: HB≤241Quenching Hardness: ... -1.750.80-1.20 Properties:Hot work tool steel with high level of resistance to thermal shock and fatigue, ... , good machinability and polishability, fine grain size with high level toughness, dimensional stability, extra fine structure without grain boundary ...