D2 tool steel, 1.2379 die steel Annealing Hardness: HB ... Quenching1000-1050 Gas Cooler Temperature 500 Detailed Product Description D2 tool steel, 1.2379 die steel Annealing Hardness: HB 225 ... used for cold Dies,Press,Roll,Pressing Dies,Punch,Cutter,ShearB D2 tool steel, 1.2379 die steel 1)Annealing Hardness ... Min58 4)Application: cold Dies,Press,Roll,Pressing Dies,Punch,Cutter,Shear Blade,Blanking Die