Delivered with annealed black leather (+ sandblasting), hardness ≤255HB(or according to contract standard).
Air cooling hardening method for die steel, is the most widely used hot work die steel; High toughness and cold and hot fatigue resistance; It has good toughness, thermal fatigue resistance and certain wear resistance at medium temperature. The cavitation heat treatment type becomes smaller, and the oxide scale produced by air quenching has a small tendency and can resist the erosion of molten aluminum. Manufacture of thermal press dies and mandrels for the manufacture of aluminum alloy profiles; Die casting die for die pole hammer, die for forging press, die hammer for fine silver machine; die die for aluminum, copper and their alloys with transverse cavity temperature rising below 600℃