Introduction M202 Austria Bailu quality pre-hardened plastic mold steel, M202 steel hardness and uniform structure, excellent cutting and polishing performance for spark machine operation, can be used for flame hardened, chrome plated and oxidation. Uniform hardness and metallurgical structure, special heat treatment hardened to 29-33HRC, excellent cutting and polishing properties, and flame hardening, hard chrome plating and nitriding treatment. Factory state: Pre-hardened to 950-1050N / mm2 (29-33HRC) 2 uses size plastic mold and die-casting alloy die holder general requirements?. 3 heat-treated forged:? 1050-850 ℃ furnace cooling. Annealing: 800-900 ℃ air cooling. Quenching: 850-900 ℃ cooling. 4 Chemical composition (%): C: 0.40 Mo: 0.2 Mn: 1.5 Cr: 2.0 Si: 0.3 S: 0.028