M202 has been heat-treated steel, even hardness, up to 278-311HB ,29-33HRC, variant made of mold never, cutting and polishing performance for power loss operation, you can flame hardened, chrome plated and nitrided. 

 Chemical composition 
 C Cr Mn Si Mn W tungsten vanadium silicon V 

 0.95 0.5 0.5 1.1 0.3 0.1 

 Detailed parameters 
 M202 factory specifications: Pre-hard to 950-1050N/mm2 (29-33HRC). 

 M202 uses: all size plastic molds, and can be used for tin, lead, zinc alloy die-casting mold of the mold base. 

 M202 Forged :1050-850 ℃ oven to cool. 

 M202 mass recovery :850-900 ℃ oven to cool. 

 M202 stress relief: Redu evenly, stay 1-2 hours in the oven to cool. 

 M202 quenching: 840-860 ℃ oil or air :860-880 ℃. Stay at least 10 minutes, more than 20mm in thickness more than 1mm see every 1 / 2 minutes, the hardness of approximately 54HRC.