High quality mold steel hot steel --- H10 

 H10 steel chemical composition shown in Table H10 steel chemical composition (GB / T 1299-2000) w /% C Si Μn Cr WVPS 0.30 ~ 0.40 ① ≤ 0.40 ≤ 0.40 2.20 ~ 2.27 7.50 ~ 9.00 0.20 ~ 0.50 ≤ 0.030 ≤ 0.030 According to user requirements, the carbon content can be increased to 0.40 to 0.50. H10 steel contains more easy to form chromium carbide, tungsten, and therefore have a higher high temperature strength and hardness at 650 ℃ when the hardness of HB ~ 300, but its poor toughness and ductility. 80mm steel section in the following ten to hardenability. This surface layer needs to have high hardness, high wear resistance of large forging die, hot die, flat die forging machine is sufficient. This steel disguised high temperature, resistance to thermal fatigue of alternating hot and cold good. This steel can be used to produce high temperature high-stress, but not shock load the punch, die forging machines, such as flat with the punch and die, inserts, copper alloy extrusion, die casting mold, such as anti-extrusion mold; can also be hot for the hot metal under the force of the cutter and so on.