Hot work die steel is mainly used to manufacture the mold which needs to be processed under high temperature, such as hot pressing die, hot stamping die, hot deformation die (hot upsetting die), hot extrusion die and so on. Therefore, the steel has higher requirements on the thermal hardness, high temperature wear resistance, thermal fatigue strength, thermal conductivity and hardenability. Besides, good machinability is necessary.

According to the performance characteristics of hot working die steel, including low heat resistant and high toughness die steel, medium heat resistant ductile steel, Gao Naire hot work die steel, special purpose hot work die steel.

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