Hot work die steels are usually classified according to chemical composition, application and properties.

（１）按钢的化学成分分类

(1) Classification by chemical composition of steel

包括低合金热作模具钢、钨系热作模具钢、热作模具钢铬系热作模具钢、铬钼系热作模具钢、奥氏体系热作模具钢、马氏体系热作模具钢。

It includes low alloy hot working die steel, tungsten hot working die steel, chromium hot working die steel, chromium molybdenum hot working die steel, austenite hot working die steel and martensite hot working die steel.

（2）按钢的用途分类

(2) Classification according to the use of steel

包括锤锻模具钢、机锻模具钢、热挤压模具钢、压铸模具钢、热冲裁模具钢、特殊用途模具钢等 .

Including hammer forging die steel, machine forging die steel, hot extrusion die steel, die casting die steel, hot blanking die steel, special purpose die steel, etc

（3）按钢的性能分类

(3) Classification by properties of steel

包括低耐热高韧性热作模具钢、中耐热高热强性热作模具钢、高耐热高髍发热作模具钢、无磁模具钢、时效硬化塑料模具钢。

It includes low heat resistance and high toughness hot working die steel, medium heat resistance and high heat strength hot working die steel, high heat resistance and high heat resistance hot working die steel, non-magnetic die steel and age hardening plastic die steel.