2.Factory state: Prehardening  HRC 28-31.

3.Chemical composition (for reference only):

4.Characteristic application:

Because of their high hardness when they were finished, their polishing, wear-resistance, tensile strength and compressive strength are more better. This kind of steel is apply to the mould of high polishing and high demand and the plastic of PA, POM, PS, PE, PP, ABS.