Used for plastic injection mold, heat-resistant mold (casting copper mold). Designed by the components of alloy with low cracking sensitivity, nickel is about 1%. Suitable for PA, POM, PS, PE, PP, ABS plastic, with sound polishing quality. No porosity and cracks after welding, sound degree of finish after grinding. Through vacuum degassing, after forging, pre-harden to HRC 33 degrees. Hardness of the crossing section distribute homogeneously. Life of die is more than 300,000.