Mold Steel Hardness: What You Need to Know

Mold steel hardness is measured on the Rockwell C (HRC) scale. Typical ranges: P20 at 28-32 HRC, H13 at 44-48 HRC, S136 at 48-52 HRC, and 8407 at 50-54 HRC. Harder steels offer better wear resistance but are more difficult to machine. Softer steels are easier to modify but wear faster. The right hardness depends on: production volume, molding material (glass-filled materials wear faster), part geometry complexity, and required surface finish. Yinzan Technology selects steel grade and heat treatment based on the specific requirements of each project.