MoldMAX HH (high-hard) is a high-strength beryllium copper mold alloy, made by Materion Brush Performance Alloys, for plastics molding applications.
This alloy has a hardness and strength comparable with standard tool steels but its thermal conductivity is at four to six times higher.
MoldMAX HH is used for injection mold cores and cavities and blow mold pinch-offs. Its high hardness provides durability in applications where other high conductivity copper alloys fail. The alloy also resists galling against other mold alloys, including itself.