MoldMAX HH High Hard 15 beryllium copper round bar is the premier copper mold alloy This alloy has a hardness and strength comparable with standard tool steels but its thermal conductivity is four to six times higherMoldMAX HH is used for injection mold cores and cavities and blow mold pinchoffs Due to the unique combination of thermal conductivity and strength available in these copper mold alloys, you gain advantages like shorter cycle time, improved plastic part dimensional control, better parting line maintenance, excellent corrosion resistanceThe high hardness of MoldMAX HH provides durability in applications where other high conductivity copper alloys fail The alloy resists galling against other mold alloys, including itselfMoldMAX is a trademark of Materion Corporation