Abstract MoldMAX LH (Low Hard) is a copper beryllium mold alloy that provides hardness and strength comparable to standard AISI P-20 tool steel and a thermal conductivity five times higher. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on corrosion andwear resistance, and surface qualities as well as forming, machining, and joining. Filing Code: Cu-824. Producer or source: Materion Brush Performance Alloys.