APEX Z39-11 is an aluminum die casting alloy containing copper, silicon and zinc. It is a modification of Apex 39-11 by the addition of zinc. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as casting and machining. Filing Code: Al-122. Producer or source: Apex Smelting Company.