ALUMINUM ALLOY 390 is an aluminum die casting alloy with a controlled copper content of 4.0-5.0%. It is the most notable hypereutectic alloy of the aluminum-silicon series. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, and machining. Filing Code: Al-313. Producer or source: Aluminum Smelting and Refining Company Inc..