Chromium Copper-999 is a copper-chromium-silicon alloy which is softened by a high-temperature solution anneal and quench, and will acquire improved properties with a low-temperature precipitation heat treatment. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness and creep. It also includes information on corrosion resistance as well as heat treating, machining, and joining. Filing Code: Cu-10. Producer or source: American Brass Company.