CUNISIL-647 is a copper-nickel-silicon precipitation-hardening alloy having high strength, hardness, wear and corrosion resistance. Typical applications include electrical hardware and fasteners. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, and machining. Filing Code: Cu-164. Producer or source: Anaconda American Brass Company.