Copper Alloy No. C71300 contains nominally 75% copper and 25% nickel. It was developed for use as a U.S. coinage alloy. Normally it is not furnished for general consumer use; however, it can be purchased by anyone who has a valid use for it. It is characterized by a good combination of strength, ductility and corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-435. Producer or source: Copper and copper alloy mills.