Copper Alloy No. C91700 is a medium strength casting alloy. Formerly it was known as Nickel Gear Bronze and 861/2-12- 0-0-11/2; these names are no longer recommended. It has a good combination of strength, ductility and resistance to corrosion and wear. Its typical tensile strength is 60,000 psi in the as-cast condition. Typical applications include gears and worm wheels. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Cu-519. Producer or source: Copper alloy foundries.