Copper Alloy No. C87400 is a copper-base casting alloy containing nominally 14% zinc and 3.5% silicon. It possesses a combination of high strength, good ductility and good-to-excellent resistance to corrosion. This alloy cannot be hardened nor strengthened by any thermal treatment. It is used for numerous applications such as bearings, gears, impellers and valve stems. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Cu-506. Producer or source: Copper alloy foundries.