Copper Alloy No. 973 is a cast leaded nickel brass containing 12% nickel; it is and has been known commercially as 12% Leaded Nickel Silver. It has a pleasing whiteness and high resistance to corrosion. Among its many uses are ornamental and decorative applications and marine hardware. 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-322. Producer or source: Copper alloy foundries.