Copper Alloy No. 978 is a cast leaded nickel bronze containing 25% nickel; it is known as 25% Nickel Silver. It has a pleasing silvery-white color and high resistance to corrosion in many environments. Its many uses include food handling equipment, ornamental 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-347. Producer or source: Copper alloy foundries.