Nickel Silver rod (AWS A5.8: RBCuZn-D / DIN 1733: CuZn42Ni) is a brazing alloy containing about 10% of nickel. It is primarily used for brazing tungsten carbides, copper alloys, nickel alloys, stainless steels, carbon steels, and cast iron. It is commonly used for building-up or overlaying worn parts such as gear teeth, bearings and valve seats. A boric acid or borax flux is required. Flux-coated in different colors can be supplied as requested.