Copper and copper alloy welding wires are used widely and can be used to weld sorts of copper alloy ,especially tin brass welding wires are widely used to braze carbon steel ,cast iron , hard carbide tools and so on; Because of the good corrosion and wear resistance ,people use them to weld the parts easily effected form wear between metals and the parts easily corrosed by seawater ,such as bearing ,valve ,sealing surface and so on. When o x y acetylene flame gax welding ,The brass welding wire should use together with the copper gas welding (CJ301)melting agent Acetylene.