It is a special brass wire with a small amount of tin and silicon.Tin can improve the fluidity of the welding wire, and silicon can effectively control the evaporation of zinc, eliminate pores, so as to get a good weld.Suitable for brass, copper gas welding as filling material, also widely used in brazing steel, cast iron and embedded carbide tools. It can also be used as the surfacing material of low pressure valve sealing surface and light load wear-resisting surface.