Tin brass is corrosion resistant in fresh water and sea water. It is commonly referred to as navy brass. The tin content of tin brass is 1%, containing too much tin, which reduces the plasticity of the alloy. According to the amount of zinc in the alloy, it is divided into alpha tin brass and (alpha + beta) tin brass. Single phase tin brass, such as 70Cu-29Zn-1Sn, has good mechanical properties, soft tensile strength of 350MPa, elongation at 60%, excellent cold working performance, hot rolling and hot extrusion, but not hot and hot forging. It is widely used in high strength corrosion resistant condensing pipes for ships and thermal power plants. This alloy has a tendency of stress corrosion cracking, so the cold worked tube must be annealed at low temperature to eliminate stress. (alpha + beta) tin brass, such as 62Cu-37Zn-1Sn, has good mechanical properties, soft tensile strength of 380MPa, extension rate 40%, cold and hot pressure processing, easy cutting, good weldability, high corrosion resistance in sea water, suitable for ship parts, and parts contact with seawater and gasoline.