Gunmetal, Phosphor Bronze

Phosphor Bronzes, more accurately described as Tin Bronzes, are alloys of copper where tin is the main alloying element with phosphorus added primarily as a deoxidant. Alloys containing up to about 9% tin are wrought. Alloys containing from about 10-12% tin are used as-cast. They are strong, corrosion resistant alloys with many traditional uses in marine environments and in electrical and electronic engineering where their especially at the higher cast level, imparts good wear resistance for traditional use in bearing components.