Sterling Silver (Silversmiths grade) contains a minimum of 92.50% silver; the standard grade contains a minimum of 92.10% silver. Historically the remainder was unrestricted but copper was (and is) used because it is more desirable, in general, than other metals. Also, copper is a more effective hardener than other metals that have been considered; however, copper lowers the melting point substantially and lowers the electrical and thermal conductivities appreciably. Sterling Silver is used for flat and hollow tableware, various items of jewelry and special industrial applications. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, forming, heat treating, and joining. Filing Code: Ag-11. Producer or source: Precious Metals Producers.