Bronze

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Bronze
Copper-tin alloy, term also loosely used for some other copper alloys. Oldest copper alloy, generally used for sculptures but also as the base metal for ormolu and furniture mounts. The addition of tin to copper makes it easier to cast, strengthens and hardens the metal.
 
In antiquity and historical usage, an alloy of copper and tin. Usually with up to 14% tin, but many examples of ancient alloys are known with higher tin contents. 14% tin is the limit of solid solution of tin in well annealed alpha-bronzes. In modern usage, the term bronze is associated with a number of copper alloys that may contain no tin at all and in which case the composition of the alloy should be specified.