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bronze
An alloy of copper and tin, known since the 4th millennium BC, and used then for tools and weapons, now for machine parts and marine hardware. Statues are often cast in bronze. It is a hard, strong alloy with good corrosion-resistance (the patina formed in air is protective).
Various other components are added to bronze to improve hardness or machinability, such as aluminum, iron, lead, zinc, and phosphorus. Aluminum bronzes, and some others, contain no tin.
Related category
• INORGANIC CHEMISTRY
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