Category:Bronzes

Bronzes are copper alloys generally containing 80-95% copper and the rest tin or other metals. Bronzes generally have a lower melting point (~950°C) than copper (1085°C), making them easier to cast. Compared to copper, bronze is a superior tool material because it is less prone to work hardening, corrosion, or oxidation.

• The coefficient of thermal expansion of bronzes is (in general) between 17.5 and 18.

Compositions

• "Modern" bronze is 88% copper and 12% tin
• "Classical" cast bronze is 90/10 Cu/Sn
• "Mild bronze" is 94/6, and was used for sheet stock
• "Bell metal" is 72/28
• "Phosphor bronze" is copper/tin/lead/phosphorus, and used to make springs.