LINEAR THERMAL EXPANSION COEFFICIENT OF COPPER AND COPPER ALLOYS


Linear thermal expansion coefficients for copper and copper alloys including bronze and brass are given in the following chart.

Linear Thermal Expansion Coefficient Values for Copper Alloys
Material Temp. Coefficient of Thermal Expansion
10-6 (°C)-1 10-6 (°F)-1
Wrought Coppers
Pure copper 20°C / 68°F 16.5 9.2
Electrolytic tough pitch copper (ETP) 20-100°C / 68-212°F 16.8 9.4
Free-machining copper, 0.5% Te or 1% Pb 20-300°C / 68-572°F 17.7 9.9
Wrought Alloys
Commercial bronze, 90% 20-300°C / 68-572°F 18.4 10.3
Red brass, 85% 18.7 10.4
Low brass, 80% 19.1 10.6
Cartridge brass, 70% 19.9 11.1
Yellow brass 20.3 11.2
Muntz metal 20.8 11.5
Leaded commercial bronze 18.4 10.2
Free-cutting brass 20.5 11.4
Forging brass 20.7 11.5
Naval brass 21.2 11.8
Manganese bronze (A) 21.2 11.8
Free-cutting phosphor bronze 17.3 9.6
Aluminum bronze (Class 1) 16.8 9.4
Beryllium copper 17.8 9.9

Reference: