LINEAR THERMAL EXPANSION COEFFICIENT OF ALUMINUM ALLOYS


Thermal expansion coefficient of aluminum is relatively large compared to other metals. Linear thermal expansion coefficients for aluminum and aluminum alloys are given in the following chart.


Linear Thermal Expansion Coefficient Values for Aluminum Alloys
Metal or Alloy Temp. Coefficient of Thermal Expansion (CTE)
10-6 (°C)-1 10-6 (°F)-1
Aluminum (99.996%) 20-100°C / 68-212°F 23.6 13.1
Wrought alloys
1060, 1100 20-100°C / 68-212°F 23.6 13.1
2011, 2014 23.0 12.8
2024 22.8 12.7
2218 22.3 12.4
3003 23.2 12.9
4032 19.4 10.8
5005, 5050, 5052 23.8 13.2
5056 24.1 13.4
5083 23.4 13.0
5086 60-300°C / 140-572°F 23.9 13.3
5154 20-100°C / 68-212°F 23.9 13.3
5357 23.7 13.2
 6061, 6063 23.4 13.0
7075 23.2 12.9
Casting alloys
242.0 20-100°C / 68-212°F 22.5 12.5
295.0 22.9 12.7
356.0 21.4 11.9
413.0 20.5 11.4
514.0 23.9 13.3
520.0 25.2 14.0

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