Thermal Expansion Chart

The coefficient of thermal expansion tells you how much a material grows per degree of temperature rise. This chart lists values for common engineering materials.

Material x10^-6 per C x10^-6 per F
Carbon steel 12 6.7
Stainless steel (304) 17 9.6
Cast iron 11 6.1
Titanium 8.6 4.8
Copper 17 9.4
Brass 19 10.6
Bronze 18 10.0
Aluminum 23 12.8
Magnesium 26 14.5
PEEK 47 26
Polycarbonate 68 38
ABS 90 50
Nylon 80 to 100 45 to 55
Acetal (Delrin) 110 61
PTFE 135 75
UHMW 150 to 200 85 to 110
Plastics move far more. Plastics expand roughly ten times as much as steel. Designs that mix metals and plastics, or that see wide temperature swings, must allow for the difference in fit and clearance.

See the Thermal Expansion Calculator and the Material Density Chart.

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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.