Linear thermal expansion coefficients of metals including
aluminum, steel, bronze, iron, brass, copper, gold, silver, invar,
magnesium, nickel, titanium and zinc are given in the following thermal expansion coefficients chart. These linear thermal expansion coefficients are room temperature values of metals.
Linear thermal expansion coefficient is defined as material's fractional change
in length divided by the change in temperature. Coefficient of linear thermal
expansion is designated by the symbol α (alpha). The SI unit of thermal
expansion coefficient is (°C)-1 and U.S. customary unit is (°F)-1.
|
Room Temperature Linear Thermal Expansion Coefficient Values for Metals |
|
Aluminum Alloys |
|
Material |
Coefficient of Thermal Expansion
(CTE) |
|
10-6 (°C)-1 |
10-6 (°F)-1 |
|
Aluminum Alloy 1100 |
23.6 |
13.1 |
|
Aluminum Alloy 2011 |
23.0 |
12.8 |
|
Aluminum Alloy 2024 |
22.9 |
12.7 |
|
Aluminum Alloy 5086 |
23.8 |
13.2 |
|
Aluminum Alloy 6061 |
23.6 |
13.1 |
|
Aluminum Alloy 7075 |
23.4 |
13.0 |
|
Aluminum Alloy 356.0 |
21.5 |
11.9 |
|
Copper-Base Alloys |
|
Material |
Coefficient of Thermal Expansion |
|
10-6 (°C)-1 |
10-6 (°F)-1 |
|
Copper Alloy C11000 (electrolytic tough pitch) |
17.0 |
9.4 |
|
Copper Alloy C17200 (beryllium - copper) |
16.7 |
9.3 |
|
Copper Alloy C22000 (Commercial bronze, 90%) |
18.4 |
10.2 |
|
Copper Alloy C23000 (Red brass, 85 %) |
18.7 |
10.4 |
|
Copper Alloy C26000 (cartridge brass) |
19.9 |
11.1 |
|
Copper Alloy C27000 (Yellow Brass) |
20.3 |
11.3 |
|
Copper Alloy C36000 (free - cutting brass) |
20.5 |
11.4 |
|
Copper Alloy C51000 (Phosphor bronze, 5% A) |
17.8 |
9.9 |
|
Copper Alloy C62300 (Aluminum bronze, 9%) |
16.2 |
9.0 |
|
Copper Alloy C71500 (copper - nickel, 30%) |
16.2 |
9.0 |
|
Copper Alloy C93200 (bearing bronze) |
18.0 |
10.0 |
|
Cast Irons |
|
Material |
Coefficient of Thermal Expansion |
|
10-6 (°C)-1 |
10-6 (°F)-1 |
|
Gray Irons |
|
Grade G1800 |
11.4 |
6.3 |
|
Grade G3000 |
11.4 |
6.3 |
|
Grade G4000 |
11.4 |
6.3 |
|
Ductile Irons |
|
Grade 60-40-18 |
11.2 |
6.2 |
|
Grade 80-55-06 |
10.6 |
5.9 |
|
Precious Metals |
|
Material |
Coefficient of Thermal Expansion |
|
10-6 (°C)-1 |
10-6 (°F)-1 |
|
Gold (commercially pure) |
14.2 |
7.9 |
|
Silver (commercially pure) |
19.7 |
10.9 |
|
Steels |
|
Material |
Coefficient of Thermal Expansion |
|
10-6 (°C)-1 |
10-6 (°F)-1 |
|
Plain Carbon and Low Alloy Steels |
|
Steel Alloy A36 |
11.7 |
6.5 |
|
Steel Alloy 1020 |
11.7 |
6.5 |
|
Steel Alloy 1040 |
11.3 |
6.3 |
|
Steel Alloy 4140 |
12.3 |
6.8 |
|
Steel Alloy 4340 |
12.3 |
6.8 |
|
Stainless Steels |
|
Stainless Alloy 304 |
17.2 |
9.6 |
|
Stainless Alloy 316 |
15.9 |
8.8 |
|
Stainless Alloy 405 |
10.8 |
6.0 |
|
Stainless Alloy 440A |
10.2 |
5.7 |
|
Stainless Alloy 17-7PH |
11.0 |
6.1 |
|
Titanium Alloys |
|
Material |
Coefficient of Thermal Expansion |
|
10-6 (°C)-1 |
10-6 (°F)-1 |
|
Commercially Pure (ASTM Grade 1) |
8.6 |
4.8 |
|
Titanium Alloy Ti - 5Al - 2.5Sn |
9.4 |
5.2 |
|
Titanium Alloy Ti - 6Al - 4V |
8.6 |
4.8 |
|
Titanium Alloy Ti-8Mn |
10.8 |
6.0 |
|
Various Metals |
|
Material |
Coefficient of Thermal Expansion |
|
10-6 (°C)-1 |
10-6 (°F)-1 |
|
Magnesium Alloy AZ31B |
26.0 |
14.4 |
|
Nickel 200 |
13.3 |
7.4 |
|
Inconel 625 |
12.8 |
7.1 |
|
Inconel 718 |
13.0 |
7.2 |
|
Monel |
15.7 |
8.7 |
|
Monel 400 |
13.9 |
7.7 |
|
Haynes Alloy 25 |
12.3 |
6.8 |
|
Invar |
1.6 |
0.9 |
|
Super Invar |
0.72 |
0.40 |
|
Kovar |
5.1 |
2.8 |
|
Chemical Lead |
29.3 |
16.3 |
|
Antimonial lead (6 %) |
27.2 |
15.1 |
|
Tin (Commercially pure) |
23.8 |
13.2 |
|
Lead - tin solder (60Sn - 40 Pb) |
24.0 |
13.3 |
|
Zinc (Commercially pure) |
23.0 - 32.5 |
12.7 - 18.1 |