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7075 Aluminum vs. Thermoset PI

7075 aluminum and thermoset PI belong to fundamentally different material chemistries. 7075 aluminum is a metal, while thermoset PI is a polymeric material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 10 material properties with values for both materials. Properties with values for just one material (35, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 7075 aluminum and the bottom bar is thermoset PI.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 3.0
1.4 to 1.6
Elongation at Break, % 1.8 to 12
2.0 to 5.9
Maximum Temperature: Mechanical, °C 200
260
Specific Heat Capacity, J/kg-K 870
1130
Strength to Weight: Axial, points 22 to 54
6.5 to 16
Strength to Weight: Bending, points 28 to 52
16 to 30
Tensile Strength: Ultimate (UTS), MPa 240 to 590
37 to 81
Thermal Conductivity, W/m-K 130
0.29 to 1.7
Thermal Diffusivity, mm2/s 50
0.18 to 0.95
Thermal Expansion, µm/m-K 23
38 to 54