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ACI-ASTM CA40 Steel vs. Thermoset PI

ACI-ASTM CA40 steel and thermoset PI belong to fundamentally different material chemistries. ACI-ASTM CA40 steel 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 (36, 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 ACI-ASTM CA40 steel and the bottom bar is thermoset PI.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 7.7
1.4 to 1.6
Elongation at Break, % 10
2.0 to 5.9
Maximum Temperature: Mechanical, °C 750
260
Specific Heat Capacity, J/kg-K 480
1130
Strength to Weight: Axial, points 33
6.5 to 16
Strength to Weight: Bending, points 27
16 to 30
Tensile Strength: Ultimate (UTS), MPa 910
37 to 81
Thermal Conductivity, W/m-K 25
0.29 to 1.7
Thermal Diffusivity, mm2/s 6.7
0.18 to 0.95
Thermal Expansion, µm/m-K 10
38 to 54