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ACI-ASTM CA40 Steel vs. PPE

ACI-ASTM CA40 steel and PPE belong to fundamentally different material chemistries. ACI-ASTM CA40 steel is a metal, while PPE is a polymeric material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 15 material properties with values for both materials. Properties with values for just one material (26, 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 PPE.

ACI-ASTM CA40 (SCS2A, J91153) Cast Stainless SteelPolyphenylene Ether (PPE)
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
2.3
Elongation at Break, % 10
30
Tensile Strength: Ultimate (UTS), MPa 910
55

Thermal Properties

Maximum Temperature: Mechanical, °C 750
90
Melting Onset (Solidus), °C 1500
260
Specific Heat Capacity, J/kg-K 480
1200
Thermal Conductivity, W/m-K 25
0.22
Thermal Expansion, µm/m-K 10
90

Otherwise Unclassified Properties

Density, g/cm3 7.7
1.1

Common Calculations

Stiffness to Weight: Axial, points 14
1.2
Stiffness to Weight: Bending, points 25
42
Strength to Weight: Axial, points 33
14
Strength to Weight: Bending, points 27
30
Thermal Diffusivity, mm2/s 6.7
0.17
Thermal Shock Resistance, points 33
19