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ACI-ASTM CA40 Steel vs. PCTFE

ACI-ASTM CA40 steel and PCTFE belong to fundamentally different material chemistries. ACI-ASTM CA40 steel is a metal, while PCTFE 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 (31, 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 PCTFE.

ACI-ASTM CA40 (SCS2A, J91153) Cast Stainless SteelPolychlorotrifluoroethylene (PCTFE)
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
1.4
Elongation at Break, % 10
150
Tensile Strength: Ultimate (UTS), MPa 910
36

Thermal Properties

Maximum Temperature: Mechanical, °C 750
150
Melting Onset (Solidus), °C 1500
220
Specific Heat Capacity, J/kg-K 480
920
Thermal Conductivity, W/m-K 25
0.21
Thermal Expansion, µm/m-K 10
130

Otherwise Unclassified Properties

Density, g/cm3 7.7
2.1

Common Calculations

Stiffness to Weight: Axial, points 14
0.37
Stiffness to Weight: Bending, points 25
17
Strength to Weight: Axial, points 33
4.6
Strength to Weight: Bending, points 27
11
Thermal Diffusivity, mm2/s 6.7
0.11
Thermal Shock Resistance, points 33
14