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PCTFE vs. SAE-AISI 4150 Steel

PCTFE and SAE-AISI 4150 steel belong to fundamentally different material chemistries. PCTFE is a polymeric material, while SAE-AISI 4150 steel is a metal. 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 (30, 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 PCTFE and the bottom bar is SAE-AISI 4150 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 1.4
190
Elongation at Break, % 150
12 to 20
Tensile Strength: Ultimate (UTS), MPa 36
660 to 1310

Thermal Properties

Maximum Temperature: Mechanical, °C 150
420
Melting Onset (Solidus), °C 220
1420
Specific Heat Capacity, J/kg-K 920
470
Thermal Conductivity, W/m-K 0.21
42
Thermal Expansion, µm/m-K 130
13

Otherwise Unclassified Properties

Density, g/cm3 2.1
7.8

Common Calculations

Stiffness to Weight: Axial, points 0.37
13
Stiffness to Weight: Bending, points 17
24
Strength to Weight: Axial, points 4.6
24 to 47
Strength to Weight: Bending, points 11
22 to 34
Thermal Diffusivity, mm2/s 0.11
11
Thermal Shock Resistance, points 14
19 to 39