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30 CF PEEK vs. SAE-AISI 4150 Steel

30 CF PEEK and SAE-AISI 4150 steel belong to fundamentally different material chemistries. 30 CF PEEK 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 16 material properties with values for both materials. Properties with values for just one material (28, 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 30 CF PEEK and the bottom bar is SAE-AISI 4150 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 24
190
Elongation at Break, % 1.6
12 to 20
Shear Strength, MPa 100
410 to 800
Tensile Strength: Ultimate (UTS), MPa 200
660 to 1310

Thermal Properties

Maximum Temperature: Mechanical, °C 330
420
Melting Onset (Solidus), °C 340
1420
Specific Heat Capacity, J/kg-K 1520
470
Thermal Conductivity, W/m-K 0.93
42
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Density, g/cm3 1.4
7.8

Common Calculations

Stiffness to Weight: Axial, points 9.5
13
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 41
24 to 47
Strength to Weight: Bending, points 55
22 to 34
Thermal Diffusivity, mm2/s 0.44
11
Thermal Shock Resistance, points 40
19 to 39