PFA vs. SAE-AISI 4150 Steel

PFA and SAE-AISI 4150 steel belong to fundamentally different material chemistries. PFA 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 11 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 PFA and the bottom bar is SAE-AISI 4150 steel.

Metric UnitsUS Customary Units

Thermal Properties

Maximum Temperature: Mechanical, °C		260
Maximum Temperature: Mechanical, °C		420

Melting Onset (Solidus), °C		300
Melting Onset (Solidus), °C		1420

Specific Heat Capacity, J/kg-K		1000
Specific Heat Capacity, J/kg-K		470

Thermal Conductivity, W/m-K		0.25
Thermal Conductivity, W/m-K		42

Thermal Expansion, µm/m-K		120
Thermal Expansion, µm/m-K		13

Common Calculations

Strength to Weight: Axial, points		3.9
Strength to Weight: Axial, points		24 to 47

Strength to Weight: Bending, points		10
Strength to Weight: Bending, points		22 to 34

Thermal Diffusivity, mm²/s		0.12
Thermal Diffusivity, mm²/s		11

Elongation at Break, %		300
Elongation at Break, %		12 to 20

Tensile Strength: Ultimate (UTS), MPa		30
Tensile Strength: Ultimate (UTS), MPa		660 to 1310

Density, g/cm³		2.2
Density, g/cm³		7.8

PFA vs. SAE-AISI 4150 Steel

Mechanical Properties

Thermal Properties

Otherwise Unclassified Properties

Common Calculations

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