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AISI 316 Stainless Steel vs. PFA

AISI 316 stainless steel and PFA belong to fundamentally different material chemistries. AISI 316 stainless steel is a metal, while PFA is a polymeric material. 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 (35, 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 AISI 316 stainless steel and the bottom bar is PFA.

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, % 8.0 to 55
300
Tensile Strength: Ultimate (UTS), MPa 520 to 1180
30

Thermal Properties

Maximum Temperature: Mechanical, °C 590
260
Melting Onset (Solidus), °C 1380
300
Specific Heat Capacity, J/kg-K 470
1000
Thermal Conductivity, W/m-K 15
0.25
Thermal Expansion, µm/m-K 16
120

Otherwise Unclassified Properties

Density, g/cm3 7.9
2.2

Common Calculations

Strength to Weight: Axial, points 18 to 41
3.9
Strength to Weight: Bending, points 18 to 31
10
Thermal Diffusivity, mm2/s 4.1
0.12