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AISI 304 Stainless Steel vs. Spruce-pine-fir

AISI 304 stainless steel and spruce-pine-fir belong to fundamentally different material chemistries. AISI 304 stainless steel is a metal, while spruce-pine-fir 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 (22, 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 304 stainless steel and the bottom bar is spruce-pine-fir.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
16
Elongation at Break, % 8.0 to 43
1.5
Poisson's Ratio 0.28
0.38
Shear Modulus, GPa 77
1.2
Tensile Strength: Ultimate (UTS), MPa 580 to 1180
85

Thermal Properties

Maximum Temperature: Mechanical, °C 710
130
Specific Heat Capacity, J/kg-K 480
1380
Thermal Conductivity, W/m-K 16
0.12
Thermal Expansion, µm/m-K 17
6.5

Otherwise Unclassified Properties

Density, g/cm3 7.8
0.5

Common Calculations

Stiffness to Weight: Axial, points 14
18
Strength to Weight: Axial, points 21 to 42
47
Strength to Weight: Bending, points 20 to 32
86
Thermal Diffusivity, mm2/s 4.2
0.17
Thermal Shock Resistance, points 12 to 25
58