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Spruce-pine-fir vs. Hardwood

Both spruce-pine-fir and hardwood are wood-based materials. There are 16 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is spruce-pine-fir and the bottom bar is hardwood.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 50
40
Elastic (Young's, Tensile) Modulus, GPa 16
12
Elongation at Break, % 1.5
2.0
Poisson's Ratio 0.38
0.37
Shear Modulus, GPa 1.2
0.9
Tensile Strength: Ultimate (UTS), MPa 85
80

Thermal Properties

Specific Heat Capacity, J/kg-K 1380
1260
Thermal Conductivity, W/m-K 0.12
0.16
Thermal Expansion, µm/m-K 6.5
6.0

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 0.5
0.5

Otherwise Unclassified Properties

Density, g/cm3 0.5
0.7

Common Calculations

Stiffness to Weight: Axial, points 18
9.5
Strength to Weight: Axial, points 47
32
Strength to Weight: Bending, points 86
59
Thermal Diffusivity, mm2/s 0.17
0.18
Thermal Shock Resistance, points 58
79