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Spruce-pine-fir vs. CAB

Spruce-pine-fir belongs to the wood-based materials classification, while CAB belongs to the thermoplastics. There are 11 material properties with values for both materials. Properties with values for just one material (19, 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 spruce-pine-fir and the bottom bar is CAB.

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, % 1.5
50 to 55
Tensile Strength: Ultimate (UTS), MPa 85
20 to 50

Thermal Properties

Specific Heat Capacity, J/kg-K 1380
1460
Thermal Conductivity, W/m-K 0.12
0.25
Thermal Expansion, µm/m-K 6.5
14

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 0.5
15

Otherwise Unclassified Properties

Density, g/cm3 0.5
1.2
Limiting Oxygen Index (LOI), % 24
18

Common Calculations

Strength to Weight: Axial, points 47
4.8 to 12
Strength to Weight: Bending, points 86
14 to 25
Thermal Diffusivity, mm2/s 0.17
0.14 to 0.15