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PS vs. Spruce-pine-fir

PS belongs to the thermoplastics classification, while spruce-pine-fir belongs to the wood-based materials. There are 16 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 1.9 to 2.9
16
Elongation at Break, % 1.8 to 40
1.5
Poisson's Ratio 0.4 to 0.41
0.38
Tensile Strength: Ultimate (UTS), MPa 32 to 44
85

Thermal Properties

Maximum Temperature: Mechanical, °C 70
130
Specific Heat Capacity, J/kg-K 1250 to 1400
1380
Thermal Conductivity, W/m-K 0.14 to 0.22
0.12
Thermal Expansion, µm/m-K 80 to 98
6.5

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 18 to 20
0.5

Otherwise Unclassified Properties

Density, g/cm3 1.0
0.5
Limiting Oxygen Index (LOI), % 18
24

Common Calculations

Stiffness to Weight: Axial, points 1.0 to 1.5
18
Strength to Weight: Axial, points 8.5 to 12
47
Strength to Weight: Bending, points 22 to 26
86
Thermal Diffusivity, mm2/s 0.11 to 0.15
0.17
Thermal Shock Resistance, points 11 to 15
58