Hardwood vs. PEI
Hardwood belongs to the wood-based materials classification, while PEI belongs to the thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.
For each property being compared, the top bar is hardwood and the bottom bar is PEI.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 40 | |
| 140 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 12 | |
| 3.4 to 5.6 |
| Elongation at Break, % | 2.0 | |
| 3.0 to 34 |
| Tensile Strength: Ultimate (UTS), MPa | 80 | |
| 110 to 160 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 1260 | |
| 1050 to 1220 |
| Thermal Conductivity, W/m-K | 0.16 | |
| 0.18 to 0.23 |
| Thermal Expansion, µm/m-K | 6.0 | |
| 20 to 53 |
Electrical Properties
| Dielectric Strength (Breakdown Potential), kV/mm | 0.5 | |
| 30 to 33 |
Otherwise Unclassified Properties
| Density, g/cm3 | 0.7 | |
| 1.3 to 1.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 9.5 | |
| 1.5 to 2.1 |
| Stiffness to Weight: Bending, points | 110 | |
| 39 |
| Strength to Weight: Axial, points | 32 | |
| 24 to 30 |
| Strength to Weight: Bending, points | 59 | |
| 40 to 44 |
| Thermal Diffusivity, mm2/s | 0.18 | |
| 0.11 to 0.14 |
| Thermal Shock Resistance, points | 79 | |
| 44 to 100 |