PEI vs. PSU
Both PEI and PSU are thermoplastics. There are 14 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.
For each property being compared, the top bar is PEI and the bottom bar is PSU.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 140 to 180 | |
| 95 to 180 |
| Elongation at Break, % | 3.0 to 34 | |
| 2.0 to 52 |
| Flexural Modulus, GPa | 3.4 to 5.9 | |
| 2.7 to 14 |
| Flexural Strength, MPa | 140 to 210 | |
| 110 to 200 |
| Impact Strength: Notched Izod, J/m | 55 to 110 | |
| 59 to 100 |
| Rockwell M Hardness | 110 to 130 | |
| 69 to 95 |
| Tensile Strength: Ultimate (UTS), MPa | 110 to 160 | |
| 70 to 140 |
Thermal Properties
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 200 to 210 | |
| 180 to 200 |
| Specific Heat Capacity, J/kg-K | 1050 to 1220 | |
| 910 to 1000 |
| Thermal Expansion, µm/m-K | 20 to 53 | |
| 25 to 57 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 1.2 to 1.6 |
| Water Absorption At Saturation, % | 0.9 to 1.3 | |
| 0.4 to 0.6 |
Common Calculations
| Strength to Weight: Axial, points | 24 to 30 | |
| 16 to 25 |
| Strength to Weight: Bending, points | 40 to 44 | |
| 30 to 40 |