PEEK vs. PSU
Both PEEK and PSU are thermoplastics. There are 13 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.
For each property being compared, the top bar is PEEK and the bottom bar is PSU.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 120 to 300 | |
| 95 to 180 |
| Elongation at Break, % | 1.6 to 43 | |
| 2.0 to 52 |
| Flexural Modulus, GPa | 3.8 to 19 | |
| 2.7 to 14 |
| Flexural Strength, MPa | 150 to 330 | |
| 110 to 200 |
| Impact Strength: Notched Izod, J/m | 78 to 120 | |
| 59 to 100 |
| Tensile Strength: Ultimate (UTS), MPa | 97 to 200 | |
| 70 to 140 |
Thermal Properties
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 160 to 300 | |
| 180 to 200 |
| Specific Heat Capacity, J/kg-K | 1390 to 1700 | |
| 910 to 1000 |
| Thermal Expansion, µm/m-K | 15 to 52 | |
| 25 to 57 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 1.2 to 1.6 |
| Water Absorption At Saturation, % | 0.22 to 0.5 | |
| 0.4 to 0.6 |
Common Calculations
| Strength to Weight: Axial, points | 20 to 41 | |
| 16 to 25 |
| Strength to Weight: Bending, points | 36 to 55 | |
| 30 to 40 |