PEEK vs. PPS
Both PEEK and PPS are thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.
For each property being compared, the top bar is PEEK and the bottom bar is PPS.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 120 to 300 | |
| 95 to 160 |
| Elongation at Break, % | 1.6 to 43 | |
| 2.5 to 11 |
| Flexural Modulus, GPa | 3.8 to 19 | |
| 13 to 17 |
| Flexural Strength, MPa | 150 to 330 | |
| 120 to 190 |
| Impact Strength: Notched Izod, J/m | 78 to 120 | |
| 21 to 80 |
| Rockwell R Hardness | 120 | |
| 120 |
| Tensile Strength: Ultimate (UTS), MPa | 97 to 200 | |
| 75 to 190 |
Thermal Properties
| Glass Transition Temperature, °C | 240 | |
| 190 to 290 |
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 160 to 300 | |
| 130 to 260 |
| Specific Heat Capacity, J/kg-K | 1390 to 1700 | |
| 910 to 1000 |
| Thermal Expansion, µm/m-K | 15 to 52 | |
| 20 to 45 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 1.3 to 1.7 |
| Water Absorption At Saturation, % | 0.22 to 0.5 | |
| 0.060 to 0.1 |
Common Calculations
| Strength to Weight: Axial, points | 20 to 41 | |
| 16 to 37 |
| Strength to Weight: Bending, points | 36 to 55 | |
| 30 to 52 |