PEEK vs. PC
Both PEEK and PC 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 PC.
Metric UnitsUS Customary Units
Mechanical Properties
| Elongation at Break, % | 1.6 to 43 | |
| 3.5 to 110 |
| Flexural Modulus, GPa | 3.8 to 19 | |
| 2.3 to 10 |
| Flexural Strength, MPa | 150 to 330 | |
| 92 to 160 |
| Impact Strength: Notched Izod, J/m | 78 to 120 | |
| 140 to 440 |
| Tensile Strength: Ultimate (UTS), MPa | 97 to 200 | |
| 66 to 160 |
Thermal Properties
| Glass Transition Temperature, °C | 240 | |
| 150 |
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 160 to 300 | |
| 130 to 150 |
| Specific Heat Capacity, J/kg-K | 1390 to 1700 | |
| 1000 to 1200 |
| Thermal Expansion, µm/m-K | 15 to 52 | |
| 10 to 69 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 1.2 to 1.4 |
| Water Absorption At Saturation, % | 0.22 to 0.5 | |
| 0.16 to 0.19 |
Common Calculations
| Strength to Weight: Axial, points | 20 to 41 | |
| 15 to 30 |
| Strength to Weight: Bending, points | 36 to 55 | |
| 30 to 45 |