PTFE vs. PEEK
Both PTFE and PEEK are thermoplastics. There are 16 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 PTFE and the bottom bar is PEEK.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 6.9 to 24 | |
| 120 to 300 |
| Elongation at Break, % | 75 to 300 | |
| 1.6 to 43 |
| Flexural Modulus, GPa | 0.4 to 1.3 | |
| 3.8 to 19 |
| Flexural Strength, MPa | 13 to 50 | |
| 150 to 330 |
| Tensile Strength: Ultimate (UTS), MPa | 13 to 25 | |
| 97 to 200 |
Thermal Properties
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 66 to 70 | |
| 160 to 300 |
| Maximum Temperature: Mechanical, °C | 260 to 270 | |
| 330 |
| Melting Onset (Solidus), °C | 330 to 340 | |
| 340 |
| Thermal Conductivity, W/m-K | 0.24 to 0.65 | |
| 0.25 to 0.93 |
| Thermal Expansion, µm/m-K | 110 to 120 | |
| 15 to 52 |
Electrical Properties
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 2.0 to 18 | |
| 3.0 to 14 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.1 to 2.3 | |
| 1.3 to 1.5 |
| Limiting Oxygen Index (LOI), % | 90 | |
| 38 |
| Water Absorption After 24 Hours, % | 0.0093 to 0.050 | |
| 0.060 to 0.3 |
Common Calculations
| Strength to Weight: Axial, points | 1.7 to 3.2 | |
| 20 to 41 |
| Strength to Weight: Bending, points | 5.7 to 8.7 | |
| 36 to 55 |