Thermoplastic comparison
PEEK vs PTFE (Teflon)
Every value below is a typical room-temperature figure with its source, test method and conditions — the same dataset that drives the calculators.
| Property | PEEK | PTFE (Teflon) | Difference |
|---|---|---|---|
| Density | 1.3 g/cm³ | 2.17 g/cm³ | PTFE (Teflon) — 67% higher |
| Young's modulus E | 3.6 GPa | 0.5 GPa | PEEK — 7.2× higher |
| Tensile strength | 100 MPa | 24 MPa | PEEK — 4.2× higher |
| Melting point Tm | 343 °C | 327 °C | PEEK — 16 °C higher |
Where these numbers come from
- Callister & Rethwisch, Materials Science and Engineering, 10th ed.
Typical room-temperature values for learning and preliminary design; grades vary widely and a supplier datasheet always overrides a textbook figure. Confirm against the datasheet before design work.