PTFE (Teflon) properties
PTFE, known by the brand Teflon, has the lowest friction of any solid and outstanding chemical and heat resistance. It is nearly inert and works across an enormous temperature range, though it is soft and creeps under load.
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength | 3,500 psi (24 MPa) |
| Flexural modulus | 90,000 psi (0.62 GPa) |
| Elongation at break | 300% |
| Hardness | Shore D 55 |
Physical properties
| Property | Value |
|---|---|
| Density | 0.078 lb/in³ (2170 kg/m³) |
| Melting point | about 327 °C |
Thermal properties
| Property | Value |
|---|---|
| Max service temperature | about 260 °C continuous |
| Thermal expansion | 135 µm/m·°C |
| Thermal conductivity | 0.25 W/m·K |
Values are typical for the grade and condition shown. Actual properties vary with temper, heat treatment, and product form, so use these for comparison and preliminary design and confirm against material certificates for final work.
Compare with other materials
See the Material Properties Comparison, Yield Strength, and Density charts.
Typical uses
PTFE is used for non-stick coatings, seals, gaskets, bearings, chemical-resistant linings, and electrical insulation. Its near-zero friction, chemical inertness, and wide temperature range suit the harshest sealing and low-friction jobs that defeat other plastics.
How it compares
PTFE is unmatched for low friction, chemical inertness, and temperature range, far beyond any other common plastic, but it is soft, weak, and creeps under sustained load. It is chosen for sealing, sliding, and chemical service, not for structural strength.
FAQ
Why is PTFE so slippery?
Its fluorine surface gives the lowest coefficient of friction of any solid material, so almost nothing sticks to it and it slides freely.
What temperature can PTFE handle?
Continuous service to about 260 C, with a melting point near 327 C, far higher than most plastics, plus excellent low-temperature behavior.
Is PTFE strong?
No. It is soft and low in strength and creeps under load, so it is used for sealing and low-friction surfaces rather than structural parts.