Engineered for extremes
PTFE Carbon-graphite 25
Sample data. This grade shows how a Pascalor datasheet looks. The values are not measurements of a real product.
25 wt% carbon-graphite. Good wear in steam, water and dry running, and kinder to softer counterfaces than glass. A common compressor-ring grade.
- Polymer class
- PTFE
- Pole mark
- HPHT
- Filler
- Carbon-graphite 25 wt%
- Hardness
- 65 Shore D
- Temperature range
- -200 to 260 °C
- Lead time
- 4 to 6 weeks
- Minimum order
- 25 kg
- Issued
- 2026-10-28
- Revision
- A
- Packing
- Per order
Typical properties and release limits
| Property | Typical | Limits | Unit | Method |
|---|---|---|---|---|
| Filler content (total, by weight) | 25 | 23.5 to 26.5 | wt % | Ash or TGA |
| Specific gravity | 2.09 | 2.05 to 2.13 | g/cm³ | ASTM D792 |
| Tensile strength | 14 | min 11 | MPa | ASTM D4745 / D638 |
| Elongation at break | 130 | min 91 | % | ASTM D4745 / D638 |
| Hardness (Shore D) | 65 | 62 to 68 | Shore D | ASTM D2240 |
| Deformation under load | 4.5 | max 6 | % | ASTM D621, 6.9 MPa, 24 h, 23 °C |
| Coefficient of friction (dynamic) | 0.13 | max 0.17 | ASTM D3702, dry, steel counterface | |
| Specific wear rate | 0.45 | max 0.9 | 10⁻⁶ mm³/(N·m) | ASTM D3702, dry, steel counterface |
| PV limit | 0.5 | min 0.4 | MPa·m/s | Dry sliding, steel counterface |
| Thermal conductivity | 0.55 | min 0.5 | W/(m·K) | ISO 22007-2 |
| Linear thermal expansion | 95 | max 105 | 10⁻⁶ /K | ASTM E831, 23 to 100 °C |
Typical values are mean results on compression-moulded and sintered test plaques made in the laboratory unless a method says otherwise. Properties of a finished part depend on the moulding or ram-extrusion route, the sintering cycle and the direction of flow. Limits apply to lot release. They are not a warranty of fitness for a particular use. Confirm suitability on your own counterface, fluid and temperature.
Every lot is supplied with a certificate of analysis. Enter the lot ID under Track on the website to see the lot record. Pascalor is an independent brand and is not affiliated with any polymer manufacturer named elsewhere on this site.
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