FPM / FKM
Material 60C7
Oils, fuels and some diester lubricants.
Properties
| Family | FPM / FKM |
|---|---|
| Standard | NF L 17-260 |
| Nominal hardness | 75 Shore A |
| Measured IRHD hardness | 80 |
| Continuous service temperature | −20 to +200 °C |
| Short-term temperature | −20 to +260 °C |
| Storage group | V |
Properties measured at qualification
Qualification tests of compound 60C7 to NF L 17-260, carried out by an independent test laboratory. “—”: measured value with no requirement in the standard.
| Property | Requirement | Measured |
|---|---|---|
| Initial state | ||
| Hardness IRHD (°) | 71 to 80 | 80 |
| Hardness Shore A (points) | 75±5 | 80 |
| Tensile strength (MPa) | ≥13 | 18.4 |
| Elongation at break (%) | ≥175 | 193 |
| Modulus at 100 % (MPa) | — | 8.8 |
| Tear strength (kN/m) | — | 28 |
| Density (Mg/m³) | ±0.03 between deliveries | 1.86 |
| Fuel immersion — 70 h at 23 °C in solvent B | ||
| Change in IRHD hardness (°) | -5 to 5 | -1 |
| Max. change in tensile strength (%) | -15 | -7.6 |
| Max. change in elongation (%) | -15 | 2.6 |
| Change in volume (%) | 0 to 5 | 2 |
| Lubricant immersion — 70 h at 200 °C in fluid 101 | ||
| Change in IRHD hardness (°) | -15 to 5 | -12 |
| Max. change in tensile strength (%) | -30 | -8.7 |
| Max. change in elongation (%) | -20 | 17.6 |
| Change in volume (%) | 0 to 20 | 12.4 |
| Heat ageing — 70 h at 250 °C in air | ||
| Change in IRHD hardness (°) | 0 to 10 | 0 |
| Max. change in tensile strength (%) | -35 | -3.3 |
| Max. change in elongation (%) | -35 | -3.6 |
| Max. change in mass (%) | -5 | -2.5 |
| Compression set | ||
| After 70 h at 200 °C in air (%) | ≤35 | 20.7 |
| Temperature retraction (TR 10) | ||
| Initial state (°C) | ≤-15 | -16.8 |
O-rings in this material in the catalogue
48 references · sorted by inside diameter.