VMQ
Material 50D7
Hot air, weathering, dielectric applications.
Properties
| Family | VMQ |
|---|---|
| Standard | NF EN 2261 / NF L 17-250 |
| Nominal hardness | 70 Shore A |
| Measured IRHD hardness | 69 |
| Continuous service temperature | −55 to +225 °C |
| Short-term temperature | −55 to +260 °C |
| Storage group | IV |
Properties measured at qualification
Qualification tests of compound 50D7 to NF L 17-250, carried out by an independent test laboratory. “—”: measured value with no requirement in the standard.
| Property | Requirement | Measured |
|---|---|---|
| Initial state | ||
| Hardness IRHD (°) | 66-75 | 69 |
| Hardness Shore A (points) | 70 | 66 |
| Tensile strength (MPa) | ≥5 | 5.5 |
| Elongation at break (%) | ≥150 | 203 |
| Stress at 100 % elongation (MPa) | — | 3.0 |
| Tear strength (kN/m) | ≥8 | 10 |
| Density (Mg/m³) | ±0.02 between deliveries | 1.29 |
| Colour | — | Red |
| Lubricant immersion — 70 h at 150 °C in IRM 901 | ||
| Change in IRHD hardness (°) | -10 to 0 | -8 |
| Max. change in tensile strength (%) | -20 | -10.9 |
| Max. change in elongation at break (%) | -15 | -13.8 |
| Change in volume (%) | 0 to +10 | 5.5 |
| Lubricant immersion — 70 h at 150 °C in fluid 101 | ||
| Change in volume (%) | 0 to 35 | 34.1 |
| Heat ageing — 70 h at 225 °C in air | ||
| Change in IRHD hardness (°) | ±10 | -1 |
| Max. change in tensile strength (%) | -25 | 3.6 |
| Max. change in elongation at break (%) | -40 | -10.8 |
| Compression set | ||
| After 70 h at 150 °C in air (%) | ≤40 | 11.2 |
| Temperature retraction | ||
| Initial state — TR 10 (°C) | ≤-40 | -41.4 |
O-rings in this material in the catalogue
13 references · sorted by inside diameter.