Vespel SP-21 — Properties, Datasheet & Alternatives
DuPont · PI · 15% graphite-filled polyimide for self-lubricating bearings; Mineral Filled
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| Density | 1.51 g/cm³ |
| Melt Volume Rate (MVR) | no data |
| Tensile Strength | 58 MPa |
| Elongation at Break | 3 % |
| Flexural Modulus | no data |
| Impact Strength (Charpy) | no data |
| HDT (1.8 MPa) | 360 °C |
| Vicat Softening Temp | no data |
| Processing | direct forming, machining |
Typical Applications
- unlubricated bearings
- thrust washers
- aerospace seals
Data compiled from publicly available technical datasheets. Values are typical, not guaranteed specifications. Always verify with the supplier's current TDS.