Engineering Plastic
PEEK
The high-performance polymer: metal-like strength, ~250 °C continuous service, and broad chemical resistance. Expensive; used where nothing cheaper survives.
Last verified: 2026-07-10
| PolymerChemistry / common trade name. | Polyether ether ketone |
|---|---|
| Density(g/cm³)Typical specific gravity. | 1.32 |
| Tensile(MPa)Typical tensile strength (unfilled grade). | 100 |
| Max service(°C)Typical continuous service temperature. | 250 |
| Water abs.(%)Typical 24 h water absorption. | 0.1 |
| Machinability | Good |
| Known forThe property it's usually chosen for. | High strength at high temperature |
- Typical uses: aerospace and semiconductor parts, high-temperature bushings and seals, medical and downhole components.
- Retains strength and stiffness near 250 °C; excellent chemical, wear, and fatigue resistance.
- High cost and machining tool wear; glass/carbon-filled grades raise stiffness further.
Other engineering plastics
Sources
- Manufacturer datasheets (typical properties for common unfilled grades)
- ASM International — Engineering Plastics (Engineered Materials Handbook)