PEEK
PEEK (Polyetheretherketone) – High-Performance Thermoplastic for Extreme Service Conditions
PEEK (polyetheretherketone) is the premier high-performance engineering thermoplastic, offering continuous service temperatures up to 250°C, exceptional chemical resistance, inherent flame retardancy, and mechanical properties approaching those of aluminum at less than one-quarter the weight. It is the leading specification for replacing metal in weight-critical aerospace, medical, and oil-and-gas applications.
Key Properties
- Tensile Strength: 100 MPa
- Continuous Service Temperature: 250°C
- Density: 1.32 g/cm³
- Chemical Resistance: Excellent — resistant to most solvents and acids
- Flame Retardancy: Inherent (UL94 V-0)
- Standard: ASTM D638
Common Applications
Aerospace structural brackets and clips, medical implants and surgical instruments, oil-and-gas downhole seals, semiconductor handling components, and high-temperature bearing cages replacing metal in weight-sensitive assemblies.
Material properties
| Material name | PEEK |
|---|---|
| Type | Plastics |
| Standard code | ASTM D638 |
| Tensile strength (MPa) | 100 |
| Yield strength (MPa) | 91 |
| Fatigue strength (MPa) | 50 |
| Elongation (%) | 30 |
| Hardness (Brinell) | — |
| Density (g/cm³) | 1.32 |
| Electrical resistivity (µΩ·in) | — |
| Thermal conductivity (W/m·K) | 0.3 |
| Melting range (°C) | 343 |
| Weldability | N/A |
| Formability | Fair |
| Shear modulus | 3.6 |
| Industry code | peek |