PEEK (Polyether Ether Ketone) is a high-performance engineering polymer offering exceptional mechanical strength, outstanding thermal resistance, excellent chemical stability and superior dimensional accuracy. It performs reliably in high temperatures, aggressive chemical environments and extreme operating conditions, making it a premium choice for precision industrial, sealing, load-bearing and CNC-machined components in oil & gas, medical and advanced engineering applications.
What is PEEK (Polyether Ether Ketone)?
PEEK (Polyether Ether Ketone) is a high-performance semi-crystalline thermoplastic
classified among the most advanced engineering polymers available today.
It is valued for its combination of
exceptional mechanical strength, outstanding thermal resistance,
excellent chemical stability and superior dimensional accuracy.
PEEK is widely used in critical industries such as oil and gas, aerospace,
medical devices, electronics, food processing and precision mechanical engineering.
It is one of the few polymers capable of replacing metals in extremely demanding
operating conditions involving high temperature, pressure, continuous loading
and aggressive chemical exposure.
Key Engineering Advantages of PEEK
1. Exceptional Thermal Resistance (up to 260°C)
PEEK maintains its mechanical properties and dimensional stability
at continuous service temperatures up to 260°C,
making it ideal for high-temperature industrial applications.
2. Very High Mechanical Strength
PEEK is among the strongest engineering polymers available and
can replace metal alloys in many structural and load-bearing applications.
3. Excellent Chemical Resistance
PEEK is resistant to most acids, alkalis, solvents, fuels, oils
and aggressive industrial chemicals.
4. Outstanding Dimensional Stability
Minimal thermal expansion and moisture absorption make PEEK
ideal for tight-tolerance CNC-machined components.
5. High Wear and Fatigue Resistance
PEEK offers long service life in sliding, rotating and wear-intensive applications.
6. Biocompatibility
Medical-grade PEEK is suitable for implants, prosthetics
and medical equipment applications.
Industrial Applications of PEEK
- Precision components for oil, gas and petrochemical industries
- Aerospace parts and high-performance mechanical components
- Bearings, bushings, rings and wear-resistant parts
- High-load precision gears
- Tight-tolerance CNC-machined components
- Medical and biocompatible components
- High-temperature and chemically resistant parts
PEEK Compared to Other Engineering Polymers
| Property | PEEK | PA6G | POM | PTFE |
|---|---|---|---|---|
| Mechanical strength | Very high | High | Medium | Low |
| Thermal resistance | Excellent (260°C) | Medium | Medium | Excellent |
| Chemical resistance | Excellent | Good | Medium | Excellent |
| CNC machinability | Excellent | Good | Excellent | Medium |
| Dimensional stability | Excellent | Good | Medium | Low |
| Cost | Very high | Medium | Low | High |
Key Considerations When Selecting PEEK
- PEEK is the best polymer choice for extremely high temperature and pressure applications.
- In aggressive chemical environments, it offers PTFE-level resistance with much higher strength.
- For precision CNC components, PEEK’s dimensional stability is critical.
- In wear-resistant applications, PEEK outperforms POM and PA6G.
Typical Technical Properties of PEEK
| Property | Typical Value |
|---|---|
| Density | 1.30 – 1.32 g/cm³ |
| Hardness (Shore D) | 85 – 90 |
| Operating temperature | -50 to +260°C |
| Tensile strength | 90 – 100 MPa |
| Chemical resistance | Excellent |
Frequently Asked Questions about PEEK
Can PEEK replace metal components?
Yes. In many high-performance applications, PEEK can replace metal alloys
while offering lower weight and superior chemical resistance.
Is PEEK better than PTFE?
PEEK offers significantly higher mechanical strength,
while PTFE provides superior chemical inertness and lower friction.
Is PEEK suitable for CNC machining?
Yes. PEEK is one of the best polymers for precision CNC machining.