Engineering plastic
PEEK
Polyether ether ketone
A high-performance plastic for heat, chemicals, wear and metal-replacement applications.
01 · QUICK ANSWER
When should you choose PEEK?
Use unfilled PEEK for balanced performance and clean machining. Carbon- or glass-filled grades raise stiffness but also increase tool wear and directional behavior.
02 · SELECTION DATA
Typical properties at a glance
Screening values only. Final design data must follow the exact grade, condition, stock form and supplier certificate.
Density1.30–1.51 g/cm³
Strength range90–140 MPa tensile
TemperatureContinuous use near 250°C
MachinabilityGood
03 · ENGINEERING NOTES
Specify what changes the result
A material name alone is not enough. Include grade, condition, finish and documentation on the drawing or purchase specification.
- Unfilled PEEK
- 30% glass-filled PEEK
- 30% carbon-filled PEEK
- Bearing-grade PEEK
- Semiconductor fixtures
- Medical components
- High-temperature seals
- Aerospace insulators
- Raw material is expensive
- Annealing may be needed for stable tight tolerances
- Filled grades are abrasive
- As machined
- Polish
- Laser mark
- Controlled deburr
04 · MANUFACTURING FIT
Available process routes
CNC machiningCommonly available
Sheet metalReview by grade and geometry
3D printingCommonly available
05 · NEXT COMPARISON