PEEK, 30% glass filled
Polyetheretherketone
Glass-reinforced PEEK for higher stiffness and dimensional stability under load.
Adding 30% glass fiber to PEEK raises stiffness and reduces creep at elevated temperature, at the cost of some toughness and machined surface finish. It's the grade to reach for when a part needs to hold shape under sustained mechanical or thermal load.
Specs
- Density
- 0.0546 lb/in³
- Stock thicknesses
- 0.25, 0.5, 0.75, 1 in
- Sheet size
- 48 x 24 in
- Brands available
- Ensinger TECAPEEK GF30, Mitsubishi Ketron GF30
Price depends on size, quantity, tolerance and finish - get an exact number for this material in seconds.
Handling notice
- PEEK, 30% glass filled carries residual stress from how the plate was made. Cutting it free lets that stress release, and a 12x12 blank can bow 0.010-0.025 in within 48 hours. Stress-relief annealing is available at quote time.
Why this material
Choose glass-filled PEEK over natural PEEK when stiffness and dimensional stability under heat matter more than surface finish or machinability. For wear and friction applications, carbon-filled PEEK is usually the better fit.
Typical applications
- Structural components under continuous mechanical load
- Precision parts that must resist creep at elevated temperature
- Electrical connector bodies and insulators
- Pump and compressor components exposed to heat and pressure
Handling notes
- Glass fiber is abrasive to standard tooling; expect faster blade wear than natural PEEK.
Questions
Is PEEK GF30 stronger than natural PEEK?
It's stiffer and creeps less under sustained load at temperature, but natural PEEK is tougher and machines to a cleaner edge. Which is 'stronger' depends on whether your failure mode is deflection or impact.
Can I get a tight edge finish on glass-filled PEEK?
Glass fiber at the cut edge is more abrasive and slightly rougher than natural PEEK's edge. A scraped or chamfered finish holds up well; a mirror finish isn't realistic on this grade.
Does glass-filled PEEK carry the same residual stress as natural PEEK?
Yes - see the residual stress note above. The reinforcement doesn't change how the plate was extruded.
Related materials
PEEK, natural (unfilled)
Polyetheretherketone
Metal-replacement performance in a machinable thermoplastic.
PEEK, 30% carbon filled
Polyetheretherketone
Carbon-reinforced PEEK for wear resistance and electrical conductivity.