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Material Information

PEEK is a high performance thermoplastic that is tough, strong, rigid, and creep resistant. It offers excellent thermal, chemical, and hydrolysis resistance as well as excellent resistance to abrasion and dynamic fatigue. Its ability to run at high continuous temperature (480º F) without permanent property loss and stable electrical properties makes PEEK a good alternative to fluoropolymers in hostile environments. PEEK has also been shown to exhibit very low smoke and toxic gas emission when exposed to flame. PEEK is available in unfilled, 30% glass filled, 30% carbon filled, and bearing grade (Ketron HPV). Bearing Grade PEEK has been reinforced with carbon fibers with graphite and PTFE lubricants. It offers the lowest coefficient of friction, and the best machinability of the PEEK grades. In addition to its low coefficient of friction, it also is low wear, high limiting PV, and has low mating part wear. Bearing Grade PEEK is available in sheet or rod in a black or dark.


  • Aircraft components
  • Wire and cable coatings
  • Automotive engine parts
  • Tearings
  • Woven monofilament
  • Film
  • Microwave applications
  • Pump and valve parts
  • Chemical processing
  • Electrical components and electronics
  • Semiconductor production
  • Industrial applications


  • Superior heat resistance and high temperature performance
  • High mechanical and electrical properties over wide range of temperatures
  • Outstanding chemical resistance
  • Resistance to high pressure steam
  • Resistance to gamma radiation
  • Very low moisture absorption
  • Good wear and abrasion resistance
  • Low smoke and toxic gas emission
  • Excellent flame retardance
  • Easy to fabricate


PhysicalAstm Test MethodPEEK (Bearing Grade)
Density (lb/in^3)D7920.052
Specific GravityD7921.44
Water Absorption @ 24 hours (%)D5700.05
Tensile Strength (PSI)D63811,000
Tensile Modulus (PSI)D638850,000
Tensile Elongation at Break (%)D6382
Flexural Strength (PSI)D79027,500
Flexural Modulus (PSI)D7901,100,000
Compressive Strength (PSI)D69526,700
Compressive Modulus (PSI)D6951,000,000
Izod Impact (Notched), ft-lb/inD2560.7
Rockwell HardnessD785M85
Coefficient of Thermal Expansion,
Heat Deflection Temperature 264 psi, ºFD648383
Melting Point, °FD3418
Continous Service Temp (Operating), °F482
Thermal Conductivity, BTU-in/hr-ft² °FC1771.7
Flammability RatingUL94VO
Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
Volume Resistivity (ohm-cm) @ 50% RHD25710^3
Dielectric Constant at 1 MHzD150
Dissipation Factor at 1 MHzD150

Disclosure: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.


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