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).

Unfilled PEEK is an unreinforced grade that offers the highest toughness of all PEEK grades. It complies with FDA regulation for repeated food contact and is available in sheet and rod. Unfilled PEEK is also available in a natural color or black.


  • 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

Typical Properties of PEEK (Extruded)


Astm Test Method

PEEK (Unfilled)

Density (lb/in^3) D792 0.047
Specific Gravity D792 1.31
Water Absorption @ 24 hours (%) D570 0.1


Tensile Strength (PSI) D638 16,000
Tensile Modulus (PSI) D638 500,000
Tensile Elongation at Break (%) D638 20
Flexural Strength (PSI) D790 25,000
Flexural Modulus (PSI) D790 600,000
Compressive Strength (PSI) D695 20,000
Compressive Modulus (PSI) D695 500,000
Izod Impact (Notched), ft-lb/in D256 1
Rockwell Hardness D785 M100, R126


Coefficient of Thermal Expansion,
D696 2.6
Heat Deflection Temperature 264 psi, ºF D648 320
Melting Point, °F D3418 644
Continous Service Temp (Operating), °F  – 480
Thermal Conductivity, BTU-in/hr-ft² °F C177 1.75
Flammability Rating UL94 VO


Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
D149 480
Volume Resistivity (ohm-cm) @ 50% RH D257 4.90 x 10^16
Dielectric Constant at 1 MHz D150 3.3
Dissipation Factor at 1 MHz D150 0.003


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.