TECAPEEK® natural polyetheretherketone

PEEK unfilled

Polyetheretherketone (PEEK) - TECAPEEK natural is a high performance, high temperature, semi crystalline thermoplastic manufactured by Ensinger and may use Victrex® PEEK 450G  or Solvay Ketaspire® KT-820 polymer. The most well known and important member of the polyaryletherketone group combines excellent wear, and very good mechanical properties, even under thermal load. Outstanding chemical resistance and a high operating temperature (up to 500°F) round out its profile, and make TECAPEEK an almost universally appropriate material for highly stressed parts. Its excellent dimensional stability combined with high creep stability, supports the suitability of PEEK for the most sophisticated machined parts.



Chemical designation
PEEK (Polyetheretherketone)
Alternative colors available
1,31 g/cm3

Main Features

  • made exclusively from Victrex® resin
  • excellent chemical resistance
  • high thermal resistance
  • good heat deflection temperature
  • good machinability
  • very good slide and wear properties
  • hydrolysis and superheated steam resistant

Target industries

Technical details

  • Mechanical properties
    Mechanical propertiesValueUnitConditionTest Method
    Tensile strength at yield16000psi@ 73 °FASTM D 638
    Modulus of elasticity
    (tensile test)
    650,000psi1% Sec, 73 °FASTM D 638
    Elongation at yield4.9%@ 73 °FASTM D 638
    Elongation at break30%@ 73 °FASTM D 638
    Flexural strength26,000psi@ 73 °FASTM D 790
    Modulus of elasticity
    (flexural test)
    600,000psi@ 73 °FASTM D 790
    Compression strength20,000psi@ 73 °FASTM D 695
    Notched impact strength (Izod)0.95ftlbsin@ 73 °FASTM D 256
    Rockwell hardness99lbs/in^2M ScaleASTM D 785
    Coefficient of friction0.20-@ 68 °FASTM D 3702
    Wear (K) factor200x 10-10in3minftlbshr40 psi, 50 fpmASTM D 3702
    Tensile strength at break8900psi@ 73 °FASTM D 638
    Compression modulus493,000psi@ 73 °FASTM D 695
    Coefficient of friction.25-@ 68 °F,ASTM D 3702
    Compression strength16,000psi@ 73 °FASTM D 695
    Compression strength3,400psi@ 73 °FASTM D 695
  • Thermal properties
    Thermal propertiesValueUnitConditionTest Method
    Deflection temperature320F@264 psiASTM D 648
    Service temperature480FLong Term-
    Melting temperature633F-
    Thermal expansion (CLTE)2.5*10^-5 in/in / degre< Tg, along fllowDIN EN ISO 11359-1;2
    Thermal conductivity2.01BTU-in/hr-ft^2 - degISO 22007-4:2008
    Service temperature572Fshort term-
  • Electrical properties
    Electrical propertiesValueUnitConditionTest Method
    Volume resistivity4.9*1016O*cm@ 73 °FASTM D 149
    surface resistivity1.0*1016Ohm/squareASTM D 257
    Dielectric strength630V/mil0.1" thick IEC 60243-1-
    Dielectric constant2.8-@ 73 °F, 1 kHzDIN IEC 60250
    Dissipation factor0.003-@ 73 °F, 1 MHzDIN IEC 60250
  • Other properties
    Other propertiesValueUnitConditionTest Method
    Flammability (UL94)V0--
    Moisture absorption0.02%@ 24 hrs, 73 °FASTM D 570
    Moisture absorption0.45%@ saturation, 73 °FDIN EN ISO 62
    Limiting PV69000psi-fpmASTM D 3702
    Flammabilitypass-3 mmFAR 25.853

Stock program