Polyetherketone (PEK)

Polyetherketone (PEK) is a high temperature semi crystalline thermoplastic that is a member of the polyaryletherketone (PAEK) family. It differs chemically by the respective number of cohesive ether and ketone groups that are present in the material's molecular structure. PEK is manufactured by Ensinger under the trade name TECAPEEK HT black, using VICTREX HT™ PEK polymer. PEK polymers offer higher wear resistance, as well as improved compressive strength at higher temperatures. A higher heat deflection temperature than standard PEEK allows for the mechanical properties and physical characteristics of TECAPEEK HT to be maintained at temperatures that are up to 30°C higher than standard PEEK.


Chemical designation
PEK (Polyetherketone)
1,31 g/cm3

Main Features

  • good wear resistance
  • high thermal and mechanical capacity
  • good chemical resistance
  • inherent flame retardant
  • very good slide and wear properties
  • electrically insulating
  • high creep resistance
  • resistance against high energy radiation

Target industries

Technical details

  • Mechanical properties
    Mechanical propertiesValueUnitParameterNorm
    Tensile strength120MPa50mm/minDIN EN ISO 527-2
    Tensile strength at yield120MPa50mm/minDIN EN ISO 527-2
    Elongation at yield4%50mm/minDIN EN ISO 527-2
    Elongation at break (tensile test)5%50mm/minDIN EN ISO 527-2
    Flexural strength192MPa2mm/min, 10 NDIN EN ISO 178
    Modulus of elasticity
    (flexural test)
    4600MPa2mm/min, 10 NDIN EN ISO 178
    Compression strength25/45/100MPa1% / 2% / 5%EN ISO 604
    Compression modulus3500MPa5mm/min, 10 NEN ISO 604
    Impact strength (Charpy)n.b.kJ/m2max. 7,5JDIN EN ISO 179-1eU
    Notched impact strength (Charpy)4kJ/m2max. 7,5JDIN EN ISO 179-1eA
    Ball indentation hardness282MPaISO 2039-1
    Modulus of elasticity
    (tensile test)
    4600MPa1mm/minDIN EN ISO 527-2
  • Thermal properties
    Thermal propertiesValueUnitParameterNorm
    Melting temperature375CDIN EN ISO 11357
    Service temperature300Cshort termNN
    Service temperature260Clong termNN
    Thermal expansion (CLTE)510-5*1/K23-60°C, long.DIN EN ISO 11359-1;2
    Thermal expansion (CLTE)510-5*1/K23-100°C, long.DIN EN ISO 11359-1;2
    Glass transition temperature160CDIN EN ISO 11357
    Thermal expansion (CLTE)610-5*1/K100-150°C, long.DIN EN ISO 11359-1;2
  • Electrical properties
    Electrical propertiesValueUnitParameterNorm
    volume resistivity1014O*cmSilver electrode, 23°C, 12% r.h.DIN IEC 60093
    Dielectric strength62kV/mm23°C, 50% r.h.ISO 60243-1
    surface resistivity1014OSilver electrode, 23°C, 12% r.h.DIN IEC 60093
    Resistance to tracking (CTI)200VPlatin electrode, 23°C, 50% r.h., solvent ADIN EN 60112
  • Other properties
    Other propertiesValueUnitParameterNorm
    Resistance to hot water/ bases+--
    Resistance to weathering(+)--
    Water absorption0.04%24h / 96h (23°C)DIN EN ISO 62
    Flammability (UL94)V0-corresponding toDIN IEC 60695-11-10;

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