TECAPEEK natural

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‘s 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 260°C) 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. Ensinger manufactures PEEK plastics in various shapes such as PEEK rod, PEEK plate and PEEK tube.



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

Main Features

  • good heat deflection temperature
  • good machinability
  • inherent flame retardant
  • resistance against high energy radiation
  • good slide and wear properties
  • high creep resistance
  • very good chemical resistance
  • hydrolysis and superheated steam resistant

Target industries

Technical details

  • Mechanical properties
    Mechanical propertiesValueUnitParameterNorm
    Modulus of elasticity
    (tensile test)
    4200MPa1mm/minDIN EN ISO 527-2
    Tensile strength116MPa50mm/minDIN EN ISO 527-2
    Tensile strength at yield116MPa50mm/minDIN EN ISO 527-2
    Elongation at yield5%50mm/minDIN EN ISO 527-2
    Elongation at break (tensile test)15%50mm/minDIN EN ISO 527-2
    Flexural strength175MPa2mm/min, 10 NDIN EN ISO 178
    Modulus of elasticity
    (flexural test)
    4200MPa2mm/min, 10 NDIN EN ISO 178
    Compression strength23/43/102MPa1% / 2% / 5%EN ISO 604
    Compression modulus3400MPa5mm/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 hardness253MPaISO 2039-1
  • Thermal properties
    Thermal propertiesValueUnitParameterNorm
    Glass transition temperature150CDIN 53765
    Melting temperature341CDIN 53765
    Heat distortion temperature162CHDT, Method AISO-R 75 Method A
    Service temperature300Cshort termNN
    Service temperature260Clong term-
    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
    Thermal conductivity0.27W/(k*m)ISO 22007-4:2008
    Specific heat1.1J/(g*K)ISO 22007-4:2008
    Thermal expansion (CLTE)710-5*1/K100-150°C, long.DIN EN ISO 11359-1;2
  • Electrical properties
    Electrical propertiesValueUnitParameterNorm
    surface resistivity1015OSilver electrode, 23°C, 12% r.h.DIN IEC 60093
    volume resistivity1015O*cmSilver electrode, 23°C, 12% r.h.DIN IEC 60093
    Dielectric strength73kV/mm23°C, 50% r.h.ISO 60243-1
    Resistance to tracking (CTI)125VPlatin electrode, 23°C, 50% r.h., solvent ADIN EN 60112
  • Other properties
    Other propertiesValueUnitParameterNorm
    Resistance to hot water/ bases+-
    Flammability (UL94)V0listed (value at 1.5mm)DIN IEC 60695-11-10;
    Resistance to weathering--
    Water absorption0.03%24h / 96h (23°C)DIN EN ISO 62

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