Plastics, Engineering PlasticsPEEK Bar

A high performance plastic material with one of the highest levels of heat resistance and mechanical strength available among plastics.

PEEK is an outstanding advanced material for demanding applications where excellent mechanical performance under extreme conditions is a pre-requisite. It is a unique semi crystalline, engineering thermoplastic that also offers excellent chemical compatibility.

Parts manufactured from high temperature plastic PEEK polymer can also operate at temperatures up to 260°C (480°F) and have a melting point around 341°C (646°F). PEEK plastic is often used in hot water or steam environments because it maintains physical properties such as flexural and tensile strength at a high level despite the severe environment. Polyetheretherketone is often viewed as one of the engineering thermoplastics that tends to command a high price, however experienced users have come to realise the added value that PEEK materials bring by offering the possibility of manufactured parts that are lighter, stronger and able to survive longer periods under harsh conditions.

PEEK is an extremely tough, wear resistant plastic with excellent resistance to high temperatures and energy radiation. It is very dimensionally stable and has a high mechanical bearing strength. PEEK rod also offers excellent chemical resistance and a high resistance to hydrolysis, even against super-heated steam. It is also electrically insulating, has good sliding properties and is easily machined. PEEK can be used for thousands of hours at high temperature in steam or high pressure water environments while showing no significant degradation. Radiation resistance is also exceptional. During combustion, the levels of smoke and toxic acid gas released are the lowest of any thermoplastic.

PEEK has a wide operating range of -60°C to +250°C and is insoluble in all common solvents and has excellent resistance to a very wide range of organic and inorganic liquids, even at higher temperatures.

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Product FormSize Range
Round Bar 4.0mm - 200.0mm
If you do not see what you are looking for, please contact your local service centre with your specific requirements.


Properties below are for natural bar.

PropertyParameterTest MethodValue
Mechanical Properties
Modulus of Elasticity1mm/minDIN EN ISO 527-24200 MPa
Compression Modulus5mm/minEN ISO 6043400 MPa
Ball Indentation HardnessEN 2039-1253 MPa
Tensile Strength50mm/minDIN EN ISO 527-2116 MPa
Flexural Strength2mm/min, 10 NDIN EN ISO 178175 MPa
Elongation at Break50mm/minDIN EN ISO 527-215%
Thermal Properties
Service TemperatureShort termNN300 °C
Service TemperatureLong termNN260 °C
Melting TemperatureDIN EN ISO 11357341 °C
Thermal ConductivityISO 22007-4:20080.27 W/(k*m)
Specific HeatISO 22007-4:20081.10 J/(g*K)
Electrical Properties
Volume ResistivityDIN IEC 600931015 Ohm*cm
Surface ResistivityDIN IEC 60093DIN IEC 60093
Dielectric Strength1015 Ohm
Resistance to Tracking (CTI)DIN EN 60112125 V
Other Properties
Water Absorption0.01%
Density1.31 g/cm³


  • Electronical industry: insulators, connectors and wafer-carrier
  • Mechanical engineering: gear wheels, sliding elements, compressor- and pump-components, drives, bushings, valves and rollers
  • Automotive industry: clutch and gearbox components and turbocharger impeller
  • Conveyor technics: guidances, strokes, rollers, grippers, and valves
  • Medical industry: parts for surgical instruments and short term implants
  • Food industry: valves, blenders, strippers, dosing systems and kneaders
  • Oil and gas industry: drill heads, sealings and sensors


  • Temperature: -60°C up to +250°C (+310°C short term)
  • Extremely strong and wear resistant plastic
  • Oustanding chemical resistance
  • Superior wear resistance and sliding properties
  • Very good dimensional stability
  • Excellent resistance to creep and high energy radiation
  • Excellent resistance to chemicals and hydrolysis
  • Noise dampening
  • Easily machined
  • Inherent flame retardant
  • Good heat deflection temperature
  • Good slide and wear properties

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