PEEK - Polyetheretherketone

An advanced engineering plastic with excellent properties

Polyetheretherketone belongs to the group of high performance plastics. PEEK's temperature range goes from -40°C to 250°C with short-lived peaks of up to 300°C. This plastic withstands a heavy load capacity and has excellent chemical resistance.

Add to this the low coefficient of expansion and high material stiffness and it is clear that it offers excellent dimensional stability. PEEK is flame-retardant and food-safe according to the European 10/2011 legislation and the American FDA standard.

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Unique features

  • Very high maximum operating temperature
  • Food-safe
  • Sterilisable
  • Good chemical resistance
  • Good hydrolic resistance
  • Suitable for high-purity environments
  • High dimensional stability

Applications

  • Ball bearing cages, roundels
  • Bearings and seals
  • Electrically insulating parts
  • Medical applications
  • Biological applications
  • Applications in the aircraft industry

Machining options

  • Water jet cutting
  • Laser cutting
  • Welding
  • Gluing
  • Warm bending
  • Cold bending
  • Thermoforming
  • Yes
  • Not in all cases
  • No

How to identify PEEK

Standard PEEK is available in a natural beige colour. PEEK is tough and exceptionally hard. If you wereto knock it with a coin you would hear a clear sound.

PEEK cannot be bent, set or shaped. Due to its wide temperature range, the material will not ignite well.

The technical properties of PEEK

PEEK is the most widely used high performance plastic in mechanical engineering.

The material has a very wide temperature range which runs from -40 to +250 degrees Celsius.

PEEK is very dimensionally stable and therefore widely used for precision parts.

Furthermore, it is characterised by high stiffness and good electrical insulation.

How do you identify PEEK?

Standard PEEK is available in a natural beige colour. PEEK is tough and exceptionally hard. If you wereto knock it with a coin you would hear a clear sound.

PEEK cannot be bent, set or shaped. Due to its wide temperature range, the material will not ignite well.

Watch the instructional video on the most important technical features of PEEK

PEEK is the most widely used high performance plastic in mechanical engineering.

The material has a very wide temperature range which runs from -40 to +250 degrees Celsius.

PEEK is very dimensionally stable and therefore widely used for precision parts.

Furthermore, it is characterised by high stiffness and good electrical insulation.

Technical information

  • General
    Definition Norm Unit Value
    Density ISO 1183 g/cm³ 1.32
    Moisture absorption in normal climate - % 0.2
    Fire rating DIN 4102 - B1
    Specific heat capacity - kj/Kg°C 1.06
  • Mechanical
    Definition Norm Unit Value
    Tensile strength DIN 53455 N/mm 95
    Elongation to break DIN 53455 % 45
    E-Module DIN 53457 (23 °C) N/mm²  4400
    Bending strength DIN 53452 N/mm²  170
    Impact strength DIN 53453 (23 °C) Charpy 7
    Shore or ball pressure hardness - Shore °D 85
    Coefficient of friction - - 0.34
  • Electrical
    Definition Norm Unit Value
    Relative electrical constant DIN 53485 (100Hz) 100 Hz 3.3
    Dielectric loss factor DIN 53483 (100Hz) tan (..x10-³ 0.004
    Specific resistance DIN 53482 16 Ω cm 5
    Surface resistance DIN 53482 13 Ω 10
    Creep current resistance DIN 53480 KC -
    Breakdown voltage DIN 53481 kV/mm 20
  • Thermal
    Definition Norm Unit Value
    Crystalline melting point - °C 340
    Heat conductivity DIN 52162 W/m°K 0.25
    Linear coefficient of expansion DIN 53762 mm/m°C 0.047
    Long-term no-load operating temperature - °C -40 / 250
    Maximum short-term operating temperature - °C 300
    Heat deformation DIN 53461 °C 160
  • Temperature range
    Minimum temperature Maximum temperature
     -40°C  +250°C

Machining data

  • Circular sawing
    Clearance angle (α) 15 - 30 [o]
    Rake angle (λ) 0 - 5 [o]
    Cutting speed 500 - 800 [m/min]
    Tooth pitch 3 - 5 [mm]
  • Band sawing
    Clearance angle (α) 15 - 30 [o]
    Rake angle (λ) 0 - 5 [o]
    Cutting speed 500 - 800 [m/min]
    Tooth pitch 3 - 5 [mm]
  • Drilling
    Clearance angle (α) 3 - 10 [o]
    Rake angle (λ) 10 - 30 [o]
    Top angle (φ) 90 [o]
    Cutting speed 40 - 200 [m/min]
    Start 0.1 - 0.3 [mm/omw]
  • Turning
    Clearance angle (α) 5 - 8 [o]
    Rake angle (λ) 0 - 5 [o]
    Setting angle (χ) 45 - 60 [o]
    Cutting speed 200 - 500 [m/min]
    Start 0.1 - 0.5 [mm]
  • Milling
    Clearance angle (α) 5 - 15 [o]
    Rake angle (λ) 5 - 15 [o]
    Cutting speed 250 - 500 [m/min]
    Start 0.2 - 0.5 [mm/omw]