Polyetheretherketone (PEEK)

Notes

Example stock parts: machine screw, washer, tubing, and connector.

Properties

Compare
Compressive (Crushing) Strength
120 to 300 MPa, or 17 to 43 103 psi
Density
1.32 to 1.52 g/cm3, or 82.4 to 94.8 lb/ft3
Elastic (Young's) Modulus
4 to 24 GPa, or 0.58 to 3.4 106 psi
Elongation at Break
Typical
1.5 to 40 %
Flexural Modulus
3.9 to 24 GPa, or 0.56 to 3.4 106 psi
Flexural Strength (MOR)
Typical
160 to 345 MPa, or 23 to 50.0 103 psi
Glass Transition Temperature
145 °C, or 293 °F
Hardness
Shore (Durometer) D
85 to 90
Heat Deflection Temperature
At 1.82 MPa (264 psi)
160 to 315 °C, or 320 to 599 °F
Maximum Temperature
Typical Guideline
250 °C, or 480 °F
Maximum Temperature
Onset of Melting (Solidus)
340 °C, or 640 °F
Maximum Temperature
Decomposition
Shear Strength
50 to 100 MPa, or 7.2 to 14 103 psi
Specific Heat Capacity
Conventional
1700 to 1800 J/kg-K
Specific Heat Capacity
Volumetric
2200 to 2500 103 J/m3-K
Speed of Sound
55 to 120 103 m/s, or 180 to 390 103 ft/s
Stiffness-to-Weight Ratio
Flexural
2.9 to 16 MN-m/kg
Stiffness-to-Weight Ratio
Tensile
3 to 16 MN-m/kg
Strength-to-Weight Ratio
Compressive
90 to 200 kN-m/kg
Strength-to-Weight Ratio
Flexural
120 to 240 kN-m/kg
Strength-to-Weight Ratio
Shear
37 to 69 kN-m/kg
Strength-to-Weight Ratio
Tensile, Ultimate
75 to 160 kN-m/kg
Tensile Strength
Ultimate
100 to 230 MPa, or 14 to 33 103 psi
Tensile Strength
Ultimate, 100°C (210°F)
Tensile Strength
Ultimate, 200°C (390°F)
Tensile Strength
Ultimate, 300°C (570°F)
Thermal Conductivity
Ambient
0.25 to 0.93 W/m-K
Thermal Expansion
20 to 100°C
15 to 48 µm/m-K
Water Absorption
After 24 Hours
0.06 to 0.1 %
Water Absorption
At Saturation
0.22 to 0.5 %

Only showing properties for which the substantial majority of variants have data.

See Also

Charles A. Harper (editor), Modern Plastics Handbook, 1999.


J. A. Brydson, Plastics Materials, 7th ed., 1999 (link).


Michael L. Berins (editor), SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., 2000.

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