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Peek Properites

(compression molded and injection molded versions also available)

ASTM or UL test Property Unfilled 30% Glass Fibers 30% Carbon Fibers Bearing Grade
PHYSICAL
D792 Density (lb/in³)
(g/cm³)
0.047
1.31
0.056
1.54
0.051
1.41
0.052
1.44
D570 Water Absorption, 24 hrs (%) 0.10 0.10 0.06 0.05
MECHANICAL
D638 Tensile Strength (psi) 16,000 15,000 19,000 11,000
D638 Tensile Modulus (psi) 500,000 900,000 1,100,000 850,000
D638 Tensile Elongation at Break (%) 20 3 5 2
D790 Flexural Strength (psi) 25,000 28,000 25,750 27,500
D790 Flexural Modulus (psi) 600,000 1,000,000 1,250,000 1,100,000
D695 Compressive Strength (psi) 20,000 26,000 29,000 26,700
D695 Compressive Modulus (psi) 500,000 1,000,000 1,000,000
D785 Hardness, Rockwell M100 (R126) M103 M102 M85
D256 IZOD Impact Notched (ft-lb/in) 1.0 1.4 1.0 0.7
THERMAL
D696 Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)
2.6 1.2 1.0 1.7
D648 Heat Deflection Temp (°F / °C)
at 264 psi
320 / 160 600 / 315 550 / 288 383 / 195
D3418 Melting Temp (°F / °C) 644 / 340 644 / 340 644 / 340
Max Operating Temp (°F / °C) 480 / 249 480 / 249 500 / 260 482 / 250
C177 Thermal Conductivity
(BTU-in/ft²-hr-°F)
(x 10-4 cal/cm-sec-°C)
1.75
6.03
2.98
10.3
6.4
22.0
1.7
5.9
UL94 Flammability Rating V-0 V-0 V-0 V-0
ELECTRICAL
D149 Dielectric Strength (V/mil) short time, 1/8″ thick 480 500 32
D150 Dielectric Constant at 1 MHz 3.30 3.70
D150 Dissipation Factor at 1 MHz 0.003
D257 Volume Resistivity (ohm-cm) at 50% RH 4.9 x 1016 5 x 1016 105 103

NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets.