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Peek Properites

(compression molded and injection molded versions also available)

ASTM or UL testPropertyUnfilled30% Glass Fibers30% Carbon FibersBearing Grade
PHYSICAL
D792Density (lb/in³)
(g/cm³)
0.047
1.31
0.056
1.54
0.051
1.41
0.052
1.44
D570Water Absorption, 24 hrs (%)0.100.100.060.05
MECHANICAL
D638Tensile Strength (psi)16,00015,00019,00011,000
D638Tensile Modulus (psi)500,000900,0001,100,000850,000
D638Tensile Elongation at Break (%)20352
D790Flexural Strength (psi)25,00028,00025,75027,500
D790Flexural Modulus (psi)600,0001,000,0001,250,0001,100,000
D695Compressive Strength (psi)20,00026,00029,00026,700
D695Compressive Modulus (psi)500,0001,000,0001,000,000
D785Hardness, RockwellM100 (R126)M103M102M85
D256IZOD Impact Notched (ft-lb/in)1.01.41.00.7
THERMAL
D696Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)
2.61.21.01.7
D648Heat Deflection Temp (°F / °C)
at 264 psi
320 / 160600 / 315550 / 288383 / 195
D3418Melting Temp (°F / °C)644 / 340644 / 340644 / 340
Max Operating Temp (°F / °C)480 / 249480 / 249500 / 260482 / 250
C177Thermal 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
UL94Flammability RatingV-0V-0V-0V-0
ELECTRICAL
D149Dielectric Strength (V/mil) short time, 1/8″ thick48050032
D150Dielectric Constant at 1 MHz3.303.70
D150Dissipation Factor at 1 MHz0.003
D257Volume Resistivity (ohm-cm) at 50% RH4.9 x 10165 x 1016105103

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.