30% Glass Fiber (30 GF) PEEK
30 GF PEEK is a grade of PEEK. The graph bars on the material properties cards below compare 30 GF PEEK to: otherwise unclassified thermoplastics (top), all thermoplastics (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Compressive (Crushing) Strength
250 MPa 36 x 103 psi
Elastic (Young's, Tensile) Modulus
10 GPa 1.5 x 106 psi
Elongation at Break
2.1 %
Flexural Modulus
11 GPa 1.5 x 106 psi
Flexural Strength
250 MPa 36 x 103 psi
Impact Strength: Notched Izod
100 J/m 1.9 ft-lb/in
Rockwell R Hardness
120
Shear Strength
100 MPa 15 x 103 psi
Tensile Strength: Ultimate (UTS)
160 MPa 24 x 103 psi
Thermal Properties
Glass Transition Temperature
240 °C 460 °F
Heat Deflection Temperature At 1.82 MPa (264 psi)
300 °C 580 °F
Maximum Temperature: Autoignition
600 °C 1100 °F
Maximum Temperature: Decomposition
570 °C 1060 °F
Maximum Temperature: Mechanical
330 °C 630 °F
Melting Onset (Solidus)
340 °C 640 °F
Specific Heat Capacity
1490 J/kg-K 0.35 BTU/lb-°F
Thermal Conductivity
0.43 W/m-K 0.25 BTU/h-ft-°F
Thermal Expansion
21 µm/m-K
Electrical Properties
Dielectric Constant (Relative Permittivity) At 1 Hz
3.3
Dielectric Strength (Breakdown Potential)
20 kV/mm 0.78 V/mil
Electrical Dissipation At 1 MHz
0.0040
Electrical Resistivity Order of Magnitude
14 10x Ω-m
Otherwise Unclassified Properties
Density
1.5 g/cm3 93 lb/ft3
Limiting Oxygen Index (LOI)
38 %
Water Absorption After 24 Hours
0.11 %
Water Absorption At Saturation
0.3 %
Common Calculations
Stiffness to Weight: Axial
3.7 points
Stiffness to Weight: Bending
48 points
Strength to Weight: Axial
31 points
Strength to Weight: Bending
45 points
Thermal Diffusivity
0.2 mm2/s
Thermal Shock Resistance
57 points
Followup Questions
Further Reading
ASTM F2026: Standard Specification for Polyetheretherketone (PEEK) Polymers for Surgical Implant Applications
Reinforced Plastics Durability, Geoffrey Pritchard (editor), 1999
SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000
Modern Plastics Handbook, Charles A. Harper (editor), 1999
Plastics Materials, 7th ed., J. A. Brydson, 1999
Advanced Materials in Automotive Engineering, Jason Rowe (editor), 2012