30% Glass Fiber (30 GF) PEI
30 GF PEI is a grade of PEI. The graph bars on the material properties cards below compare 30 GF PEI to: imide plastics (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
180 MPa 25 x 103 psi
Elastic (Young's, Tensile) Modulus
5.6 GPa 0.81 x 106 psi
Elongation at Break
3.0 %
Flexural Modulus
5.9 GPa 0.86 x 106 psi
Flexural Strength
210 MPa 30 x 103 psi
Impact Strength: Notched Izod
110 J/m 2.1 ft-lb/in
Rockwell M Hardness
130
Tensile Strength: Ultimate (UTS)
160 MPa 24 x 103 psi
Thermal Properties
Glass Transition Temperature
210 °C 420 °F
Heat Deflection Temperature At 1.82 MPa (264 psi)
210 °C 410 °F
Maximum Temperature: Autoignition
530 °C 990 °F
Maximum Temperature: Decomposition
530 °C 980 °F
Maximum Temperature: Mechanical
170 °C 340 °F
Specific Heat Capacity
1050 J/kg-K 0.25 BTU/lb-°F
Thermal Conductivity
0.23 W/m-K 0.13 BTU/h-ft-°F
Thermal Expansion
20 µm/m-K
Electrical Properties
Dielectric Constant (Relative Permittivity) At 1 MHz
3.7
Dielectric Strength (Breakdown Potential)
30 kV/mm 1.2 V/mil
Electrical Resistivity Order of Magnitude
14 10x Ω-m
Otherwise Unclassified Properties
Density
1.5 g/cm3 94 lb/ft3
Limiting Oxygen Index (LOI)
50 %
Water Absorption After 24 Hours
0.17 %
Water Absorption At Saturation
0.9 %
Common Calculations
Stiffness to Weight: Axial
2.1 points
Stiffness to Weight: Bending
39 points
Strength to Weight: Axial
30 points
Strength to Weight: Bending
44 points
Thermal Diffusivity
0.14 mm2/s
Thermal Shock Resistance
100 points
Followup Questions
Further Reading
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