20% Glass Fiber (20 GF) HDPE
20 GF HDPE is a grade of HDPE. The graph bars on the material properties cards below compare 20 GF HDPE to: polyethylene 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
Elongation at Break
2.5 %
Flexural Modulus
4.0 GPa 0.58 x 106 psi
Impact Strength: Notched Izod
50 J/m 0.94 ft-lb/in
Tensile Strength: Ultimate (UTS)
55 MPa 8.0 x 103 psi
Thermal Properties
Maximum Temperature: Mechanical
90 °C 190 °F
Specific Heat Capacity
1710 J/kg-K 0.41 BTU/lb-°F
Otherwise Unclassified Properties
Density
1.1 g/cm3 68 lb/ft3
Water Absorption At Saturation
0.1 %
Common Calculations
Strength to Weight: Axial
14 points
Strength to Weight: Bending
29 points
Followup Questions
Further Reading
ASTM D883: Standard Terminology Relating to Plastics
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