Typical Properties of HDPE & Polypropylene


Test Method



Mechanical Properties

Density (g/cc) ASTM D792 0.963 0.91
Tensile Strength (p.s.i.) ASTM D638 4,500 4,900
Elongation at Break (%) ASTM D638 250 50-250
Flexural Modulus (p.s.i.) ASTM D790 233,000 210,000
Izod Impact  (ft-lbs/in2) ASTM D256 3.2 1.5
Rockwell Hardness ASTM D785 65 95

Thermal Properties

Heat Distortion at 66 psi (°F) ASTM D648 175 210
Heat Distortion at 264 psi (°F) ASTM D648 118 120
Coefficient of Linear Thermal Expansion (in/in/°C) ASTM D696 0.00007 0.000145

Electrical Properties

Volume Resistivity (Ohm-cm) ASTM D257 >6×1016 >1016

Water Absorption Rates

Water Absorption -24 hrs. (%) ASTM D570 0.01


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.