Material Properties Polyester (Rigid) admin May 20, 2016January 17, 2017 Material Properties for Polyester (Rigid) Physical specifications of materials. Materials Polyester (Rigid) Description Density g/cc 1.65 lb/in^3 0.05965 Hardness Brinell unless specified 90(Rockwell-M) Tensile Strength ultimate Mpa 58 Ksi 8.41 Yield Strength MPa 70 Ksi 10.15 Modulus of Elasticity Gpa 3.5 10^6 Psi 0.507246376 Poisson’s Ratio %Elongation at break 2.4 %Reduction of area Izod Impact J 0.22 Ft-lb 0.162316 Fracture Toughness Mpa(m)^0.5 0.6 Ksi(in)^0.5 0.54 Thermal conductivity W/m-K 0.17 Btu/ft-h-F 0.09826589594 Specific Heat Cpacity J/g-K Btu/lb-F Coefficient of thermal expansion 1E-6/K 135 1E-6/F 75.112781895 Electrical Resistivity Ohm-cm 100000000000000