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Polycarbonate  Technical Data Property ASTM Method Units Results Specific Gravity D-792   1.2 Optical Refractive Index D-542   1.586 Light Transmittance D-1003 % 85-91 Haze D-1003 % 0.5-2.0 Mechanical Tensile Strength D-638          Ultimate D-638 psi 9,500 Yield D-638 psi 8,400         Elongation D-638 % 100 Tensile Modulus D-638 psi 340,000 Flexural Strength D-790 psi 13,500 Flexural Modulus D-790 psi 340,000 Compressive Strength (0.05*/minute) D-695 psi 12,500 Impact Strength Izod (1/8" notched) D-256 ft-lbs/ 16 Rockwel Hardness D-785   R118 Shear Strength D-732 psi 5,800 Thermal Temperature Range       Dry Air   250°F-270°F   Water   140°F   RH Air   100%   Heat Deflection Temperature                         Under Load, 264 psi D-648 °F 275                                        66 psi D-648 °F 285 Coefficient of Thermal Expansion D-696 in/in/°F 3.8 x 10-5 Coefficient of Thermal Conductivity C-177 BTU/hr/sq. ft/ 1.35   °F/in   Specific Heat   BTU/lb/°F 0.3 Water Absorption (24 hrs at 73°F)* D-570 % 0.15 Electrical Dielectric Constant D-149 volts/mil 380 @ 25°C                    Test at .125" Thick     450 @ 100°C Dielectric Constant D-150     60Hz     2.9             1,000,000 Hz     2.9 Volume Resistivity at 23°C D-257 ohm/cm 1016 *Test performed on .125" thick specimens; all other test specimens were .250" thick

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