Virgin PTFE datasheet Property Method Unit Values (from-to) Specific gravity ASTM D792 - 2,14 - 2,20 Tensile strength ASTM D1457 N/mm2 20 - 35 Elongation at break ASTM D1457 % 210 - 400 Compressive strength 1% deformation ASTM D695 N/mm2 4,00 - 4,50 Deformation under load 14 N/mm2 for 24hrs ASTM D621(1) % 10 - 15 Flexural strength 0,7 N/mm2 ASTM D790 N/mm2 no break Impact strength (Izod) 57°C ASTM D256 J/cm 1,10 Impact strength (Izod) 23°C ASTM D256 J/cm 1,60 Impact strength (Izod) 77°C ASTM D256 J/cm 3,30 Hardness ASTM D2240 (shoreD) 50 - 60 Friction coefficient - static ASTM D3028 (2) - 0,09 Friction coefficient - dynamic ASTM D3028 (2) - 0,05 PTFE -steel oil lubricated - - 0,02 - 0,06 Working temperature range - °C -200 - +260 Increase in volume from room temperature to molten state(340°C) - % 27 - 28 Coefficient of thermal expansion from 25 to 100°C ASTM E831 °C-1 16 x 1-5 Thermal conductivity ASTM D2214 W/mK 0,20 Specific heat 0°C - W/mK 0,96 Specific heat 50°C - W/mK 1,05 Temperature of distortion 0,46 N/mm2 ASTM D648 °C 130 - 140 Temperature of distortion 1,85 N/mm2 ASTM D648 °C 50 - 60 Dielectric strength (short-time air thickness 0,5 mm) ASTM D149 kV/mm 55 Dielectric constant ASTM D150 - 2,10 Dissipation factor ASTM D150 - <0,0002 Volume resistivity ASTM D257 Ohm/cm 10-17 Surface resistivity ASTM D257 Ohm 10-15 Arc-resistance ASTM D495 sec OK (4) Water absorption ASTM D570 % <0,01 Flammability ATB ASTM D635 sec <5,00 Flammability AEB ASTM D635 mm <5,00