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Tuffak Polycarbonate Technical Data Technical Specification PROPERTIES TEST METHOD UNIT TYPICAL VALUES TUFFAK A TUFFAK XL Physical Density DIN 53479 g/cm³ 1.20 1.20 Water Absorption ASTM D 570 % 0.10 0.15 Poisson's ratio ASTM D 638 - 0.38 0.38 Optical   Light transmission (3mm) ASTM D 1003 % 89 88 Mechanical   Tensile strength at yield DIN 53455 Mpa 60 60 Tensile strength at break DIN 53455 Mpa 70 70 Elongation at break DIN 53455 % 100 80 Tensile modulus DIN 53457 Mpa 2300 2300 Flexural modulus DIN 53457 Mpa 2500 2500 Charpy impact strength (notched, 23°C) DIN 53453 KJ/m² 35 30 Izod impact strength (notched, 23°C) ASTM D 256 J/m 850 700 Rockwell hardness (M scale) ASTM D 785 - 70 70 Thermal   Vicat softening temp, 50 N DIN 53460 °C 153 148 HDT, 1.82 MPa DIN 53461 °C 138 134 Coeff. of linear thermal expansion VDE 0304/1 m/m°C 7 x 10-5 7 x 10-5 Thermal conductivity ASTM C 177 W/m°C 0.20 0.20 Max. continuous service temperature - °C 100 100   Light Transmission Through its excellent UV protection Tuftak XL will maintain these values over an extended period of time even when exposed to direct sunlight. Accelerated Xenon tests run on Tuftak XL for 5000 hours (corresponding to more than 10 years of outdoor exposure) show a very small changing of light transmission and yellowness index, (Tuffak XL weathering characteristic graphs) Fire Performance and Classification PROPERTY NORM FIRE CLASSIFICATION TUFFAK A TUFFAK XL Rating UL 94 V-2 -V-0 HB V-2

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