Specification Setting Information Material99.99% sio2 ColorTransparent ShapeCircular / Round Outer Diameter1-780mm Inner Diameter0.5-765mm Wall Thickness0.2-5mm ApplicationIndustrial & Automobile lamps Temperature1200 鈩?/strong> Product Description Product Details 1. SiO2> 99.99% ,tubing fused quartz 2.Operating Temperature: 1250鈩?/p> 3. SoftenTemperature: 1730鈩?/p> 4.Excellent visual and chemical performance . 5. Without surface coating and infectant. 6. Health care and environmental protection. 7. Any dimension can be made. 8. CE.RoHs SGS approved. Density2.2x103 kg/m3Hardness5.5 - 6.5 Mohs' Scale 570 KHN 100 Design Tensile Strength4.8x107 Pa (N/m2) (7000 psi)Design Compressive StrengthGreater than 1.1 x l09 Pa (160,000 psi)SMD 5730 Bulk Modulus3.7x1010 Pa (5.3x106 psi)Rigidity Modulus3.1x1010 Pa (4.5x106 psi) Softening Point1683掳CAnnealing Point1215掳CQuartz For Solar suppliers website:http://www.rjquartz.com/quartz-for-solar/