| Place of Origin |
Jiangsu China (Mainland) |
quartz tube with gray color , it can stop visible light for heating lamp , so it very suit for make heating tube for heater . Physical Properties Density 20kg .(*10) 2.2 Coefficient of expansion 25-300 0.58 Softening point () 1670 Annealing point,() 1210 Strain point () 1100 Youngs modulus(Pa) 7.3*10