Glass Tube

Si 80% above
Strain temperature 520℃
Annealing temperature 560℃
Softening temperature 820℃
Refractive index 1.47
Light transmittance (2 mm) 92%
Elastic modulus 76KNmm-2
Tensile strength 40-120Nmm-2
Optical glass stress constant
3.8*10-6 Square millimeter/no
The processing temperature (104 dpas) 1220℃
The linear expansion coefficient (20-300 ℃) 3.3*10-6K-1
Density (20 ℃) 2.23gcm -1
Specific heat 0.9jg-1K/-1
Thermal conductivity 1.2Wm-1K/-1
Water resistance (the international organization for standardization 719)
Class 1
Acid-proof performance (the international organization for standardization 195)
Class 1
Alkali resistant properties (the international organization for standardization 695)
Class 2