Color Shaped Borosilicate Glass Tubes

Description

Color Shaped Borosilicate Glass Tubes,

Color available: amber, blue, light blue, green, pink, purple, teal, red, yellow, transparent black
We can also make special size for you according to drawing.

Main Composition
a) SiO2: 80±0.5%
b) B2O3:13±0.2%
c) Al2O3:2.4±0.2%
d) Na2O (+K2O):4.3±0.2%

Physical and Chemical Properties
a) Coefficient of mean linear thermal expansion (20/300℃):3.3±0.1 (10-6K-1)
b) Transformation temperature: 525±15℃
c) Melting point: 1,260±20℃
d) Softening point: 820±10℃
e) Density at 20℃:2.23g/cm2
f) Hydrolytic resistance at 98℃: ISO719-HGB1
g) Hydrolytic resistance at 121℃: ISO720-HGA1
h) Acid resistance class: ISO1776-1
i) Alkali resistance class: ISO695-A2

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