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1.Normal Size
For heavy wall
25*4.0, 25*4.0, 25*4.0, 28*4.0,
32*3.2, 32*3.2, 32*4.0, 32*4.0,
35*3.2, 35*4.0, 38*3.2, 44*4.0,
44*4.0, 51*4.0, 51*4.0, 51*7.0,
For light wall,
7*1.5, 14*2.0, 19*3.0, 19*2.0,
20*2.0, 23*2.0, 30*2.0, 5.0*1.0,
9.0*1.5, 9*2.0, 7.0*1.5, 10*1.5,
13*1.8, 18*1.8, 22*2.0, 9*2.0,
2.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%
3.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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