Colored borosilicate glass tube 14 kinds colors tubing and 22 kinds colors glass rod in China
1.Clear or colored borosilicate glass tube and rod.
2.can produce sizes as clients request.
3.maily use for making laboratory glassware,smoke pipe,glass Jar,lighting glass,building glass,and so on
Product Description
Borosilicate Clear Glass
Physical data sheet
| NO |
Physics performance |
Numerical Value |
Unit |
| 1 |
coefficient of mean linear thermal expansion(20ºC;300 ºC) |
3.3±0.1 |
10-6 K-1 |
| 2 |
Transformation Temperature |
525±15 |
ºC |
| 3 |
Softening point |
820±10 |
ºC |
| 4 |
Working point |
1260±20 |
ºC |
| 5 |
Density at 20ºC |
2.23±0.2 |
g/cm2 |
| 6 |
Mean thermal conductivity(20ºC-100ºC) |
1.2 |
W/m.K |
| 7 |
Refractive Index |
0.92 |
l |
Chemical Composition in approximate weight %( main components)
| Item . |
SiO2 |
B2O3 |
AL2O3 |
Na2O +K2O |
| % |
81 |
13 |
2 |
3.08 |
Chemical Data:
Hydrolytic resistance at 98ºC ISO719-HGB 1
Hydrolytic resistance at 121ºC ISO720-HGB 1
water resistance Grade 1 Test method: ISO1776
Acid resistant Class Grade 1 Test method: ISO1776
Packaging & Shipping
Our Services
1.Can produce as client request.
2.Can cut round ends,and do fire-polished also.
3.Can produce better quality with small tolerance,by platinum tip.
