Glass cylinder
borosilicate COE 33 glass tube, also called as PYREX glass tube.
Similar with Schott's DURAN or Kavalier's SIMAX
OD from 3mm till 350MM, wall thickness from 0.5MM till 10MM
Physical Property |
| No. |
Physical performance |
Numerical Value |
Unit |
| 1 |
Coefficient of mean linear thermal expansion(20°C,300°C) |
3.3±0.1 |
10-6K-1 |
| 2 |
Transformation temperature |
525±15 |
°C |
| 3 |
Softening point |
820±10 |
°C |
| 4 |
Working point |
1260±20 |
°C |
| 5 |
Density at 20°C |
2.23±0.02 |
g/cm3 |
| 6 |
Mean thermal conductivity(20°C-100°C) |
1.2 |
w/m2k |
| 7 |
Refractive index |
0.92 |
1 |
| Main Composition |
| SiO2 |
B2O3 |
Na2O+K2O |
Al2O3 |
| 81 |
13 |
4 |
2 |
| Chemical Property |
| Hydrolytic resistance at 98°C |
ISO719-HGB 1 |
| Hydrolytic resistance at 121°C |
ISO720-HGA 1 |
| Acid resistance Class |
ISO1776-First Class |
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