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High borosilicate 2mm wall thickness stripe glass tube
Technical Data of the High Borosilicate Glass:
1. Chemical composition:
SiO2>78% B2O3>10%
2. Physical and Chemical Properties:
| Coefficient of expansion | (3.3±0.1)×10-6/°C |
| Density | 2.23±0.02 |
| Water resistant | Grade 1 |
| Acid resistance | Grade 1 |
| Alkaline resistance | Grade 2 |
| Softening point | 820±10°C |
| Thermal shock performance | ≥125 |
| Maximum working temperature | 450°C |
| Tempered max. working temperature | 650°C |
3. Main Technical Parameters:
| Melting point | 1680°C |
| Forming temperature | 1260°C |
| Softening temperature | 830°C |
| Annealing temperature | 560°C
|
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