Thank You for Your Attention on Beiye!
BYP18 (4J34) has a similar linear expansion coefficient with 95% Al2O3 ceramics from -60℃ to 600℃.
Sealing between vacuum tubes and 95% Al2O3 ceramics
| Ni | 28.5~29.5 | Fe | bal. |
Co | 19.5~20.5 |
| 25℃-400℃ | 6.3~7.1 |
25℃-500℃ | 7.8~8.5 |
Tensile Strength | Soft | Hard | ||
<570 MPa (82.7 ksi) | >700 Mpa (101.5 ksi) | |||
| Hardness | Thickness | Deep-drawing State | ||
>0.2~2.5mm | ≤165HV | |||
>2.5mm | ≤170HV | |||
Gain Size | Deep-drawing State: ≥Level 7 | |||
