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BYP18 (4J34) has a similar linear expansion coefficient with 95% Al2O3 ceramics from -60℃ to 600℃, This match is critical for creating reliable ceramic-to-metal seals, making it a prime example of high-performance controlled expansion alloys and showcasing the engineering precision of specialized expansion alloys.
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 | |||
Don't hesitate to contact Beiye for a pricing inquiry on BYP18 (4J34) and our comprehensive precision alloy and supply solutions.
