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- Kovar 4J29 Nickel Alloy
The Kovar nickel alloy supplied by XINHUA has similar linear expansion coefficient with borosilicate (or Pyrex) over a range of temperatures (20℃~450℃), enabling it to be compatible with the thermal expansion characteristics of hard glass so as to achieve hermetic seals.
Oxidation film densification allows this iron-nickel-cobalt alloy to be readily welded and excellent plasticity makes it fabricable. Wide applications are power tubes, vacuum tubes, transmitting tubes, kinescopes, switch tubes, transistors, relay housing, etc.
Coefficient of Linear Expansion
| a/10-6·K-1 | 200-300℃ | 20-400℃ | 20-450℃ |
| / | 4.6-5.2 | 5.1-5.5 |
Stock and Supply of Various Kovar 4J29 Nickel Alloy
Common forms include tube, wire, bar, plate, etc.
| Ni 28.50%- 29.50% | Cr 0.20% Max. | Fe Bal. | Co 16.80%- 17.80% | Cu 0.20% Max. | C 0.03% |
| Mn 0.50% Max. | Si 0.30% Max. | P 0.02% Max. | S 0.02% Max. | Mo 0.20% Max. |
Providing High Nickel Alloys and High Performance Alloys
Jiangsu Xinhua Alloy Co., Ltd.
Mobile: +86-15052359228
Email: Sale07@dianresi.com
Contact Person:Liu Yao
Broad Product Range
Meticulous Production
Unsurpassed Quality