FeNiCo Ceramic Sealing Alloy
33НК
The fixed expansion porcelain is sealed with iron nickel cobalt alloy, which has a hot wire expansion coefficient similar to that of 95% Al2O3 ceramics in the range of – 60-500 ℃.
Equivalent Grades
GB | ГОСТ | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
4J33 | 33НК | – | – | – | – | – | – | KV-4 | – |
4J34 | – | Ceramvar | | Vacon 20 | | | | | |
Chemical Composition, %
Alloy | C | Mn | Si | P | S | Ni | Co | Fe |
4J33 | ≤0.05 | ≤0.5 | ≤0.3 | ≤0.02 | ≤0.02 | 32.1-33.6 | 14.0-15.2 | Rest |
4J34 | ≤0.05 | ≤0.5 | ≤0.3 | ≤0.02 | ≤0.02 | 28.5-29.5 | 19.5-20.5 | Rest |
Average Linear Expansion Coefficient
Alloy | Heat treatment for sample | Average linear expansion coefficient a/10-6.K-1 |
20~400℃ | 20~500℃ | 20~600℃ |
4J33 | Heating to temperature between 900℃±20℃ in a protective or vacuum atmosphere. Holding for 1hour, cooling to 200℃ at a rate less than 5℃ per min, then air cooling | 6.0~6.8 | 6.6~7.4 | |
4J34 | 6.3~7.1 | | 7.8~8.5 |
Available Products and Specifications
Rod, Bar, Wire and Forgings | YB/T5234-93, ГОСТ 10994-1974, ГОСТ 14080-78 |
Plate, Sheet and Strip | YB/T5234-93, ГОСТ 10994-1974, ГОСТ 14080-78 |
Pipe and Tube | YB/T5234-93, ГОСТ 10994-1974, ГОСТ 14080-78 |
Welding Product | – |
Others | YB/T5234-93, ГОСТ 10994-1974, ГОСТ 14080-78 |
Features
FeNiCo Ceramic Sealing Alloys are usually applied for match sealing electronic apparatus in ceramic 95% Al2O3.
Applications
FeNiCo Ceramic Sealing Alloys are usually applied for match sealing electronic apparatus in ceramic 95% Al2O3.