4J29 （F15）
Similar Grades
GB/T | AISI/ASTM | JIS | W.Nr |
4J29 | F15 | EMAS-1001 | 1.3912 |
Chemical Composition of 4J29:
Alloy | % | Ni | Cr | Fe | Co | Cu | C | Mn | Si | P | S | Mo |
4J29 | min | 28.5 | Balance | 16.8 | ||||||||
max | 29.5 | 0.2 | 17.8 | 0.20 | 0.03 | 0.50 | 0.30 | 0.02 | 0.02 | 0.20 |
Average Linear Expansion Coefficient（10-6℃）:
20~100℃ | 20~300℃ | 20~400℃ | 20~450℃ | 20~500℃ | 20~530℃ | 20~600℃ |
—— | —— | 4.6~5.2 | 5.1~5.5 | —— | —— | —— |
The 4J29 alloy has a coefficient of expansion similar to that of hard glass over a wide temperature range (-80~450℃). In the electro-vacuum industry, it is used for sealing with hard glass to manufacture high-airtightness components, and can also be sealed with ceramics. Name: Fe-Ni-Co glass-sealing alloy. It exhibits a thermal expansion coefficient close to that of borosilicate hard glass in the temperature range of 20～450℃, featuring a high Curie point and excellent low-temperature microstructural stability. It is a Fe-Ni-Co glass-sealing alloy.