BOS Metal Group Co., LTD

ALLOY 4J29
Controlled expansion alloy

Alloy 4J29
Features
  • This is an iron-nickel-cobalt alloy, the coefficient of expansion of 4J29 alloy is close to borosilicate glass within the temperature range of -80~450℃
  • It has a high Curie temperature and maintains stability at low temperatures.
Chemical Analysis
% Fe Ni Cr Co Cu C Mn Si P S Mo
4J29 Min. Balance 28.5 16.8
Max. Balance 29.5 0.2 17.8 0.2 0.03 0.5 0.3 0.002 0.2 0.2
Coefficient of Linear Expansion
20-100°C 20-300°C 20〜400oC 20 〜450°C 20-500°C 20~560°C
- - 4.6 〜5.2 5.1~ 5.5 - -
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    Alloy 4J29
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