9 USA 
3 Belgium 
Kovar Alloy 4j29 Bar Fe Ni Co Constant Expansion - China
price: contact company for price
What is Kovar Alloy 4j29 Bar? 钴基合金棒 (1) Kovar Alloy 4j29 Bar is a controlled-expansion iron-nickel-cobalt alloy renowned for its exceptional thermal expansion compatibility with hard glass and ceramics.
4J29 maintains near-zero dimensional variance across extreme temperature fluctuations, establishing itself as the gold standard for hermetic sealing in critical applications.
This alloy bar also exhibits outstanding resistance to thermal stress cracking and corrosion in vacuum environments.
Kovar Alloy 4j29 Bar is particularly valued for its unique thermal expansion synchrony and impermeable sealing capabilities.
A defining characteristic is its engineered crystallographic structure that remains geometrically stable from cryogenic to elevated temperatures, enabling the fabrication of precision components requiring micron-level tolerance retention during thermal cycling.
Company Contact:
- Posted By: DLX ALLOY
- Phone: 13218680935
- Address: 新北区太湖西路 , 常州 , 江苏 , China
- Email:
- Website: https://www.dlxalloys.com/
Published date: December 30, 2025
- Business Description: Established in 2002, Over 22 years of industry experience in providing OEM/ODM services Location: Zhenjiang Industrial Park, Jiangsu Province, covers an area of about 12,000 square meters.
Annual output: The total output of alloy material is about 1200 tons, the main products include electric heating alloy material, high temperature alloy, special nickel-based welding wire, furnace bar, etc.
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