Product Features

4J36, also known as Invar 36 alloy, is a special, low expansion iron nickel alloy with an ultra-low coefficient of expansion; Has a low coefficient of linear thermal expansion in the range of 20-100 ° C. 4J42 alloy is an iron nickel alloy with constant expansion, and its coefficient of thermal expansion (CTE) matches hard glass, soft glass, and ceramics. It can achieve airtight packaging shell through glass metal sealing process; Close the CTE of commonly used aluminum oxide, oxide coated LTCC, and AIN circuit substrates; Excellent overall magnetic energy and excellent electrical performance in machining, electroplating, and welding.

Application scope and field

4J36 requires various instruments, instrument components, heated bimetallic passive layers, and resonant cavities with stable dimensions.
4J42 is mainly used for sealing with soft glass, ceramics, etc., to produce leads, frames, and sealing plugs for electronic tubes, transistors, and integrated circuits.