Product features

4J36, also known as (Invar alloy, Invar36 alloy), is a special low-expansion iron-nickel alloy with an ultra-low cot of thermal expansion; it exhibits a low linear thermal expansion coefficient in the range of 20-100°C. 4J42 alloy is an iron-nickeith constant expansion, whose coefficient of thermal expansion (CTE) matches that of hard glass, soft glass, and ceramics, allowing for hermetic packaging shells via glass-to-metal sealig processes; it is CTE-matched with common alumina, LTCC, and AlN circuit substrates; it possesses excellent magnetic properties, outstanding electrical performance, and good mchinability, plating, and welding properties.

Application scope domain

4J36 is used for various instrument and meter parts requiring dimensional stability, heating bimetal passive layers, and resonant cavities.
4J42 is mai for sealing with soft glass, ceramics, etc., to manufacture leads, frames, and sealing plugs for electron tubes, transistors, and integrated circuits.