Expansion Alloys

INVAR (36)

Invar, discovered in 1896, is the oldest of all nickel and cobalt based alloys. Main property is the extremely low thermal expansion at room temperatures realizing dimensional stability for all kinds of applications.

Typical functions in technologies

construction (LNG carriers), bimetals, spacers, frames, malls (composite manufacturing), chambers or positioning frames.

Typical industries that apply Invar material in their technology

laser technology, semiconductor, aerospace, medical, cryogenics, military, optical, electronics and automotive.

INVAR 42

Created in 1899 as a variation on INVAR 36, whereas INVAR 42 has the lowest CTE between 20-300 degrees C.

Typical functions in technologies

metal to glass sealing, metal to ceramic sealing, spacers, frames, malls (composite manufacturing).

Typical industries that apply Invar 42 material in their technology

aerospace, medical, military, optical, electronics, tooling and lighting.

KOVAR

Created in 1930. This alloy has two typical applications. Between 20-500 ºC, KOVAR has the lowest CTE of all alloys. But its CTE is also equal to glass and ceramics. Making it an ideal metal to seal glass metal or ceramic-metal. Many glass sealing systems are built up with KOVAR.

Typical functions in technologies

positioning, tooling, metal to glass sealing or metal to ceramic sealing<

Typical industries that apply KOVAR material in their technology

medical, military, lighting, optical, electronics and cryogenics.

FENI 48 and FENI 52

The alloys with the highest percentage of nickel have the highest controlled CTE of all nickel alloys.

Typical functions in technologies: metal to (soft) glass sealing

Typical industries that apply FENI 48 / 52 material in their technology: medical, lighting, optical and electronics.