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. PHYNICX has developed a low carbon enhanced grade of INVAR with even lower CTE than in general. PHYNICX INVAR is melted generally under vacuum.

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. PHYNICX INVAR 42 is melted under vacuum in general. Applicable norm is ASTM F30 or DIN

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.

phynicx SUPERINVAR

Discovered many years later than INVAR, SUPERINVAR has an - up to 80 % - lower CTE than INVAR 36. PHYNICX has developed an optimal analysis of this alloy and the required treatments to avoid creep and phase transformation, relatively often occuring after hot or cold forming.

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. PHYNICX KOVAR is melted under vacuum. Applicable norm is ASTM F15.

Up to larger sizes than usual, the PHYNICX KOVAR has no phase transformation at -196 degrees C.

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.

Melted under vacuum. Applicable norm is ASTM F30