Controlled Expansion Alloys – Alloy 42, 46, 48, 52, Kovar®, ASTM F15, Invar®, Super Invar 32-5

Ed Fagan Inc. is a leading supplier of controlled expansion alloys since 1965. The alloys classified in this category are Alloy 42, Alloy 46, Alloy 48 and Alloy 52, as well as Kovar®, Invar® and Super Invar.  These alloys are found in a broad variety of applications where thermal changes of a metal must be factored into the design of a component.  Typically useful when forming a hermetic seal with glass or ceramic or when a specific expansion must be met over a certain temperature range. Contact the Ed Fagan Inc. sales team to discuss your material needs and how our product line of controlled expansion alloys can fit your requirements.

Alloy 42

Alloy 42 is a controlled expansion alloy consisting of 41% nickel, balance iron.  Useful in a wide variety of electronic applications, lead frames, especially for glass and ceramic seals.  Alloy 42 is also called Pernifer® 42, NILO® 42 and CarTech® Glass-Sealing 42-6 Alloy.

Alloy 46

A controlled expansion alloy that consists of 46% nickel, balance iron.  This alloy is used in a variety of electronic applications, especially for glass and ceramic seals.  Alloy 46 is referred under the trade names of Pernifer® 46, NILO® 46 and CarTech® Glass Sealing 46 Alloy.

Alloy 48

Alloy 48 is a controlled expansion alloy, consisting of 48% nickel, balance iron; used in a variety of electronic applications, especially for glass and ceramic seals.  Alloy 48 is also known as Pernifer® 48, NILO® 48.

Alloy 52

Alloy 52 is a controlled expansion alloy, consisting of 51% nickel, balance iron; used in a wide variety of electronic applications, especially for glass seals.  Alloy 52 is also referenced as Pernifer® 50  and CarTech® Glass Sealing 52 Alloy.

ASTM F15 | Kovar®

ASTM F15 Alloy, commonly known as Kovar®, is a low expansion alloy comprised of 29% nickel, 17% cobalt and balance iron.  Produced to ensure good properties for machining and deep drawing, as well as being a porosity free product. Its expansion characteristics match both borosilicate (Pyrex®) glasses and alumina ceramics. It is one of the most popular of the controlled expansion alloys for hermetic sealing. ASTM F15 is also known as Kovar®, NILO® K, Pernifer® 2918, Rodar® and Dilver® P1.

Invar®

Invar® is a nickel-iron alloy most noted for its low coefficient of thermal expansion.  Comprised of 36% nickel with the balance Iron it is an austenitic alloy. It provides a useful degree of corrosion resistance while being a strong, tough and ductile.  The name Invar is a variant of Invariant, a reference to its low expansion characteristics.  Invar is also referenced as CarTech® Invar 36, NILO® 36, Invar Steel and Pernifer® 36.

Super Invar 32-5

Super Invar 32-5 is a low expansion alloy consisting of 32% nickel, 5% cobalt, balance iron. It exhibits minimum thermal expansion (one half of Invar 36) at room temperature.

 

Ed Fagan Inc. supplies the highest quality controlled expansion special purpose alloys for the aerospace, aviation, communications, defense, electronics, energy, medical, nuclear, research, and other high-technology industries.

 

 

 

 

CarTech® Glass-Sealing 42-6 Alloy, CarTech® Glass Sealing 46 Alloy, CarTech® Glass Sealing 52 Alloy, Invar 36®, Kovar® are registered trademarks of CRS Holdings LTD, Delaware.

Invar® is a registered trademark of Aperam Alloys Imphy, France.

NILO® 36, NILO®42, NILO® 48, NILO® K are registered trademarks of Huntington Alloys Corp, West Virginia.

Pernifer®36, Pernifer® 48, Pernifer® 50, Pernifer® 2918 are registered trademarks of VDM Metals GmbH, Germany