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Controlled Expansion Alloys
Invar (aka Invar 36, NILO 36, Invar Steel & Pernifer 36), Super Invar, Kovar (aka ASTM F-15, NILO K, Pernifer 2918, Rodar, and Dilvar P1), 42 Alloy (aka Pernifer 42, NILO 42, & Glass-Seal 42), 46 Alloy (aka Pernifer 46, NILO 46, & Glass-Seal 46), 48 Alloy (aka Pernifer 48, NILO 48, & Glass-Seal 48), 52 Alloy (aka Pernifer 50, NILO 50, Glass-Seal 52
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Electrical/Electronic Nickel
Nickel Grades 200, 201, 205, 233, & 270
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Soft Magnetic Alloys
Alloy 50 (aka Magnifer 50, Carpenter High Permeability 49, & Alloy 4750), Alloy 79 (aka Magnifer 7904, Carpenter HyMu 80, Hipernom, Moly-Permalloy, & Permalloy 80) VIM VAR Core Iron, Hiperco 50, & Radiometal 4550
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Refractory Metals and Alloys
Molybdenum, TZM Molybdenum, Tungsten, Tungsten Alloy, Tantalum, Niobium (aka Columbium), & Rhenium
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Hard to Find
Use our Material Locator service for hard to find materials for the Aerospace/Aviation, Defense, Electronics, Magnetic, Medical, Lighting, Optical, Telecommunications, Ceramics, Heat Treating, and other high-technology industries.
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Controlled Expansion Alloys

For applications where metals must form a hermetic seal with glass or ceramic (e.g. vacuum tubes, lamps, power tubes, etc.); or applications where a specific expansion must be met over a certain temperature range (e.g. optoelectronics, optical and laser benches, etc.).

Ed Fagan Inc stocks:

 

Invar

Invar3 is a low expansion alloy, consisting of 36% Nickel, balance Iron. This alloy exhibits extremely low expansion around ambient temperatures and is often used where minimum expansion is required. Invar was originally used for surveying tapes. The name Invar is a variant of Invariant, a reference to it’s low expansion charachteristics. Invar is also known as Invar 361, NILO 364, Invar Steel and Pernifer 362.

Super Invar

Super Invar 32-5 is a low expansion alloy consisting of 32% Nickel, 5% Cobalt, balance Iron that exhibits minimum thermal expansion (one half of Invar 36) at room temperature.

Kovar

ASTM F-15 Alloy, commonly known as Kovar1, is a controlled expansion alloy consisting of 29% Nickel, 17% Cobalt, and balance Iron. Kovar is produced to ensure good properties for machining and deep drawing as well as 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. Kovar is also known as ASTM F-15, NILO K4, Pernifer 29182, Rodar1, and Dilvar P13.

Alloy 42

Alloy 42 is a controlled expansion alloy, consisting of 42% Nickel, balance Iron; used in a wide variety of electronic application, lead frames, especially for glass and ceramic seals. Alloy 42 is also known as Pernifer 422, NILO 424, and Glass-Seal 421.

Alloy 46

A controlled expansion alloy, consisting of 46% Nickel, balance Iron; used in a variety of  electronic applications, especially for glass and ceramic seals. Alloy 46 is also known as Pernifer 462, NILO 464, and Glass-Seal 461.

Alloy 48

Alloy 48 is a controlled expansion alloy, consisting of 48% Nickel, balance Iron; used in a variety of electronic application, especially for glass and ceramic seals. Alloy 48 is also known as Pernifer 482, NILO 484, and Glass-Seal 481.

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 known as Pernifer 502, NILO 504, and Glass-Seal 521.

ED FAGAN INC. supplies the highest quality special purpose metals and alloys for Aerospace/Aviation, Defense, Electronics, Magnetic, Medical, Lighting, Optical, Telecommunications, Ceramics, Heat Treating, and other high-technology industries.

1. Trademark Carpenter Technology Corp., Reading PA
2. Trademark ThyseenKrupp-VDM, Germany
3. Trademark Imphy Alloys, France
4. Trademark Special Metals Corporation, USA