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Nickel and Its Alloys
Ferro-nickel
Chemical Industry
Vacuum Applications
Forming Components
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Concept Métal, your supplier of ferronickel (Invar / Kovar)
The ferro-nickel refers to a family of iron-nickel alloys known for their controlled thermal expansion. Whereas most metals deform when heated, these alloys maintain stable dimensions—a property that is essential in electronics, cryogenics, and precision tooling.
What is a ferro-nickel alloy?
The ferro-nickel is a metal alloy composed primarily of iron and nickel, whose nickel content directly determines its coefficient of thermal expansion. By adjusting this ratio, materials with a very low coefficient of thermal expansion or one calibrated to match that of other materials can be produced.
The main grades of ferro-nickel are:
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The Properties of Ferro-Nickel
A very low coefficient of expansion
This is the key property of ferro-nickel. Invar 36 exhibits virtually zero thermal expansion around room temperature, ensuring unmatched dimensional stability for high-precision parts.
An adjustable expander for cementation
By adjusting the nickel content, Invar and Kovar alloys provide a controlled rate of expansion that matches that of glass or ceramics. This compatibility enables leak-tight and durable glass-to-metal seals, which are essential in electronics.
Long-lasting dimensional stability
The ferro-nickel retains its shape over time and under thermal cycling, without any significant deformation. This stability makes it a reliable material for custom-made parts that require consistent tolerances.
What are the industrial applications of ferronickel?
Because of its controlled expansion, the ferro-nickel is used in many industries for the manufacture of:
- Tools and molds for composite materials in the aerospace industry
- glass-to-metal seals and watertight feed-throughs in electronics
- cryogenic equipment and liquefied gas tanks
- measuring and metrology instruments
- components for vacuum and forming applications
Applications
- Chemical Industry
- Vacuum Applications
- Forming Components
Available Sizes
- Round bars
- Flat-bottomed
- Strips
- Plates
- Custom-made: blanks, blocks, discs, parts made to specifications
Gallery
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