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What is invar alloy ?

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What is invar alloy ?
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Yogita Ingle 5 years, 10 months ago

Invar is a 36% nickel iron alloy which has the lowest thermal expansion among all metals and alloys in the range from room temperature up to approximately 230°C. The Invar alloy is ductile and easily weldable, and machinability is similar to austenitic stainless steel.

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