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Alloys

Which of the ...

Question

Which of the following is a ferrous alloy?

A

Solder

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B

Invar

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C

Type metal

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D

Magnalium

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Solution

The correct option is D Invar
1) Invar is a ferrous alloy.

2) Invar is $F e N i 36$ ( $64 F e N i$ in the US).

3) It is nickel–iron alloy notable for its uniquely low coefficient of thermal expansion (CTE or $α$ ).

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