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Bolts in an aircraft are made of _____________

(a) nickel steel

(b) graphite

(c) aluminium

(d) iron

The question was posed to me in class test.

The doubt is from Materials Selection topic in division Materials Selection of Aerospace Materials & Processes

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The correct choice is (a) nickel steel

To explain: Nickel steels are used in making bolts of an aircraft. Bolts are used in structural connections. Bolts made of nickel steel have higher Strength compared to chrome-molybdenum bolts, which are used if there is a requirement of welding as nickel steel is not easy to weld.

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