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Cyaniding is usually done for _________

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Cyaniding is usually done for _________

(a) Plain carbon steels

(b) Cast irons

(c) Stainless steels

(d) Pig iron

This question was posed to me in an interview for job.

My enquiry is from Nitriding, Cyaniding and Carbonitriding topic in division Heat Treatment of Engineering Material & Metallurgy

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The correct option is (a) Plain carbon steels

To explain I would say: Cyaniding is a process of hardening the surface of steel components through the addition of nitrogen and carbon. It is done by immersing the workpiece is a cyanide bath. Usually, plain carbon steels and alloying steels containing 0.2% carbon are hardened using this process.

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