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Nitriding steels are tempered at about ________

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Nitriding steels are tempered at about ________

(a) 100-200^oC

(b) 300-450^oC

(c) 600-700^oC

(d) 800-950^oC

This question was addressed to me during an online interview.

This question is from Nitriding, Cyaniding and Carbonitriding topic in portion Heat Treatment of Engineering Material & Metallurgy

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Correct answer is (c) 600-700^oC

The explanation is: Nitralloy steels are commonly used in nitriding process. These steels are hardened by oil quenching from 900^oC and tempered at 600-700^oCbefore nitriding.

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