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Which of the following factors affect the hardenability of a material?

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Which of the following factors affect the hardenability of a material?

(a) Composition of steel

(b) Grain size

(c) Temperature of specimen

(d) Quenching medium

I had been asked this question during an internship interview.

Asked question is from Hardening and Hardenability in chapter Heat Treatment of Engineering Material & Metallurgy

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The correct choice is (c) Temperature of specimen

The explanation: The hardenability of the material can be measured using the Jominy end-quench test method. The composition of steel, austenitic grain size, structure before quenching, and quenching medium and method affect the hardenability of the steel.

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