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Molybdenum decreases the ___________ of material.

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Molybdenum decreases the ___________ of material.

(a) elastic limit

(b) grain size

(c) homogeneity

(d) impact value

The question was posed to me during an internship interview.

This is a very interesting question from Steel and its Alloys-2 in chapter Steel and its Alloys of Aerospace Materials & Processes

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Correct option is (b) grain size

Best explanation: Molybdenum is a very productive element in steel. It decreases the grain size. It also increases the homogeneity, elastic limit and impact value. Steels containing molybdenum also exhibit an increase in air-hardening properties.

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