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Which of the following pairs regarding the effect of alloying elements in steels are not matched correctly ?

Question: Which of the following pairs regarding the effect of alloying elements in steels are not matched correctly ?
[A].

Cobalt: It contributes to rerl hardness by hardening ferrite.

[B].

Molybdenum: It forms abrasion resisting particles.

[C].

Phosphorous: It improves machinability in free cutting steels.

[D].

Silicon: It reduces oxidation resistance.

Answer: Option A

Explanation:

No answer description available for this question.