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__________ element is responsible for “cold shortness”.

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__________ element is responsible for “cold shortness”.

(a) Manganese

(b) Carbon

(c) Phosphorus

(d) Sulphur

This question was addressed to me in my homework.

This intriguing question comes from Steel and its Alloys-2 topic in portion Steel and its Alloys of Aerospace Materials & Processes

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Correct option is (c) Phosphorus

The explanation is: The element phosphorus is the cause of the phenomenon “cold shortness” or brittleness. This happens when metal is cold.  Phosphorus is an undesirable element in steels. It should not be present in more than 0.05% in quantity.

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