Pick out the correct statement?

6775Chemical EngineeringMedium

ATempering of a material improves ductility & toughness but reduces hardness & brittleness

BHot worked materials are subjected to annealing to remove internal stresses

CNormalising of a material induces stresses

DAnnealing of steel hardens it slightly

Correct answer

A. Tempering of a material improves ductility & toughness but reduces hardness & brittleness

Explanation

The correct answer is Tempering of a material improves ductility & toughness but reduces hardness & brittleness.

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