Softening of hardened steel is done by its_____________________?
Correct answer: B. Tempering
- A. Normalising
- B. Tempering
- C. Annealing
- D. Carburising
Explanation
Tempering softens hardened steel by controlled reheating, relieving internal stresses and reducing brittleness. Annealing can soften steel further, but the usual answer for softening hardened steel is tempering.
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