Hardened steel is softened by___________________?
Correct answer: B. Tempering
- A. Normalising
- B. Tempering
- C. Annealing
- D. Carburising
Explanation
Tempering reheats hardened steel below its critical temperature, reducing brittleness and hardness while retaining useful strength. Annealing produces greater softening, but tempering is the standard treatment specifically applied after hardening.
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