Tempering of a material does not improve its____________________?
Correct answer: A. Machinability
- A. Machinability
- B. Toughness
- C. Internal stress level
- D. Softness
Explanation
Tempering relieves internal stresses, reduces hardness and improves toughness, while machinability is chiefly improved by processes such as annealing. Therefore, machinability is not regarded as a direct improvement due to tempering in this standard classification.
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