What is the range of tempering temperature (°C) for most of the materials ?
Correct answer: B. 200-300
- A. 75-100
- B. 200-300
- C. 350-450
- D. 500-600
Explanation
Tempering is commonly carried out in the moderate range of about 200–300°C to reduce brittleness while retaining useful hardness. Higher ranges are associated with high-temperature tempering and produce greater softening.
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