Q
Age hardening is a process done at______________?
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A
A. Heating up to 200 – 450°c for 15 – 30 min and quenching in water
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B
B. Heating at 700°c for 10 – 15 min and quenching in water
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C
C. Heating at 700°c for 1 hour and quenching in water
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D
D. Heating above 700°c for 30 min and quenching in water
Correct Answer:
A. A. Heating up to 200 – 450°c for 15 – 30 min and quenching in water
