The best description of Temper embrittlement is:

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The best description of Temper embrittlement is:
A . Cracking due to operating at high temperatures above 650°F C 1100°F
B . Cracking due to low temperature service
C . Loss of ductility and notch toughness due to exposure above 650°F C 1100°F
D . Flaking of the metal surfaces, causing dip pits due to exposure above 650ºF C1100°F

Answer: C