The lower critical temperature

A Decreases as the carbon content in steel increases
B Increases as the carbon content in steel increases
C Is same for all steels
D Depends upon the rate of heating

Correct Answer: Is same for all steels

The lower critical temperature is same for all steels.
Lower critical temperature for steel’s austenite-to-pearlite transformation is 1333°Fahrenheit (723°Celsius). Below this temperature, austentite doesn’t exist.
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