13) In nitriding process ammonia gas is produced at
500 Degree Centigrade to 560 Degree Centigrade
Related Heat Treatment MCQ - Machinist(Set-1) with Answers
550 Degree Centigrade to 600 Degree Centigrade
723 Degree Centigrade
The lower critical temperature is same for all steels Lower critical temperature for steel’s austenite-to-pearlite transformation is 1333 ºF (723 ºCelsius). Below this temperature, austentite doesn’t exist.