For a steel containing 0.8% carbon
A. There is no critical point
B. There is only one critical point
C. There are two critical points
D. There can be any number of critical points
Answer: Option B
Solution (By Examveda Team)
When steels with exactly 0.8% carbon (known as a eutectoid steel), are cooled, the austenitic phase (FCC) of the mixture attempts to revert to the ferrite phase (BCC).There is only one critical point in eutectoid steel which contains 0.8% carbon.
This Question Belongs to Mechanical Engineering >> Engineering Materials
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