Q25
The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is
A.
770°C
AnswerB.
910°C
C.
1050°C
D.
Below recrystallization temperature
Answer: Option A
Solution
Answer: Option A
Solution:
Below 773°C (1,423°F), alpha iron becomes ferromagnetic (i.e., capable of being permanently magnetized), indicating a change in electronic structure but no change in crystal structure.