The approximate eutectoid temperature of this alloy that has 6.0 wt% Mn is 650°C or 1330°F.
From the information given, the approximate eutectoid temperature of this alloy that has 6.0 wt% Mn is 650°C. This can be converted to Fahrenheit as:
= (650 × 2) + 30
= 1300 + 30
= 1330F
The proeutectoid phase when this alloy is cooled to a temperature just below the eutectoid will be ferrite. It's a ceramic like material with magnetic properties.
The relative amounts of the proeutectoid phase will be:
= (0.62 - 0.20)/062
= 0.68
Similarly, the relative amount of the pearlite will be:
= 0.20/0.62
= 0.32
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