Full annealing practice for hypo-eutectoid steel In full annealing of a hypo-eutectoid steel, the steel is heated to 30–50°C above the upper critical temperature and then cooled how? Choose the correct option.
Mechanical Engineering
Engineering Materials
Difficulty: Easy
Choose an option
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AIn still air (air cooling)
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BSlowly in the furnace (furnace cooling)
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CSuddenly in a quench medium
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DAny one of these
Answer
Correct Answer: Slowly in the furnace (furnace cooling)
Explanation
ConceptFull annealing of hypo-eutectoid steels: heat to about 30–50°C above A₃ to form homogeneous austenite and cool slowly in the furnace. This promotes full transformation to coarse pearlite/ferrite and produces maximum softness and ductility.
Final AnswerSlowly in the furnace (furnace cooling)