For a medium carbon steel, having a 0.50% carbon content, slow cooling of austenite will cause austenite to transform to carbide and ferrite. Rapid quenching of austenite can result in:

retention of austenite, even at room temperature which gives a very ductile and tough steel

formation of martensite, which produces a very hard and brittle steel

retention of austenite, even at room temperature which gives a very ductile and tough steel

formation of large carbide particles near the grain boundaries in the steel, which makes the steel brittle but very tough

retention of austenite, even at room temperature, which gives a very brittle and hard steel

For a medium carbon steel, having a 0.50% carbon content, slow cooling

1.	For a medium carbon steel, having a 0.50% carbon content, slow cooling of austenite will cause austenite to transform to carbide and ferrite. Rapid quenching of austenite can result in:
A.	formation of martensite, which produces a very hard and brittle steel
B.	retention of austenite, even at room temperature which gives a very ductile and tough steel
C.	formation of large carbide particles near the grain boundaries in the steel, which makes the steel brittle but very tough
D.	retention of austenite, even at room temperature, which gives a very brittle and hard steel
Answer» B. retention of austenite, even at room temperature which gives a very ductile and tough steel

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For a medium carbon steel, having a 0.50% carbon content, slow cooling of austenite will cause austenite to transform to carbide and ferrite. Rapid quenching of austenite can result in:

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