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Question

If carbon present in cast iron is partly free and partly in combined state, it is called ________ .

A.

white cast iron

B.

grey cast iron

C.

molten cast iron

D.

none of these

Answer ( Option A)

white cast iron

Solution

Most white cast iron contain less than 4.3% carbon with low silicon contents to inhibit the precipitation of carbon as graphite. It is extremely hard and brittle.

Hence, the correct option is (A).

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