Which of the following statement is correct?

A. The product produced by blast-furnace is called cast iron

B. The pig iron is the name given to the product produced by cupola

C. The cast iron has high tensile strength

D. The chilled cast iron has no graphite

Answer: Option D

Solution(By Examveda Team)

Chilled cast iron. Iron-carbon alloy with low graphitization factor so that chill occurs forming a graphite-free structure.
In order to achieve chilling, the silicon content is set to a low level depending on the wall thickness of the casting; the carbon content is approx. 2.5 to 3.8%.