The percentage of carbon in gray cast iron is in the range of
A.0.25 to 0.75 percent
B.1.25 to 1.75 percent
C.3 to 4 percent
D.8 to 10 percent
Answer: C
Gray cast iron is the most widely used of all cast irons. In fact, it is common to speak of gray cast iron just as cast iron. It contains 3 to 4?nd 2.5 % Si.