The Percentage of Carbon in Cast Iron Varies from A. 0.5 to 1 B. 1 to 1.7 C. 1.7 to 4.5 D. 0.1 to 0.5

Answer: C

Explanation: Cast iron is a kind of iron–carbon alloys with more than 2% carbon content.  Its utility stems from the fact that it has a low melting point. When white cast iron is split, carbide impurities allow cracks to travel straight through; grey cast iron has graphite flakes, which deflect a passing crack and generate a slew of new cracks as the material breaks.

Cast iron is a ferrous alloy that contains more than 2% carbon. Though it can include any amount of carbon from 2% to 6.67 percent, it is most found in the range of 2% to 4%.