Q. Which one of the following contains maximum percentage of carbon? Answer:
Cast iron
Notes: Cast Iron is a hard, brittle, nonmalleable iron-carbon alloy, cast into shape, containing 2 to 4.5 percent carbon. Steels contain less 0.2% to 2.0% of carbon, while all cast irons contain more than 2% carbon. Wrought iron is an iron alloy with very low carbon (0.04 to 0.08%) content.