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Discussion

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.

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