Answer: D- 1.7 to 4.5
The percentage of carbon in cast iron varies from 1.7 to 4.5.
Cast iron is an alloy of iron, carbon, and silicon which tends to be brittle and hard. It is made directly from molten pig iron, and depending upon the application, carbon and silicon content are adjusted to the desired levels.
The percentage of carbon in cast iron varies from 1.7 to 4.5. Gray cast iron, White cast iron, Ductile cast iron, and Malleable cast iron are the major types of cast iron.
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