The percentage of carbon in grey iron castings usually varies between

The percentage of carbon in grey iron castings usually varies between Correct Answer 2.5 to 4.5%

Most cast irons have a chemical composition of 2.5 - 4.0% carbon, 1 - 3% silicon, and the remainder iron.
Grey cast iron has less tensile strength and shock resistance than steel, but its compressive strength is comparable to low- and medium-carbon steel.
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