gray iron

American  

noun

1. pig iron or cast iron having much of its carbon in the form of graphite and exhibiting a gray fracture.

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Etymology

Origin of gray iron

First recorded in 1655–65

Example Sentences

To enter 732 S. Vermont Ave., you must carefully shove open a rusted gray iron gate until a gap large enough for you to slide through sideways appears.

From Los Angeles Times • Jan. 29, 2022

Above the dark gray iron, stone walls formed the North Tower.

From "Huntress" by Malinda Lo

The pistons as provided in the A-7 engines are cast from a mixture of steel and gray iron.

From Aviation Engines Design?Construction?Operation and Repair by Pag?, Victor Wilfred

“And the gray iron foundry over there uses three times as much iron as we do, and it made more than 12,000,000.”

From The Romance of the Reaper by Casson, Herbert Newton

Such proportions will make a soft, even grained, dark gray iron, whose crystals are small and bright, and whose fracture will be uneven and sharp to the touch.

From Scientific American Supplement, No. 344, August 5, 1882 by Various