gray iron

noun

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

Word History and Origins

Origin of gray iron¹

First recorded in 1655–65

Example Sentences

Mild steel is a good test, and a light gray iron is admirable for practice lessons.

From Project Gutenberg

In this case, as well as in Figs. 32 and 33, both the field and the armature are made of soft gray iron.

From Project Gutenberg

At one point, not far from Cle-ellum River, a bed of gray iron ore crosses the magnetic ore at right angles.

From Project Gutenberg

An average of over 400 tons of iron is poured daily, and 426 tons of gray iron have been poured in a single day.

From Project Gutenberg

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

From Project Gutenberg