ferroalloy

[ fer-oh-al-oi, -uh-loi ]
/ ˌfɛr oʊˈæl ɔɪ, -əˈlɔɪ /

noun

an alloy of iron with some element other than carbon, used to introduce the element in the manufacture of steel.

Origin of ferroalloy

First recorded in 1900–05; ferro- + alloy