a ferroalloy containing up to 70 percent chromium.
Also, ferrochrome [fer-uh-krohm] .

1875–80; ferro- + chromium

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World English Dictionary
ferrochromium or ferrochrome (ˌfɛrəʊˈkrəʊmɪəm)
an alloy of iron and chromium (60--72 per cent), used in the production of very hard steel
ferrochrome or ferrochrome

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Encyclopedia Britannica


alloy of chromium with 30 to 50 percent iron, used to incorporate chromium into steel. It is produced in an electric furnace using chromium ore, iron or iron ore, and carbon, usually anthracite coal. In the intense heat the carbon reduces the metal oxides to the molten alloy, which is poured out into slabs

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Ferrochromium-Ferrochromium production is electrical energy intensive.
Most chromite ore is smelted in an electric arc furnace to produce
  ferrochromium for use by the metallurgical industry.
Stainless steel manufacture is the major end use of ferrochromium.
The ferrochromium industry developed in close proximity to the stainless steel
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