Nucor is a company specializing in steel and steel products. It operates in three business segments: steel mills, downstream steel products, and raw materials. Its steel mills segment includes hot-rolled steel and cold-rolled steel. The steel products segment provides steel joists and joist girders, steel deck, cold finished steel, steel fasteners, metal building systems, and light gauge steel framing. The raw materials segment produces high-quality direct reduced iron (DRI), as well as engages in scrap metal brokerage, ferrous and nonferrous metal recycling and transportation services.