Nucor Corp manufactures steel and steel products. The company also produces direct reduced iron for use in its steel mills. The operations include international trading and sales companies that buy and sell steel and steel products manufactured by the company and others. The operating business segments are: steel mills, steel products, and raw materials, the steel mills segment derives maximum revenue. The steel mills segment includes carbon and alloy steel in sheet, bars, structural and plate; steel trading businesses; rebar distribution businesses; and Nucor's equity method investments in NuMit and NJSM.