Nucor Corporation manufactures steel and a broad range of steel products. The company operates through three reportable segments: steel mills, steel products, and raw materials. Most of its revenue comes from the steel mills segment, which produces sheet steel, including hot-rolled, cold-rolled, and galvanized products, as well as plate steel, structural steel, and bar steel products. Nucor primarily makes steel from scrap steel and scrap steel substitutes using electric arc furnaces, supported by continuous casting and automated rolling mills. Its steel mills segment primarily serves steel service centers, fabricators, and manufacturers across the United States, Canada, and Mexico.