Nucor Corporation manufactures and sells steel products. Principal steel products are hot-rolled steel (angles, rounds, flats, channels, sheet, wide-flange beams, pilings, billets, blooms and beam blanks), cold-rolled steel, cold finished steel, steel joists and joist girders, steel deck, steel fasteners and steel grinding balls. Nucor is the largest recycler in the United States. Nucor and affiliates are manufacturers of steel products, with operating facilities in fourteen states.