About:Nucor Corporation is an American company based in Charlotte, North Carolina, that produces steel and related products. It is the largest steel producer in the United States and the largest recycler of scrap in North America. Nucor is the 16th-largest steel producer in the world. Along with Commercial Metals Company, it is one of two primary suppliers of rebar used to reinforce concrete in buildings, bridges, roads, and infrastructure in the U.S.