The title of the largest steel producer in the United States has historically shifted among major domestic manufacturing giants based on annual metric tonnage output, facility acquisitions, and market consolidations. Industry leaders such as Nucor Corporation and Cleveland-Cliffs frequently vie for the top domestic market position, with Nucor widely recognized as the largest steel manufacturer by production volume and overall market capitalization, utilizing advanced electric arc furnace technology to recycle scrap metal into finished structural steel, sheet products, and commercial building materials.