United States Steel Corporation produces and sells flat-rolled and tubular steel products primarily in North America and Europe. The company operates through North American Flat-Rolled (Flat-Rolled), Mini Mill, U. S. Steel Europe (USSE), and Tubular Products (Tubular) segments. The Flat-Rolled segment offers slabs, strip mill plates, sheets, and tin mill products, as well as iron ore, pellets, pig iron, and coke. This segment serves customers in the automotive, appliance, construction, container, pipe and tube, sheet converter, solar, industrial equipment and service center markets. The Mini Mill segment provides hot-rolled, cold-rolled, and coated sheets and electrical steel products. This segment serves customers in the automotive, construction, pipe and tube, sheet converter, electrical, solar industrial equipment, and service center markets. The USSE segment provides slabs, hot-rolled, cold-rolled, hot-dip galvanized, and color-coated coils, electrical steel, strip mill plate, sheet, tin mill products, and spiral welded pipes. This segment serves customers in the automotive, construction, container, appliance and electrical, service center, conversion, oil, gas, and petrochemical markets. The Tubular segment offers rounds, seamless, and electric resistance welded steel casing and tubing products, as well as standard and line pipe and mechanical tubing products to oil, gas, and petrochemical sectors. It also engages in the real estate business. United States Steel Corporation was founded in 1901 and is headquartered in Pittsburgh, Pennsylvania.