Granite City Steel is a steel manufacturing company located in Granite City, Illinois. It primarily produces flat-rolled steel products, which are essential for various industries, including automotive and construction. The facility has a long history, dating back to the early 20th century, and has undergone several changes in ownership and production capacity over the years. The company is part of the United States Steel Corporation, which is one of the largest steel producers in the country. Granite City Steel plays a crucial role in the local economy by providing jobs and supporting related businesses in the region.