Republic Steel is an American steel manufacturing company that was founded in 1899. It became one of the largest producers of steel in the United States, particularly known for its production of steel for the automotive and construction industries. The company played a significant role in the industrial growth of the nation, especially during the mid-20th century. Throughout its history, Republic Steel underwent various mergers and acquisitions, expanding its operations and product offerings. The company faced challenges in the late 20th century due to economic changes and competition, leading to restructuring efforts. Today, it is part of LTV Steel, continuing to contribute to the steel industry.