PITTSBURGH, Feb. 1, 2016 United States Steel Corporation and its U. S. Steel Tubular Products, Inc. subsidiary today announced that its United Steelworkers-represented employees have ratified new three-year collective bargaining agreements. The agreements cover approximately 18,000 employees at the company's domestic flat-rolled and iron ore mining facilities as well as tubular operations in Fairfield, Ala., Lorain, Ohio and Lone Star, Texas.