About Mon Valley Works
U. S. Steel’s Mon Valley Works is an integrated steelmaking operation that includes four PA facilities:
- Clairton Plant (Clairton, PA) produces coke and coke byproducts. Coke is the fuel, similar to charcoal, for blast furnaces to convert iron ore into liquid iron.
- Edgar Thomson Plant (Braddock, PA) produces liquid iron in blast furnaces using coke from Clairton and iron ore from Minnesota. Iron is converted into steel and cast into slabs.
- Irvin Plant (West Mifflin, PA) processes the slabs in a hot-roll mill to produce coils of steel.
- Fairless Plant (Fairless Hill, PA) is outside of Philadelphia and produces galvanized steel sheets.
Clairton Plant
Clairton Plant is located approximately 20 miles south of Pittsburgh in Clairton, Pennsylvania, and sits along the west bank of the Monongahela River. The largest coke manufacturing facility in the United States, Clairton Plant operates six coke oven batteries and produces approximately 3.6 million tons of coke annually. The facility serves customers in the commercial coke market as well as U. S. Steel’s steelmaking facilities at Mon Valley’s Edgar Thomson Plant near Pittsburgh, and in Gary, Indiana. Coke oven gas created during the coking process is recycled to conserve natural gas and power our facilities in the Mon Valley region.
Watch a brief video to learn more about the process used to transform coal into coke, a critical raw material in the steelmaking process.
Click here to view diagrams depicting the cokemaking process as well as process flowlines at Clairton Plant.
Edgar Thomson Plant
Edgar Thomson Plant, located about 10 miles southeast of Pittsburgh in Braddock, Pennsylvania, is where basic steel production takes place at Mon Valley Works. Raw materials are combined in blast furnaces to produce liquid iron, which is then refined to create steel. Steel slabs from the facility are sent by rail to the nearby Irvin Plant in West Mifflin, where they are rolled into a number of different sheet products that serve customers in the appliance, automotive, metal building and home construction industries. Mon Valley Works has an annual raw steel production capability of 2.9 million net tons.
Irvin Plant
Irvin Plant, located in West Mifflin, Pennsylvania, rolls and treats steel slabs produced at the nearby Edgar Thomson Plant to meet customer specifications. Major sheet products manufactured at the Irvin Plant include hot-rolled, cold-rolled and coated sheet in addition to products for special applications, such as embossed sheet, Vitrenamel™ sheet, and commercial bright sheet. Sheet products from Mon Valley Works serve customers in the appliance, automotive, metal building, and home construction industries.
Fairless Plant
Fairless Plant, located in Fairless Hills, Pennsylvania, near Philadelphia, operates a galvanizing line that processes cold-rolled products produced at Mon Valley’s Pittsburgh-area facilities. Sheet products from the Mon Valley Works serve customers in the appliance, automotive, metal building and home construction industries.
Other Pittsburgh-Area Locations
The U. S. Steel Tower, which is situated in downtown Pittsburgh, Pennsylvania, serves as the headquarters for U. S. Steel and Nippon Steel North America. When its construction was completed in 1971, the building, which features U.S. Steel’s COR-TEN® steel, was considered to be an engineering masterpiece and was featured in many architectural and engineering magazines. The tower, once the tallest building between New York and Chicago at 841 feet and 64 stories, is the tallest building in downtown Pittsburgh, which is situated at the confluence of the Monongahela, Allegheny and Ohio rivers.
The Pittsburgh Service Center houses the company’s administrative and information technology services and is located in Pittsburgh’s South Side neighborhood.
U. S. Steel’s Research and Technology Center is committed to developing cutting-edge products, creating innovative technical solutions and providing world-class support to the company’s operations worldwide. Located in Munhall, Pennsylvania, on a portion of the site once occupied by the company’s historic Homestead Works, the state-of-the-art facility is LEED (Leadership in Energy and Environmental Design) certified. The building includes a wide array of advanced safety features, technology and energy efficiencies. In addition to traditional laboratory and office space, the bright and open facility houses a multidisciplinary technical library, full microscopy facilities, materials testing laboratories and several development facilities that simulate all aspects of steel production.
U. S. Steel’s operations in Pennsylvania (in FY22)
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U. S. Steel employees in PA
Jobs supported and sustained (direct & indirect) in PA
State & local tax revenue generated
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PA-based suppliers