U. S. Steel Board Advances Capital Investments, Announces New Projects in Pennsylvania and Indiana

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PITTSBURGH--(BUSINESS WIRE)--Sep 24, 2025--

The Board of Directors at U. S. Steel has approved the next phase of capital investment plans, marking another milestone in the strategic partnership between Nippon Steel and U. S. Steel. The cooperative efforts between the two industry leaders have already yielded significant successes. Nippon Steel experts have worked closely with U. S. Steel’s integrated mills in the North American Flat-Rolled, Big River Steel Works and Tubular Products segments to enhance operational efficiencies, among other achievements.

In Pennsylvania, U. S. Steel is submitting an “air construction permit” for a new slag recycler at its Edgar Thomson Plant for approval from the Allegheny County Health Department. The Edgar Thomson Plant, located about 10 miles southeast of Pittsburgh in Braddock, Pennsylvania, is where basic steel production takes place. After permit approval, engineering planning will be finalized, and construction is expected to begin next year. The project is expected to cost approximately $100 million.

A slag recycler helps give new life to the byproducts of steelmaking—such as providing ingredients for cement. This is an opportunity to reduce air emissions and waste that would have otherwise gone to a landfill, while also generating additional revenue through the sale of byproducts.

The Board also approved a new proposal to invest approximately $200 million to improve the Gary Works hot strip mill to optimize production costs and expand premium product offerings, including heavy gauge line pipe and automotive steel. Gary Works is U. S. Steel's largest manufacturing plant, situated on the south shore of Lake Michigan in Gary, Indiana. It is comprised of both steelmaking and finishing facilities.

These two projects represent only a fraction of the activity underway as part of Nippon Steel’s investments in U. S. Steel. Across the company, multiple initiatives are advancing to upgrade infrastructure, enhance capabilities, and modernize facilities for the future.

About U. S. Steel

Founded in 1901, U. S. Steel delivers profitable and sustainable steel solutions. Propelled by its talented employees and an unwavering focus on safety, U. S. Steel serves the automotive, construction, appliance, energy, containers, and packaging industries with high value-added steel products. Steel production begins with our competitively advantaged iron ore production capabilities which fuel our integrated steelmaking facilities and investments in electric arc furnaces. To help our customers create the best products with the fewest emissions, we are committed to reaching net-zero greenhouse gas emissions by 2050. U. S. Steel is at the forefront of creating steels that are stronger, lighter, and better for the environment. This includes our proprietary XG3® advanced high-strength steel, verdeX® steel produced with 70-80% lower CO2 emissions with a recycled content of up to 90%, and ultra-thin lightweight InduX™ steel for electric vehicles, generators, and transformers. U. S. Steel maintains operations across the United States and in Central Europe and is headquartered in Pittsburgh, Pennsylvania. For more information, please visit www.ussteel.com and follow U. S. Steel on LinkedIn, Instagram, Facebook, and X.

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KEYWORD: UNITED STATES JAPAN NORTH AMERICA ASIA PACIFIC INDIANA PENNSYLVANIA

INDUSTRY KEYWORD: STEEL MANUFACTURING

SOURCE: United States Steel Corporation

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PUB: 09/24/2025 05:00 PM/DISC: 09/24/2025 04:59 PM

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