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

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