Factory/PlantSteel & metalsOverseas

U.S. Steel to build new hot-strip mill at Mon Valley Works

United States Steel CorporationMon Valley, PennsylvaniaPublished Oct 23, 2026

Investment$3B

PhasePlanned

Start—

CompletionJul 2029

To completion

Today

202720282029

About 33 months to scheduled completion.

United States Steel Corporation, a wholly owned subsidiary of Nippon Steel Corporation, will build new hot-rolling equipment at the Edgar Thomson Works in Pennsylvania's Mon Valley Works. The approximately $3 billion investment will replace aging equipment and expand annual production capacity from approximately 2.2 million tonnes to approximately 3.5 million tonnes, with operations scheduled to begin in the second half of 2029 after permits are obtained.

Project facts

Owner: United States Steel Corporation
Listing: 5401 Tokyo
Facility: Factory/Plant
Sector: Steel & metals
Location: Mon Valley, Pennsylvania (overseas)
Investment: $3B — approximately
Scale / capacity: approximately 3.5 million tonnes/year
Completion: Jul 2029
Announced: Oct 23, 2026

Figures and schedules are as announced by the company or the public body concerned; plans can change. Amounts that were not disclosed are recorded as not disclosed, never estimated.

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