Nippon Steel to Invest Up to $2.5 Billion in Pennsylvania Steel Facilities

Nippon Steel Corp. will invest up to $2.5 billion in United States Steel Corp.’s facilities in Pennsylvania over three years, according to a document released by the Japanese steelmaker’s U.S. subsidiary, Kyodo News reported.

Nippon Steel plans a multibillion-dollar investment to modernize U.S. Steel operations. (Photo: VIETNAM STEEL)

The projected investment in Mon Valley Works is significantly larger than the pledge of at least $1 billion made by Nippon Steel before turning the struggling U.S. producer into a wholly owned subsidiary last year.

According to the newly released economic impact analysis, the total investment in the Pittsburgh-area operation is expected to range from approximately $2 billion to $2.5 billion.

The planned investment centers on the Edgar Thomson Plant in Braddock and will also include replacing an aging hot strip mill scheduled for decommissioning at the nearby Irvin Plant.

According to U.S. Steel, the replacement facility will improve Mon Valley Works’ ability to produce steel for high-value markets, including the automotive industry.

While President Donald Trump initially opposed Nippon Steel’s plan to acquire U.S. Steel on national security grounds, he later changed his position after returning to the White House in January 2025.