Nippon Steel has announced plans to build a new hot-strip mill at U.S. Steel’s Mon Valley Works, with the investment expected to total approximately $3 billion (¥470 billion). The facility is expected to be the largest of its kind for the company.
Nippon Steel has decided to build a new hot-strip mill at Mon Valley Works, owned by U.S. steelmaker U.S. Steel. The investment is expected to total approximately $3 billion (¥470 billion), with the new facility intended to strengthen production capacity at the company’s U.S. operations.
U.S. Steel was acquired by Nippon Steel in 2025, and the new construction plan is expected to proceed as part of the post-acquisition business integration. The article does not specify the planned start of operations or other details.
The new hot-strip mill is expected to be large in scale for the company, with the aim of expanding supply capacity by strengthening the production lines at Mon Valley Works.