It marks another step in the company's expansion in Pittsburgh following its acquisition of U.S. Steel.

Nippon Steel has finalized its deal to buy 100% of U.S. Steel, the iconic steelmaker that was once the world’s most valuable company and a cornerstone of American industrial might. The purchase comes ...

NEW YORK (AP) — United States Steel on Tuesday detailed its billion-dollar multiyear growth plan with new owner Nippon Steel that includes modernizing the century-old steelmaker. The announcement ...

The fatal explosion last week at U.S. Steel's Pittsburgh-area coal-processing plant has revived debate about its future just as the iconic American company was emerging from a long period of ...