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Carnegie began to see that steel was eventually going to replace iron for the manufacture of rails, structural shapes, pipe, and wire. In 1873 he organized a steel rail company. The first steel furnace at Braddock, Pennsylvania, began to roll rails in 1874.
Andrew Carnegie, Andrew W. Mellon, and Richard B. Mellon. The university was formed by the merger of Carnegie Institute of Technology, founded in 1900 by industrialist and philanthropist Andrew Carnegie, and the Mellon Institute of Industrial Research, founded in 1913 by Andrew and Richard Mellon.