The Carnegie Steel Company was an American steel producer founded by Andrew Carnegie in the late 19th century. It played a significant role in the industrial revolution by producing large quantities of steel, which was essential for building infrastructure like railroads, bridges, and buildings. The company became one of the largest and most profitable steel manufacturers in the United States. In 1901, Carnegie Steel Company was sold to J.P. Morgan and merged with other steel companies to form the United States Steel Corporation. This merger marked the beginning of a new era in the steel industry, consolidating production and increasing efficiency, which helped shape the modern economy.