<Tr> <Th> Products </Th> <Td> steel, coal, coke, railroad Flat - rolled steel Tubular steel </Td> </Tr> <Tr> <Th> Services </Th> <Td> manufacturing </Td> </Tr> <P> Carnegie Steel Company was a steel producing company primarily created by Andrew Carnegie and several close associates, to manage businesses at steel mills in the Pittsburgh, Pennsylvania area in the late 19th century . The company formed in 1892 and was subsequently sold in 1901 in one of the largest ever business transactions of the early 20th century, to become the major component of the United States Steel Corporation . The subsequent sale made Carnegie one of the richest men in history . </P> <P> Carnegie began the construction of his first steel mill, the Edgar Thomson Steel Works in 1872 at Braddock, Pennsylvania . The Thomson Steel Works began producing rails in 1874 . By a combination of low wages, efficient technology infrastructure investment and an efficient organisation, the mill produced cheap steel, which sold for a large profit in the growing markets of industrial development . Carnegie alone estimated that 40% was returned on the investment i.e. a profit of $40,000 from a $100,000 investment in the mill . </P>

Who sold the corporation that became united states steel corporation