The United Steel Companies were a steel making, engineering, coal mining and coal by-product group based in South Yorkshire and Lincolnshire. The company was registered in 1918 and the following year saw a joining together of steel makers Samuel Fox and Company of Stocksbridge; Steel, Peech and Tozer of Templeborough and Ickles in Rotherham; the Appleby-Frodingham Steel Company of Scunthorpe; and the coal mining and by-products interests of Rother Vale Collieries at Orgreave, Treeton and Thurcroft. The iron and steel works on nationalisation, in 1967, became part of British Steel Corporation and the mining interests passed to the National Coal Board. The coal by-products plants came under the ownership of a subsidiary, The United Coke and Chemical Company.