AK Steel Holding Corporation is an integrated producer of flat-rolled carbon, stainless and electrical steels and tubular products through its subsidiary, AK Steel Corporation (AK Steel). The Company operates approximately eight steelmaking and finishing plants, over two coke plants and approximately two tube manufacturing plants across states, which include Indiana, Kentucky, Michigan, Ohio, Pennsylvania and West Virginia. These operations produce flat-rolled carbon, specialty stainless and electrical steels that it sells in sheet and strip form, and carbon and stainless steel that it finishes into welded steel tubing. The Company also produces metallurgical coal through its subsidiary, AK Coal Resources, Inc. (AK Coal). In addition, the Company operates trading companies in Mexico and Europe that buy and sell steel and steel products and other materials. It sells flat-rolled carbon steel products, consisting of coated, cold-rolled, and hot-rolled carbon steel products.