AK Steel Corporation is a publicly traded Fortune 500 company that maintains manufacturing plants and sales offices in Ohio, Indiana, Kentucky and Pennsylvania. It produces a variety of carbon, stainless and electrical steel products. The corporation serves several clients in the automotive, appliance, construction and manufacturing markets. AK Steel Corporation also offers carbon and stainless tubular steel products. It provides products under the Black Coat brand. The corporation has annual sales revenue of more than $7 billion. AK Steel Corporation s production facilities have achieved ISO 9001:2000 certification. It has coating, rolling, carbon melting, and electrical and stainless processing capabilities. The corporation operates a subsidiary, AK Coatings.