AK Steel Holding ( AKS), a producer of flat-rolled carbon, stainless and electrical steel products and other steel products, said its second quarter earnings more than tripled, as previous year quarter includes a huge one time charge. The Middletown, Ohio-based company earned $29.1 million, or 26 cents a share, in the quarter, compared with $9 million, or 8 cents a share, a year ago. Analysts were expecting earnings of 22 cents a share. Second-quarter revenue rose 2.9% from a year ago to $1.49 billion, on shipments of 1,599,100 tons, compared with 1,610,500 tons shipped in the year-ago quarter. Analysts were expecting a revenue of $1.48 billion in the most recent quarter. The company expects to ship about 1,600,000 tons in the third quarter. Operating profit for the third quarter is expected to be $45 per shipped ton to $50 per shipped ton. Second-quarter operating income fell 15.1% from a year ago to $63 million and operating margin dropped 89 basis points to 4.2%. The company said its average selling price was $936 per ton, up from $903 per ton in the second quarter of 2005. The company's stock was trading up 30 cents, or 2.5%, to $12.56 Tuesday.