WEST CHESTER, Ohio
March 22, 2013
/PRNewswire/ -- AK Steel (NYSE: AKS) said that
the United States
Court of Appeals for the Federal Circuit denied, on
March 20, 2013
, ArcelorMittal's petition for re-hearing in its patent infringement lawsuit involving aluminized boron steel.
This week's court decision again confirms that AK Steel does not infringe the patent and can sell its ULTRALUME® aluminized boron steel product. AK Steel's ULTRALUME® product is utilized for hot-stamped, press-hardened applications where the ultimate tensile strength is less than 1,500 MPa.
AK Steel's ULTRALUME® is an advanced high-strength steel that is growing in popularity for various automotive applications. AK Steel said that ULTRALUME® has been accepted for use by numerous automotive original equipment manufacturers (OEMs).
AK Steel produces flat-rolled carbon, stainless and electrical steels, primarily for automotive, infrastructure and manufacturing, construction and electrical power generation and distribution markets. The company employs about 6,100 men and women in
; and its corporate headquarters in
, Ohio. Additional information about AK Steel is available on the company's web site at
AK Tube LLC, a wholly-owned subsidiary of AK Steel, employs about 300 men and women in plants in
and Columbus, Indiana. AK Tube produces carbon and stainless electric resistance welded (ERW) tubular steel products for truck, automotive and other markets. Additional information about AK Tube LLC is available on its web site at
AK Coal Resources, Inc., another wholly-owned subsidiary of AK Steel, controls and is developing metallurgical coal reserves in
, Pennsylvania. AK Steel also owns 49.9% of Magnetation LLC, a joint venture headquartered in
Grand Rapids, Minnesota
, which produces iron ore concentrate from previously mined ore reserves.
SOURCE AK Steel