Harsco Corp., Harrisburg, Pa., acquired the Industrial Services Division of C.J. Langenfelder & Son, Inc., a Baltimore-based provider of on-site, outsourced steel mill services. The acquisition expands Harsco's existing European relationship with U.S. Steel to encompass several of the steelmaker's domestic operations, and also expands Harsco's relationship with International Steel Group (ISG) and its former Bethlehem Steel operations. Langenfelder provides basic mill services to six separate U.S. Steel and ISG locations, including U.S. Steel's Gary Works and the Bethlehem Steel-Sparrows Point plant now owned and operated by ISG. In total, Langenfelder services an estimated 6.8 million tons of liquid steel production per year at its various U.S. locations. Harsco will integrate Langenfelder's operations into its Heckett MultiServ mill services unit.