Mountain State Carbon LLC

Quality Rolls is a part of Superior Forge & Steel, which is a fully integrated forged steel roll providing company that was formerly known as Superior Forge & Steel Corporation and was established in 1991. It has a team of personnel who have experience in melting, forging, heat treating and machining technologies. The company s primary product includes forged, hardened steel rolls for the hot and cold rolling of ferrous and nonferrous materials. Quality Rolls also offers specialty forging, heat treatment and machining services, as well as commercial ingots. It utilizes several hardening methods that include differential, classical and dual frequency progressive induction, as well as quenching methods that include water, forced air and subzero cryogenic in liquid nitrogen for the reduction of retained austenite. The company also utilizes forging methods that develop homogeneous, fine-grained metallurgical structures for imparting strength and ductility in the forging cross-section.

American Tower Corporation, based in Pittsburgh, is a leading global provider of wireless communications infrastructure. Specializing in next-generation wireless technologies, American Tower offers innovative solutions to meet the evolving needs of the telecommunications industry. Generated from their website's infomation

L.B. Foster Company, a more than 100-year-old American corporation, is a manufacturer, fabricator and distributor of products for the transportation, construction, utility and energy markets. The corporation owns divisions and subsidiaries that supply products to industries requiring rail and rail accessories, sheet, pipe and H piling, bridge decking and highway products, earth retention systems, soundwalls, precast concrete buildings, and threaded and coated pipe. L.B. Foster markets its products worldwide. The company is committed to meeting customer requirements and increasing customer satisfaction through continual improvement of its products, services and the quality management system. L.B. Foster Company is located in Pittsburgh.