 The facility became operational in July 2010.The company put both its carbon mill in Calvert and a steel slab-making unit in Rio de Janeiro up for sale in May 2012, citing rising production costs and a worldwide decrease in demand.ThyssenKrupp's stainless steel division, Inoxum, including the stainless portion of the Calvert plant, was sold to Finnish stainless steel company Outokumpu Oyi in 2012.