SC acquire shares in Sumitomo Metal Indutries and Vallourec & Sumitomo Seamless tube plant in Brazil ::. 31/01/2008 SC agreed with Petrobras Joint refining business in Nassei Sekiyu K.K. ::. 12/11/2007 SC forms strategic alliance with apex Silver Mines as for San Cristobal and Zinc mine in Bolivia ::. 26/09/2006