For support with questions regarding filling in quotations, displaying orders and contracts, participating in auctions and other information related to purchasing and registration processes, contact: Usiminas Support – e-mail fornecedor@usiminas.com or telephone (31) 3499-9817 In case of technical problems in navigation, access, plan types and other information related to the SAP Ariba system, contact: Ariba Support Here you can also access the video and manual with the complete step by step for registering suppliers: Click here and watch the step-by-step video. Supplier Registration Manual – SAP Ariba