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Create free account to monitor RYIryerson is a services company that processes and distributes metals, with operations in the united states, mexico, canada, china and brazil. founded in 1842, ryerson is headquartered in chicago and employs approximately 3,700 employees in more than 100 locations. by providing links to other sites, ryerson does not guarantee, approve or endorse the information or products available at these sites, nor does a link indicate any association with or endorsement by the linked site to ryerson.