A corrosion-resistant steel tube such as a sheath heater steel tube and boiler tube which exhibit improved resistance to dry corrosion under high temperature dry-corrosive conditions in the presence of chlorides is disclosed. The steel consists essentially of, in % by weight:...http://www.google.es/patents/US4742324?utm_source=gb-gplus-sharePatente US4742324 - Sheath heater
