ArcelorMittal S.A.
Cold rolled steel wire, method and reinforcement of flexible conduits

Abstract:

A cold rolled steel wire having the following chemical composition expressed in percent by weight, 0.2.ltoreq.C %.ltoreq.0.6, 0.5.ltoreq.Mn %.ltoreq.1.0, 0.1.ltoreq.Si.ltoreq.0.5%, 0.2.ltoreq.Cr.ltoreq.1.0%, P.ltoreq.0.020%, S.ltoreq.0.015%, N.ltoreq.0.010%, and optionally not more than 0.07% Al, not more than 0.2% Ni, not more than 0.1% Mo and not more than 0.1% Cu, the balance being iron and the unavoidable impurities due to processing. This wire has a microstructure including bainite and, optionally, up to 35% acicular ferrite and up to 15% pearlite. A fabrication method and flexible conduits for hydrocarbon extraction are also provided.