Recent Progress and Application of Bainite Steels for High Strength Linepipe up to X120
For the constant transmission of gas through a pipeline, steel weight decreases linearly with an increase in the strength of the linepipe irrespective of pipe size and internal pressure. Thus, high-strength large-diameter linepipe up to X120 has been developed and is now being applied to reduce pipe costs, transportation costs and construction costs. To meet the excellent weldability and low production costs required for the linepipe application of bainite produced through using Thermo-Mechanical Control Processing (TMCP) from low carbon chemistry is essential. Dual phase steel made by means of the introduction of ferrite in the bainite matrix mitigates the inferior properties of bainite. Herein, the production parameters affecting the microstructure and the properties are overviewed.
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
H. Asahi et al., "Recent Progress and Application of Bainite Steels for High Strength Linepipe up to X120 ", Materials Science Forum, Vols. 638-642, pp. 3032-3037, 2010