Abstract
An API 5L X-70 grade steel for large diameter pipeline application with sour gas resistance was developed by electric arc furnace processing, furnace ladle treatment, vacuum degassing, ladle treatment, and continuous casting, followed by three different controlled rolling schedules and air cooling or accelerated cooling. Mechanical properties equivalent to those of an API 5L X-70 grade steel were achieved in slabs with content ranges from 0.25 to 0.37 wt% C, 1.31 to 1.53 wt% Mn, 0.082 to 0.095 wt% Nb, and 0.008 to 0.015 wt% Ti. The slabs were processed by using a controlled rolled and accelerated cooling schedule.
Similar content being viewed by others
References
R. Mendoza, J. Camacho, G. Lugo, L. Herrera, J. Reyes, C. Gonzalez, and J.A. Juarez-Islas, Structure of Low Carbon Al-Killed/Ti-Added Steel, ISIJ International, Vol 37, 1997, p 176–180
K. Hulka, B. Bergmann, and A. Streibelberger, Development Trends in High Strength Structural Steels, Proc. of the International Conf. on Processing, Microstructure and Properties of Microalloyed and Other Modern High Strength Low Alloy Steels, A.J. DeArdo, Ed., The Iron and Steel Institute, 1991, p 177–187
K. Hulka, Rolling and Alloying as Influencing Factors on Pipe Steel Properties, Specialty Steels and Hard Materials, N.R. Comins and J.B. Clarck, Ed., Pergamon Press, 1983, p 267–276
T. Hashimoto and Y. Komizo, “Development of Low Pcm X70 Grade Line Pipe for Prevention of Cracking during Girth Welding, Welding in Energy-Related Project,” Welding Institute of Canada, Toronto, 1983, p 63–71
K. Hulka, F. Heisterkamp, and I. I. Frantov, An Economic Approach to Pipe Steels with High Toughness and Good Weldability, Pipeline Technology Conf. Proc., R. Denys, Ed., Antwerpen, Belgium, 1990, p 43–65
P.E. Repas, Metallurgical Fundamentals for HSLA Steels, Microalloyed HSLA Steels ’88, ASM International, 1988, p 3–14
G.R. Speich, J.L. Cuddy, C.R. Gordon, and A.J. DeArdo, Phase Transformations in Ferrous Alloys, The Metallurgical Society of AIME, Warrendale, PA, 1984, p 341–389
R.S. Hostetter, H. Kranenberg, and J. Bathelt, Fourth International Steel Rolling Conf. (Deauville, France), 1987, p B2.1-B2.10
J.G. Willians, C.R. Killmore, J.F. Barret, and A.K. Church, Processing, Microstructure, and Properties of HSLA Steels, Metallurgical Society of AIME, Warrendale, PA, 1988
A.C. Kneissl, C.I. Garcia, and A.J. DeArdo, Proc. of the International Conf. on Processing, Microstructure and Properties of Microalloyed and Other Modern High Strength Low Alloy Steels, A.J. DeArdo, Ed., Pittsburgh, PA, 1991, p 145–152
J.L. Verger-Gaugry, G. Ocampo, and J.D. Embury, Metallography, Vol 18, 1985, p 381
R. Kleemaier, M. Michelitsch, A. Kneissl, and F. Jeglitsch, Pract. Metallogr., Vol 26, 1989, p 248
K. Narita, Trans. Iron Steel Inst. Jpn., Vol 15, 1975, p 147
K.J. Irvine, F.B. Pickering, and T. Gladman, J. Iron Steel Inst., Vol 205, 1967, p 81–102
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Mendoza, R., Huante, J., Camacho, V. et al. Development of an API 5L X-70 grade steel for sour gas resistance pipeline application. J. of Materi Eng and Perform 8, 549–555 (1999). https://doi.org/10.1007/s11665-999-0008-4
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/s11665-999-0008-4