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Metal Science and Metal Physics
ArticleName Perspective high-strength pipe steel with increased corrosion cold resistance
DOI 10.17580/cisisr.2023.02.12
ArticleAuthor P. P. Poletskov, N. V. Koptseva, A. S. Kuznetsova, D. Yu. Alekseev

Nosov Magnitogorsk State Technical University (Magnitogorsk, Russia)

P. P. Poletskov, Dr. Eng., Prof., Dept. of Material Processing Technology
N. V. Koptseva, Dr. Eng., Prof., Dept. of Foundry Production and Materials Science
A. S. Kuznetsova, Cand. Eng., Senior Researcher, Dept. of Material Processing Technologies
D. Yu. Alekseev, Engineer, Dept. of Material Processing Technologies, e-mail:


The scientists of Nosov Magnitogorsk State Technical University developed the new steel with 0.08C-1.50Mn-1.20Cr-0.06Nb-0.04Ti alloying system. Phase transformations of undercooled austenite were examined via dilatometric analysis using Gleeble 3500 complex. Metallographic analysis of the structure, which is forming during continuous cooling, is carried out. Thermokinetic and structural diagrams of steel were built. The conditions of controlled rolling and accelerated cooling of the developed steel are suggested; they provide increased strength (σт=520-560 N/mm2, σв=600-673 N/mm2; δ5=26-23.5 %; HBW 207-229), cold resistance down to -70 °С (KCV-70 = 252-245 J/cm2; KCU-60 = 330-295 J/cm2), as well as increased corrosion resistance in carbon dioxide and hydrogen sulfide environments (HIC, SSC). Providing of such favourable combination of properties makes it possible to use the new steel for manufacture of pipes of different strength classes in oil and gas industry, for operation in the Far North regions.

The research was carried out under financial support of RF Ministry of Education and Science within the framework of realization of the complex project for development of high-tech production, which was conducted with participation of the higher education institution (Agreement No. 075-11-2021-063 dated 25.06.2021).

keywords High-strength pipe steels, C-Mn-Cr-Nb-Ti alloying system, continuous cooling, phase transformations, structure, thermokinetic diagram, controlled rolling and accelerated cooling, mechanical properties, cold resistance, corrosion resistance

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Full content Perspective high-strength pipe steel with increased corrosion cold resistance