Influence of plastic deformation on the mechanical characteristics of L450M steel during manufacturing of large diameter welded straight seam pipes

Keywords

welded straight-seam pipes, low-alloyed pipeline steel, expansion of pipe, mechanical characteristics.

Cite as

Dmytrakh I. M., Syrotyuk A. M., Ovsyanykov V. V., and Leshchak R. L. Influence of plastic deformation on the mechanical characteristics of L450M steel during manufacturing of large diameter welded straight seam pipes. Physicochemical Mechanics of Materials. 2026. 62(3), 74-80

Abstract

It is established that plastic expansion of a pipe billet made by cold deformation of hot-rolled 12 mm thick L450M steel sheets causes the uniform mechanical characteristics along the pipe contour. This effect has a positive impact on the quality of straight-seam welded pipes, since due to the uniformity of the mechanical characteristics of the metal along the pipe contour, they will have increased operational characteristics. This, in turn, increases the level of safety and durability of the main gas and oil pipelines and heating networks during their operation.

References

1. V.A. Borisenko, Yu.P. Nikhaenko, and V.I. Krikun, “Corrosion fracture of gas pipelines,” Physicochemical Mechanics of Materials, Special issue No. 5, 296-299 (2006).
2. S. Polyakov, A. Klymenko, L. Nyrkova, and O. Malkova, “Electrochemical monitoring of main pipelines in corrosion-hazardous areas,” Fizyko-Khimichna Mekhanika Materialiv [in Ukrainian] in 2 Volumes. Special issue No. 7, Vol. 2, 761-766 (2008).
3. E.I. Kryzhanivskyi, O.S. Tarayevskyi, and S.Y. Tarayevskyi, “Influence of the environment and uneven gas consumption on the accident-free operation of the gas pipeline // Problems of corrosion and anti-corrosion protection of materials,”Fizyko-Khimichna Mekhanika Materialiv [in Ukrainian] in 2 Volumes. Special issue 7, Vol. 2, 791-796 (2008).
4. S.G. Polyakov, L.I. Nyrkova, S.L. Melnychuk, S.O. Osadchuk, and A.V. Klymenko, “Methodological approach to the study of stress-corrosion cracking of main pipelines,” in Problems of Resource and Safety of Operation of Structures, Buildings and Machines, Paton Institute of Electric Welding of the NAS of Ukraine, Kyiv (2009), pp. 388-392.
5. H.M. Nykyforchyn, S.G. Polyakov, V.A. Chervatyuk, I.V. Orynyak, Z.V. Slobodyan, and R.M. Dzhala, “Strength and durability of oil and gas pipelines and reservoirs,” Vol. 11 in: V.V. Panasyuk (editor), Fracture Mechanics and Strength of Materials [in Ukrainian], Spolom, Lviv (2009).
6. V.I. Makhnenko, and A.S. Mylenyn, “Probabilistic method of ranking defects of main gas pipelines for their repair without decommissioning,” Zbirnyk Naukovykh Prats Nationalnogo Korablebudivnogo Universytetu [in Russian], Is. 4 (427), 3-12 (2009).
7. O. Holovchenko, V. Grigorenko, and V. Protsiv, “Microstructures and mechanical properties of cold rolled pipes with increased small deformation,” Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu [in Ukrainian], Is. 3, 54-59 (2023). https://doi.org/10.33271/nvngu/2023-3/054
8. V.U. Grigorenko, and S.V. Pilipenko, “Variation in wall thickness of cold-rolled pipe”, Steel in Translation, 38, Is. 9, 775-776 (2008). https://doi.org/10.3103/S0967091208090209
9. http://huaye.us/pipe-end-expander.html
10. V.V. Protsiv, and V.U. Hryhorenko, “Features of the expansion process in the technology of production of large diameter pipes for main oil and gas pipelines,” Metal and Casting of Ukraine, 29, Is. 3, 87-93 (2021). https://doi.org/10.15407/steelcast2021.03.087
11. I.M. Dmytrakh, A.M. Syrotyuk, V.V. Ovsyanykov, and R.L. Leshchak, “The influence of technological expansion operation on mechanical characteristics and crack growth resistance of the metal of welded straight-seam pipes,” Mater. Sci., 61, Is. 2, 241-248 (2025). https://doi.org/10.1007/s11003-025-00985-w
12. I.M. Dmytrakh, A.M. Syrotyuk, V.V. Ovsyanykov, and R.L. Leshchak, “The influence of technological expansion level on mechanical characteristics of base metal of welded straight-seam pipes of L450M steel”, Fizyko-Khimichna Mekhanika Materialiv [in Ukrainian], 61, Is. 6, 65-69 (2025). https://doi.org/10.1007/s11003-026-01053-7
13. Metallic Materials. Tensile Testing. Part 1. Test Method at Room Temperature [in Ukrainian], State Standard of Ukraine EN 10002-1:2006. (EN 10002-1:2001, IDT).
14. Destructive Testing of Welded Joints of Metallic Materials. Impact Bending Test. Test Specimen Location, Notches on Specimens, Test Report, State Standard ISO 9016:2008. (ISO 9016:2001, IDT).
15. I.M. Dmytrakh, and V.V. Panasyuk, Influence of Corrosive Environments on Local Fracture of Metals at Stress Concentrators [in Ukrainian], Karpenko Physico-Mechanical Institute, Lviv (1999).
16. H. Nykyforchyn, “Degradation assessment and failure prevention of pipeline systemsIn-service degradation of pipeline steels,” in G. Bolzon, G. Gabetta, and H. Nykyforchyn (editors), Lecture Notes in Civil Engineering, 102, (2021), pp 15-29. https://doi.org/10.1007/978-3-030-58073-5_2
17. E.I. Kryzhanivs’kyi, and H.M. Nykyforchyn, “Specific features of hydrogen-induced corrosion degradation of steels of gas and oil pipelines and oil storage reservoirs,” Mater. Sci., 47, Is. 2, 127-136 (2011). https://doi.org/10.1007/s11003-011-9390-9
18. I.M. Dmytrakh, A.M. Syrotyuk, and R.L. Leshchak, “Special diagram for hydrogen effect evaluation on mechanical characterizations of pipeline steel,” J. Mater. Eng. Perfor., 33, Is. 7, 3441-3454 (2024). https://doi.org/10.1007/s11665-023-08215-7
19. V.V. Panasyuk, I.M. Dmytrakh, L. Toth, O.L. Bilyi, and A.M. Syrotyuk, “A method for the assessment of the serviceability and fracture hazard for structural elements with crack-like defects,” Mater. Sci., 49, Is. 5, 565-576 (2014). https://doi.org/10.1007/s11003-014-9650-6
20. I.M. Dmytrakh, A.B. Vainman, M.H. Stashchuk, and L. Tot, “Reliability and durability of structural elements for heat-and-power engineering equipment,” Vol. 7 in V.V. Panasyuk (editor), Fracture Mechanics and Strength of Materials [in Ukraihnian], Akademperiodika, Kyiv (2005).