Effect of Hot Induction Bending Followed by Controlled Heat Treatment on the Mechanical and Microstructural Behavior of API 5L X65 Carbon Steel Pipes

  • Fardin Hasibuan Program Studi Teknik Mesin, Fakultas Teknik, Universitas Riau Kepulauan, Batam, 29422, Indonesia
  • Yosua Luis Vigo Yosua Luis Vigo Sitompul Program Studi Teknik Mesin, Fakultas Teknik, Universitas Riau Kepulauan, Batam, 29422, Indonesia
  • Arif Rahman Hakim Program Studi Teknik Mesin, Fakultas Teknik, Universitas Riau Kepulauan, Batam, 29422, Indonesia
  • Joni Mart Sitio Operation Quality Manager, PT Cladtek Bi-Metal Manufacturing Batu Ampar, Batam, 29452, Indonesia
DOI: http://dx.doi.org/10.36842/jomase.v69i3.562

Abstract

This study examines the mechanical and microstructural behavior of API 5L X65QS/QO PSL2 seamless carbon steel pipes subjected to a hot induction bending process followed by quenching and tempering. The research aimed to evaluate the combined effect of mechanical deformation and heat treatment on the material’s strength, hardness, and toughness. Experimental procedures were performed on a 12-inch seamless pipe bent at 900 ± 15 °C, quenched in agitated water at 15 °C, and tempered at 660 ± 15 °C. Mechanical testing revealed that the Ultimate Tensile Strength (UTS) and Yield Strength (YS) increased by approximately 8.5%, while hardness decreased slightly from 215 HV to 210 HV. Elongation improved from 29% to 32%, indicating enhanced ductility. Microstructural analysis showed a fine ferrite–pearlite structure with an ASTM grain size number greater than 8, confirming effective grain refinement achieved through controlled heat treatment. Overall, the combined hot induction bending, quenching, and tempering processes successfully produced a fine-grained material with improved strength, ductility, and toughness, demonstrating its suitability for high-performance and high-pressure pipeline applications.

##Keywords:## API 5L X65, Hot induction bending, Quenching, Tempering, Mechanical properties.
Published
Dec 5, 2025
How to Cite
HASIBUAN, Fardin et al. Effect of Hot Induction Bending Followed by Controlled Heat Treatment on the Mechanical and Microstructural Behavior of API 5L X65 Carbon Steel Pipes. Journal of Ocean, Mechanical and Aerospace -science and engineering-, [S.l.], v. 69, n. 3, p. 270-278, dec. 2025. ISSN 2527-6085. Available at: <https://isomase.org/Journals/index.php/jomase/article/view/562>. Date accessed: 09 june 2026. doi: http://dx.doi.org/10.36842/jomase.v69i3.562.
Citation Formats
Issue
Vol 69 No 3 (2025): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Section
Articles

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