Mechanical Properties Restoration of API 5L X60 Carbon Steel through Hot Induction Bending Followed by Quenching and Tempering Treatment

  • Dois Dita Wahyu Kirana Program Studi Teknik Mesin, Fakultas Teknik, Universitas Riau Kepulauan, Batam, 29422, Indonesia
  • Fardin Hasibuan 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
  • Muhammad Fahrell Adlinizar Technical Engineer, PT Cladtek Bi-Metal Manufacturing Batu Ampar, Batam, 29452, Indonesia
DOI: http://dx.doi.org/10.36842/jomase.v69i2.536

Abstract

Pipe bending is a critical process in the oil and gas industry to accommodate complex terrain while maintaining pipeline integrity. This study investigates the mechanical and micro structural responses of API 5L X60 seamless carbon steel pipes subjected to hot induction bending followed by quenching and tempering. Tensile testing, hardness measurements, and optical microscopy were employed to characterize the changes induced by these treatments. Post-treatment results demonstrated an increase in ultimate tensile strength from 580 N/mm² to 606 N/mm² (4.4%) and yield strength from 455 N/mm² to 495 N/mm² (8.7%), accompanied by a reduction in elongation from 27% to 23% and a slight decrease in hardness from 206 HV to 199 HV. Micro structural observations revealed finer grains (ASTM grain size 9.5) and the presence of tempered martensite, contributing to improved strength and toughness. The enhancements are attributed to strain hardening, phase transformation, and stress relief during tempering. These findings suggest that integrating hot bending with appropriate heat treatment effectively optimizes pipe performance for demanding service conditions.

##Keywords:## API 5L X60, Hot induction bending, Quenching, Tempering, Mechanical properties.
Published
Jul 30, 2025
How to Cite
KIRANA, Dois Dita Wahyu et al. Mechanical Properties Restoration of API 5L X60 Carbon Steel through Hot Induction Bending Followed by Quenching and Tempering Treatment. Journal of Ocean, Mechanical and Aerospace -science and engineering-, [S.l.], v. 69, n. 2, p. 155-162, july 2025. ISSN 2527-6085. Available at: <https://isomase.org/Journals/index.php/jomase/article/view/536>. Date accessed: 24 may 2026. doi: http://dx.doi.org/10.36842/jomase.v69i2.536.
Citation Formats
Issue
Vol 69 No 2 (2025): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Section
Articles

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