ANALISIS PROSES PENGELASAN REPLATING LAMBUNG KAPAL PADA KONDISI FLOATING TERHADAP NILAI KEKERASANNYA

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Authors

  • Andri Djumiati Program Studi Teknik Bangunan Kapal, Politeknik Perkapalan Negeri Surabaya
  • Mochammad Karim Al Amin Program Studi Teknik Bangunan Kapal, Politeknik Perkapalan Negeri Surabaya
  • Egi Yuliora Program Studi Teknik Perkapalan, Politeknik Negeri Bengkalis
  • Nurul Atik Hamida Program Studi Teknik Bangunan Kapal, Politeknik Perkapalan Negeri Surabaya
  • Puspita Khumairoh Program Studi Teknik Bangunan Kapal, Politeknik Perkapalan Negeri Surabaya
  • Deby Ardianti Program Studi Teknik Bangunan Kapal, Politeknik Perkapalan Negeri Surabaya
  • Sabila Fitri Afsari Program Studi Teknik Perkapalan, Universitas Pembangunan Nasional Veteran Jakarta

DOI:

https://doi.org/10.30871/jatra.v7i2.10850

Keywords:

Floating, Hardness, Replating, Cooling Rate

Abstract

Replating the ship’s hull is an essential repair process to ensure that a vessel remains operationally seaworthy. Replating welding can be performed under both docking and floating conditions. These differing conditions influence the cooling rate, which in turn can result in variations in hardness (HV). This study examines the effect of varying the distance from the waterline (30, 60, 100, and 130 mm) and water temperature (25°C, 28°C, 30°C, and 32°C) on the hardness values produced during welding under floating conditions.
Each variation combination was tested using the Vickers method with three repetitions, and the reported HV values represent the average of those measurements. The results show that the highest hardness value under floating conditions reached 218.5 HV (30 mm, 25°C), while the lowest was 195.7 HV (130 mm, 32°C). All measured hardness values remained within the acceptable limits specified by BKI for low-carbon steel.
This study demonstrates that the closer the weld groove is to the water surface and the lower the water temperature, the higher the resulting hardness due to increased cooling rates. The limitations of this study include the absence of microstructural data and the unavailability of individual measurement data for further statistical analysis.

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Published

2025-12-30

How to Cite

Djumiati, A., Mochammad Karim Al Amin, Egi Yuliora, Nurul Atik Hamida, Puspita Khumairoh, Deby Ardianti, & Sabila Fitri Afsari. (2025). ANALISIS PROSES PENGELASAN REPLATING LAMBUNG KAPAL PADA KONDISI FLOATING TERHADAP NILAI KEKERASANNYA: -. Jurnal Teknologi Dan Riset Terapan (JATRA), 7(2), 1–8. https://doi.org/10.30871/jatra.v7i2.10850

Issue

Vol. 7 No. 2 (2025): Jurnal Teknologi dan Riset Terapan (JATRA) - December 2025

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Research Articles

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