ANALYZING THE EFFECTS OF WATER, AIR, AND SALTWATER COOLANTS ON THE TENSILE STRENGTH & HARDNESS OF AISI 1045 STEEL WELDED WITH METAL INERT GAS

Authors

  • Muhammad Hariz Dedy Sayogi Department of Manufacture Engineering, Politeknik Batulicin, Indonesia https://orcid.org/0009-0001-6726-5519
  • Jefri Aldo Department of Mechanical Engineering, Politeknik Negeri Subang, Indonesia
  • Lia Agustina Department of Manufacture Engineering, Politeknik Batulicin, Indonesia
  • I Made Susanto Department of Manufacture Engineering, Politeknik Batulicin, Indonesia

Keywords:

Steel AISI 1045, MIG welding, Cooling media variation

Abstract

This study aims to analyze the effect of cooling media variations (air, water, and salt water) on the mechanical properties of AISI 1045 medium carbon steel welded using the Metal Inert Gas (MIG) method. The experimental method was used with steel specimens in the form of plates which were then tested for tensile strength in accordance with the ASTM E8 standard and tested for hardness. The results of the study show that cooling with air produces the highest tensile strength (35.59 Kgf/mm²) due to the formation of ductile pearlite and ferrite microstructures. Cooling with water produced moderate tensile strength (34.42 Kgf/mm²), while cooling with salt water produced the lowest tensile strength (22.34 Kgf/mm²) due to the formation of hard but brittle martensite. Conversely, the highest hardness value was obtained with saltwater cooling (386.20 HV in the HAZ), followed by water, and the lowest with air. In general, slow cooling increases ductility and tensile strength, while rapid cooling increases hardness but decreases ductility. These findings emphasize the importance of selecting the appropriate cooling medium according to application requirements, whether the emphasis is on tensile strength or material hardness.

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Published

2026-04-30

How to Cite

Hariz Dedy Sayogi, M., Aldo, J., Agustina, L., & Made Susanto, I. (2026). ANALYZING THE EFFECTS OF WATER, AIR, AND SALTWATER COOLANTS ON THE TENSILE STRENGTH & HARDNESS OF AISI 1045 STEEL WELDED WITH METAL INERT GAS. Jurnal Dinamika Vokasional Teknik Mesin, 11(1). Retrieved from https://journal.uny.ac.id/index.php/dynamika/article/view/96353

Issue

Vol. 11 No. 1 (2026)

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Articles

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