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All Journal KOLECER: Scientific Journal of Mechanical Engineering
Muhammad Alfiyan Rifqi Maulana
Universitas Hasyim Asy'ari Tebuireng Jombang
Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Effect of TIG welding current variation on the tensile strength of stainless steel 304 welded joints Dian Anisa Rokhmah Wati; Muhammad Alfiyan Rifqi Maulana; Toto Supriyono; Muhammad Fahrur Rozi
KOLECER Scientific Journal of Mechanical Engineering Vol. 2 No. 1 (2026): March 2026
Publisher : Program Studi Teknik Mesin Fakultas Teknik Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/ksjme.v2i1.44002

Abstract

This study investigates the effect of TIG welding current variation on the tensile strength characteristics of stainless steel 304 welded joints. The research is motivated by the need to optimise welding parameters to ensure reliable mechanical performance and minimise variability in welded structures used in industrial applications. Inadequate control of welding current may lead to unstable heat input, affecting weld penetration, microstructural homogeneity, and joint strength. Therefore, this study aims to evaluate the influence of welding current on tensile performance through an experimental and statistical approach. Welding was conducted at two current levels, 115 A and 125 A, followed by tensile testing in accordance with ASTM E8 standards. Statistical analyses, including descriptive statistics and one-way ANOVA, were applied to assess the significance of current variation. The results indicate that the average tensile strength increased from 28.33 MPa at 115 A to 42.87 MPa at 125 A, with reduced data variability at higher current. ANOVA confirmed a significant effect of welding current (p < 0.05). These findings suggest that higher heat input within an optimal range improves weld integrity and mechanical consistency. The study concludes that appropriate current selection enhances joint reliability, offering practical implications for welding parameter optimisation and future research on microstructural and process parameter interactions
Co-Authors Dian Anisa Rokhmah Wati Muhammad Fahrur Rozi Toto Supriyono