Analisis Kekuatan Hasil Pengelasan Argon pada Stainless Steel 321 Dengan Menggunakan Variasi Arus 50 A, 75 A dan 100 A

Abstract

Argon welding (Gas Tungsten Arc Welding/GTAW) is one of the commonly used methods for joining metals due to its ability to produce smooth, clean welds with good mechanical properties. This research aims to analyze the tensile strength of argon welding on stainless steel 321 using current variations of 50 A, 75 A, and 100 A. The welding process was carried out under controlled parameters, and the welded joints were tested through tensile testing as well as visual inspection of weld quality. The results indicate that the variation of welding current significantly affects the tensile strength of the material. At 50 A, the weld joints tended to be less optimal due to shallow penetration. At 75 A, the highest tensile strength was achieved, with relatively homogeneous joints and minimal defects. Meanwhile, at 100 A, a decrease in strength occurred, possibly due to porosity and excessive thermal distortion. It can be concluded that a current of 75 A is the most effective parameter for producing strong argon weld joints on stainless steel 321. This study is expected to serve as a reference in determining the optimal parameters for similar metal welding processes to improve the quality and durability of welds