<![CDATA[In the manufacturing and construction industries, welding is the most common method of joining metals. This study aims to optimize SMAW parameters (welding current and travel speed) for joining dissimilar materials—SA-36 and SA-240 Gr.304—in fillet welds. Steel and stainless steel plates were welded using the SMAW process with DCEP polarity. The joints were made using a 90° fillet weld. Welding currents of 100 A and 110 A were used, with E-309 SFA-5.4 welding wire of 3.2 mm diameter. Macroscopic testing was performed on the cross-section of the specimens. Hardness testing was conducted using a Vickers hardness tester on the base metal, Heat Affected Zone (HAZ), and the weld zone. Specimen N4 exhibited the highest penetration at 110 A and a travel speed of 2 mm/s. Specimen N1 had the smallest HAZ width at 100 A and a travel speed of 2.4 mm/s. The visual parameters of specimen N2 were generally optimal as they minimized welding defects. It was concluded that specimen N2 was the most optimal for macro and hardness tests, with a 110 A setting and a high travel speed.]]>
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