254 JOURNAL OF MINES, METALS & FUELS 1.0 Introduction Hot cracking may happen if the amount of ferrite in the weld is not under control. The issue is resolved when a deposition electrode is employed because a little quantity of ferrite is deposited in the weld metal. Although practically any metal can be joined using TIG (gas tungsten arc welding), it is frequently employed for nonferrous metals. Applications for carbon steel are limited by the availability of cheaper steel welding techniques like gas metal arc welding (MIG) and shielded metal arc welding (SMAW) (SMAW). Welds made with this method may be ductile, robust, and corrosion- resistant. AISI1040 steel with the following chemical composition was utilised in this project: C 0.370.44; Mn 0.60- 0.90; P 0.40 (max); S 0.50. (max). This material is used to create Optimization of Gas Metal Arc Welding Process Parameters on Structural Steel Plates by Taguchi Method Praveen Math 1 and B.S. Praveen Kumar 2 1 Assistant Professor, School of Mechanical Engineering, REVA University, Bangalore, Research Scholar, Dept of Mechanical Engg, Govt Engg college, Ramanagar. 2 Associate Professor, Govt. Enng. College, K.R. Pete Abstract Steel welding is one of the most contentious academic topics nowadays. Shielded metal gas welding techniques’ impact on the welding of AISI1040 steel have been qualitatively investigated (MIG and TIG). The experimental layout must be developed using the Taguchi approach. Arc voltage, arc current, welding speed, nozzle to work distance, and gas pressure have all been found to have an effect on weld quality. The backing plate’s thickness as well as the plate’s thickness both matter. A trial design based on an orthogonal array is used to create weldments. To determine how successfully the weldments were welded, a set of tests are performed on them. ANOVA is used to assess the suitability of the data. The computed result is used as a contribution from each parameter to obtain the optimum values for fault minimization. Weldments are examined using an angle beam test, and the outcomes are assessed using ultrasound testing (UT). The presence of faults in the tested specimens, such as LOP, LOF, Blowholes, and Cracks Keywords : Gas Metal Arc Welding (GMAW), Weld Dilution, Regression Analysis Print ISSN : 0022-2755 Journal of Mines, Metals and Fuels Contents available at: www.informaticsjournals.com/index.php/jmmf axles, shafts, lightly stressed gears, and other parts for agricultural, earthmoving, and material handling equipment. The key determinants of weld quality, which are closely correlated with the kind of welding and process conditions, are the mechanical characteristics of the weld metal and the heat affected zone (HAZ). Bead geometry variables like heat affected zone, bead width, bead height, penetration, and area of penetration are greatly influenced by welding process parameters like welding speed, welding current, shielding gas flow rate, voltage, arc travel speed, contact tip - work distance, type of shielding gas, and so on. These parameters also have a significant impact on mechanical properties like tensile strength and hardness. This technique uses ultrasonic testing to assess weld faults without actually hurting the welds. Ultrasonic flaw 70(10A): 254-259; 2022. DOI: 10.18311/jmmf/2022/32760