The Effect of Heat Input on Welding Combination of GTAW and SMAW SA537 Material on Mechanical Properties and Microstructure

The combination of GTAW (Gas Tungsten Arc Welding) and SMAW (Shield Metal processes on SA537 Class 2 carbon steel using variations heat input is the main choice to get best quality welded joints. This research aims joint material process with determine results mechanical properties microstructure analysis. experimental method uses a single V butt design, groove angle 60o, root face mm gap 4 as many 7 passes, in 2.5 kJ/mm, 2.8 kJ/mm 3.2 kJ/mm. According ASME section IX, testing showed that specimen gave optimum highest tensile strength 480 MPa compared other two specimens, there were no cracks when tested for bending higher input, greater decrease percentage ferrite. Using this study provides weld result better than use