Thickness, min Process in. mm GTAW1/8 3SMAW 3/16 5GMAW1/4 6FCAW-S1/4 6FCAW-G3/8 10SAW3/8 10Submerged arc welding (SAW)gas metal arc welding (GMAW)fux cored arc welding (FCAW)gas tungsten arc welding (GTAW)Shielded Metal Arc Welding(SMAW )Alternativel! when it is im"ractical to "ostweld heat treat (#W$T)