Which bead pattern is recommended for fill passes on a 2G Vee groove weld on 10 mm material?

Study for the Gas Metal Arc Welding Exam, including GMAW, FCAW, and MCAW methods. Use flashcards and multiple choice questions with hints and explanations for effective learning. Get ready for your welding certification!

In thick groove welds, the goal of fill passes is to distribute heat evenly and build the weld metal uniformly from root to cap. Using a circular bead pattern for all fill passes in a 2G horizontal groove on a 10 mm plate achieves that balance. The circular motion centers heat around the weld axis, promoting even fusion to both groove sides and a consistent throat thickness. In the horizontal position, the pool tends to flow with gravity; a circular pattern helps keep the molten metal from favoring one side, reducing sag and the risk of burn-through or undercut at the toes. This approach also tends to produce a more uniform bead profile and coverage across the groove walls as you progress from root to fill, which is especially important on thicker material. Straight stringer passes can bias heat and edge buildup, while broad weave patterns may cause excessive heat input or irregular fill. The circular approach provides controlled, symmetrical deposition across all fill passes, aligning with the needs of a thick 2G V-groove weld.