The designation "3F" follows the American Welding Society (AWS) classification system: : Refers to the Vertical position.
In 3F Up, keep a slight "push" or neutral angle (5-10 degrees) to help the arc force support the puddle.
Journal of Cultural Analysis and Social Changehttps://jcasc.com welding 3f
: Caused by moving too fast or not pausing at the edges, leaving a "ditch" along the side of the weld.
Removing too much base metal at the edges without filling it back in. The designation "3F" follows the American Welding Society
: Maintain a 10 to 15-degree "push" or "drag" angle (pointing slightly upward) to help the arc force hold the puddle in place.
You move faster than the molten puddle to prevent the slag from running ahead of the arc. Removing too much base metal at the edges
While flat (1F) or horizontal (2F) welds allow the molten metal to sit comfortably in the joint, 3F forces the welder to manage a puddle that wants to sag or run. Vertical Up vs. Vertical Down
In vertical down welding, the slag can get trapped underneath the weld bead if the welder isn't moving fast enough. Training and Certification
___________________