When welding vertically, the lead angle should be in which direction?

When welding vertically, it is important to consider the lead angle, which refers to the angle of the electrode in relation to the direction of travel. The correct practice is to have the lead angle point opposite the direction of travel. This technique helps maintain control over the molten weld pool and prevents it from sagging or running uncontrollably down the vertical surface.

By directing the lead angle opposite to the movement of the welder, you allow gravity to work with you, keeping the weld metal in position and promoting better fusion and penetration into the base materials. This method enhances the overall quality of the weld, ensuring that it adheres properly to both the workpieces and reduces the risk of defects.

In contrast, leading in the direction of travel could result in a loss of control over the weld pool, causing it to flow away from the intended weld joint. Perpendicular positioning might not offer the best penetration or control for vertical welding, while stating that it does not matter undermines the necessity of proper technique for achieving sound welds in challenging positions.