4g Welding Position | Must Try |

The primary adversary in 4G welding is .

| Defect | Cause | Solution | | :--- | :--- | :--- | | | Travel speed too slow; amperage too high. | Increase travel speed; lower amperage; fill the toe of the weld as you move. | | Overlap (Roll-over) | Puddle too cold or too large; not enough penetration. | Increase voltage slightly; focus arc force on the center of the joint. | | Porosity (Wormholes) | Gas coverage is insufficient (MIG/FCAW). | Move the gun closer to the plate; check for wind drafts; increase gas flow. | | Spatter | Arc length too long; voltage too high for wire speed. | Tighten the arc; tune machine settings (stick-out should be 1/4" to 3/8"). | 4g welding position

Recommended for: Structural welders, pipefitters (for backing plates), ironworkers. Not recommended for: Automotive restoration, thin sheet metal, or anyone who values their forearm hair. The primary adversary in 4G welding is

The "4" in 4G stands for the , while the "G" signifies a groove weld (typically a butt joint between two plates). Unlike its counterpart, the 4F position (overhead fillet weld), 4G requires the welder to penetrate deep into the "V" or "U" shaped groove of a horizontal joint. | | Overlap (Roll-over) | Puddle too cold