Welding 3f Jun 2026

Most structural codes and high-strength applications require welding. This technique involves building a "shelf" of solidified metal and stacking the molten puddle on top of it as you climb the joint. Pros : Deeper penetration and a stronger, denser weld bead.

The primary enemy of a 3F weld is . Without proper technique, the molten metal will sag, leading to a variety of defects: welding 3f

| Criteria | Result (Pass/Fail) | |----------|--------------------| | No visible cracks | ✔ Pass | | No undercut > 1/32" | ✔ Pass | | Uniform bead size (leg length ~6 mm) | ✔ Pass | | No slag inclusion | ✔ Pass | | Convexity < 1/8" | ✔ Pass | the molten metal will sag