What Is Puddle Welding

The process relies on intense heat to melt both the top sheet and a portion of the substrate, creating a shared "puddle" of molten metal.

Common defects in puddle welding include: what is puddle welding

| Limitation | Description | |------------|-------------| | | Base metal should be at least 1/3 the diameter of the stud (typically ≥ 4.8 mm or 3/16 inch) to avoid burn-through. | | Material Type | Best on low-carbon steel. Difficult on galvanized, coated, or high-carbon steels without surface preparation. | | Equipment Cost | Stud welding guns and power supplies (especially drawn arc) are more expensive than standard stick welders. | | Inspection Difficulty | Weld quality cannot be visually assessed from the underside. Requires bend testing, ring testing, or ultrasonic inspection. | | Position Limitation | Typically performed in flat or horizontal positions. Overhead puddle welding is possible but difficult. | The process relies on intense heat to melt