During a job welding thin-gauge sheet metal (3 mm thickness) in the flat position (1G) using SMAW, a welder notices excessive burn-through and an overly fluid weld puddle. Which adjustment is most likely needed?

Question: During a job welding thin-gauge sheet metal (3 mm thickness) in the flat position (1G) using SMAW, a welder notices excessive burn-through and an overly fluid weld puddle. Which adjustment is most likely needed?

Answer options: ✅ Decrease the amperage and consider switching to a smaller diameter electrode if possible.

• Increase the amperage to speed up the welding process.
• Switch to Direct Current Electrode Negative (DCEN) if currently using DCEP.
• Increase the travel speed significantly to pass over the material faster.

Correct answer: Decrease the amperage and consider switching to a smaller diameter electrode if possible.

Explanation: Excessive burn-through and an overly fluid weld puddle on thin material indicate too much heat input. Decreasing the amperage will reduce the heat input, allowing for better control of the weld puddle and reducing the risk of burn-through. A smaller electrode diameter also delivers less heat per unit of time. Increasing amperage or travel speed alone might exacerbate the issue or lead to other defects.