What is the typical range of DC welding current for thin metals?

• A. 10 to 30 amps
• B. 30 to 70 amps
• C. 70 to 100 amps
• D. 100 to 150 amps

Answer: (B)

For welding thin metals, the typical range of direct current (DC) welding current is often between 30 to 70 amps. This range is optimal because it provides enough heat to create a strong weld without burning through the material, which is a common challenge when working with thinner sheets. The current needs to be carefully controlled to avoid warping the metal and to maintain a consistent weld pool.

Using a current within this range allows for adequate penetration while minimizing the risk of excessive heat that can damage the thin metal. It's a balance that ensures good weld integrity and helps achieve the desired results. This makes 30 to 70 amps the most suitable choice for this type of welding application, catering to the specific needs of welding thin metals effectively.