What kind of current is typically used in SMAW?

In Shielded Metal Arc Welding (SMAW), both direct current (DC) and alternating current (AC) are commonly used, making the choice that includes both forms of current the correct one. This versatility allows welders to select the appropriate current type based on the specific requirements of the welding task, such as the type of electrode being used, the position of the weld, and the characteristics of the materials being welded.

Direct current can provide a more stable arc and is often preferred for welds where penetration and heat control are critical. In contrast, alternating current is advantageous for welding with certain types of electrodes and can help reduce issues like arc blow, which can occur in certain welding positions or with magnetic materials. Thus, the flexibility to use either current enhances the adaptability and effectiveness of SMAW in various welding applications.