What kind of power source is used for Gas tungsten arc welding?

Gas tungsten arc welding (GTAW), also known as TIG welding, typically uses a constant current power source. This can be either alternating current (AC) or direct current (DC), depending on the materials being welded. AC is often used for aluminum and magnesium, while DC is commonly employed for ferrous and non-ferrous metals. The power source provides a stable arc, which is essential for achieving high-quality welds.