Which of the following is true about the use of thoriated tungsten?

Thoriated tungsten electrodes are known for their excellent performance, especially in direct current electrode negative (DCEN) welding applications. They are often favored in the gas tungsten arc welding (GTAW) process when working with a variety of metals, including steel and stainless steel. The addition of thorium enhances the electrode’s ability to maintain a stable arc at higher temperatures, which is beneficial for achieving deep penetration and a strong weld.

In contrast, while aluminum welding typically requires an AC setup, thoriated tungsten is not primarily associated with aluminum welding. Other electrode types, such as pure tungsten or zirconated tungsten, are more commonly used for that purpose. Additionally, thoriated tungsten can indeed handle high-amperage applications, contrary to the option suggesting limitations in this area.

Using thoriated tungsten effectively requires an understanding of its properties and ideal applications, making it a versatile choice for experienced welders working with various metals in DCEN configurations.