Which metals is thoriated tungsten primarily used to weld?

Thoriated tungsten is primarily used in welding applications requiring excellent arc stability and a high melting point, making it suitable for a wide range of metals. This includes carbon steel, stainless steel, titanium, aluminum, and nickel. The presence of thorium enhances the tungsten's performance by improving its electron emission and maintaining a stable arc, particularly beneficial when welding materials that require a high-quality weld or precise control over the heat input.

Thoriated tungsten electrodes are particularly favored in the Gas Tungsten Arc Welding (GTAW) process because they can withstand high temperatures and provide a consistent arc, which is essential for achieving strong welds in various metals. The versatility of thoriated tungsten makes it an excellent choice for more demanding welding tasks across different materials.

Consequently, while the other options might reference specific types of metals or limited categories, they do not encompass the broad range of application that thoriated tungsten electrodes are intended for, especially in the context of more complex and demanding welding scenarios.