Which of the following electrodes can be used for TIG welding stainless steel?

When TIG welding stainless steel, various types of tungsten electrodes are suitable, each with distinct characteristics conducive to producing high-quality welds.

The 2% thoriated electrode, commonly identified by its red color, is known for its excellent arc stability and longevity, making it a popular choice for welding stainless steel due to its capability to perform well at higher amperages.

The blue 2% lanthanated electrode is another strong contender, celebrated for its capability to start the arc easily and maintain stability at both low and high currents. This electrode is especially beneficial for welding applications requiring versatility and a broad operating range.

The purple E3 electrode is designed to provide excellent performance across a variety of materials, including stainless steel. It offers a balance of good arc stability and longevity, and it is effective in minimizing the occurrence of tungsten inclusion in the weld.

Given that all three types of electrodes possess attributes that make them effective for TIG welding stainless steel, the correct answer encompasses all options, reflecting the flexibility and variety of electrodes that can be used for this specific welding process.