1/4" stainless steel.<br />-Accurately TIG welding stainless is relatively difficult. Here's what you can do to touch up an uneven bead. Try not to make a habit of it though, strive to get it right on the first pass.<br /><br />Although the red, purple, and dark blue colors are visually appealing when welding stainless, it means your weld is slightly too hot. Light gold/silver is ideal for the best corrosion resistance.