4.0mm ESAB 61.80 Stainless Steel Electrodes in Vacpac E347-17 To clear - Esab OK 61.80 is an Acid-rutile, niobium-stabilised, stainless-steel, LMA electrode with low carbon content for welding stainless types 321 and 347. It is resistant to intergranular corrosion up to 400°C. Welding current DC+, AC OCV 50 V