WEL 309 is an austenitic stainless steel welding rod used for welding SUS309S, 13Cr steel and 18Cr steel. Also, as the alloy degree of chrome and nickel is high, the welded metals can obtain the austenitic system even if diluted by carbon steel or low steel alloy materials; therefore, it is suitable for a wide range of different kind of welding such as build-up welding of stainless crud, lining welding and selding of different materials of stainless steel building structures.