AWS A5.9 ER309LSi DUROARC 309LSi type solid TIG welding wire, DUROARC 309LSi is suitable for joining stainless chromium-nickel steels and dissimilar metals in a range of applications including overlays and other dissimilar ferrous metals and stainless steel to mild steel applications. The silicon contents will improves the wetting and washing behavior of the weld metal. Duralloy 309LSi has a good general corrosion resistance Precision layer winding technologies ensure smooth, trouble-free feeding. Shielding Gas: Argon