Does anyone have any experience with or advice for welding AISI 1009? It is a very old specification with .12 carbon, .27 manganese, .10 nickel, and .025 sulfur. I've been requested to weld it to itself, and to A36. I'm anticipating that using SMAW with E7018 will work, but I'm concerned about excessive porosity developing in such a low carbon material. The material is in service as part of a water works, and the welds need to be water tight.