S527512-I26 - Hobart ER309LSi .045 Stainless Steel MIG Wire - 30lb Spool

Smoother Welds with Hobart 309LSi .045 MIG Wire

If you have ever struggled with the "ropey" or sluggish feel of standard stainless steel MIG welding, the Hobart 309LSi is the solution you need in your shop. This .045" wire is formulated with High Silicon (HiSil), which acts like a wetting agent for your weld puddle. Instead of piling up in the center, the molten metal flows out smoothly to the edges, giving you a flat, professional-looking bead with excellent tie-in. This means significantly less time spent grinding and polishing after the hood goes up, saving you labor and consumables on every job.

This wire is the go-to problem solver for "dissimilar" welding. Need to weld a mild steel bracket to a stainless steel tank? This is the wire to use. The 309LSi chemistry handles the dilution from the mild steel side without cracking, creating a strong, ductile bond. It is also perfect for putting down a barrier layer on mild steel before you cap it with 308L or 316L. The low carbon content protects your work from corrosion issues down the road, ensuring your welds hold up in harsh environments.

The 30lb spool size is ideal for production work, minimizing downtime for spool changes. The .045" diameter allows you to crank up the wire feed speed and amperage for welding on thicker plates and structural members. It runs smoothly on DCEP polarity with minimal spatter, keeping your nozzles clean and your arc stable. Whether you are repairing equipment in a pulp mill, fabricating custom food processing machinery, or working on general structural stainless projects, Hobart 309LSi gives you the control and quality you expect from a top-tier filler metal.