62071200 - Bonarc ER308LSi .045" Stainless MIG Wire - 12kg Spool

Smooth Feeding for Professional Stainless Welds

Take the headache out of stainless steel welding with the Bonarc ER308LSi .045" MIG Wire. If you have ever struggled with a sluggish weld puddle that just won't flow out to the edges, this "HiSil" (High Silicon) wire is the upgrade you need. The extra silicon in the formula acts like a wetting agent, making the molten metal more fluid. This means the puddle flows naturally into the joint, creating those smooth, flat beads that look like a stack of dimes, often with little to no manipulation required. It is the perfect solution for welders who take pride in the visual appearance of their work, whether it's on a custom exhaust system, a food-grade tank, or architectural metalwork.

This wire is a 308L grade, meaning it is the industry standard for welding the most common stainless steel: 304. The "L" stands for Low Carbon, which is your insurance policy against corrosion. It keeps the stainless properties intact even after the high heat of welding, so your project won't rust out at the seams later. The .045" thickness is a workhorse size, great for welding thicker plates or structural frames where you need to lay down metal fast without sacrificing control. It runs on standard DCEP polarity, just like your regular mild steel MIG wire, but remember to swap your gas to a stainless mix (like 98/2 Argon/CO2) for the best results.

Setup Tips for Success

To get the most out of this 12kg spool, make sure your machine is set up for stainless. We highly recommend using a Teflon or plastic liner in your MIG gun instead of the standard steel liner used for mild steel. Steel liners can shave off tiny particles that contaminate the stainless wire, leading to rust spots later. Also, ensure your drive rolls are V-groove (for solid wire) and set to the correct tension—stainless wire is harder than mild steel but can still be deformed if crushed. Keep a dedicated stainless steel wire brush handy for cleaning your base metal before you start an arc. With the Bonarc ER308LSi, you'll notice less spatter sticking to your nozzle and your workpiece, meaning less time grinding and more time welding.