69100508 - Bonarc ER70S-6 Mild Steel MIG Wire .030 - 5kg Spool

Reliable Welding Wire for Every Project

If you are looking for a MIG wire that just works, the Bonarc .030" S6 Steel Wire is a fantastic choice for your garage, workshop, or job site. This 5kg (approx. 11lb) spool is the perfect size for many portable MIG welders and offers enough material to get through substantial projects without the weight of a massive industrial drum. Whether you are patching up a car frame, building a welding table, or repairing farm equipment, this wire is designed to make your life easier. The .030" diameter is widely considered the "sweet spot" for general fabrication—it is thin enough to handle sheet metal on auto body repairs without blowing through, yet thick enough to lay down solid beads on 1/4" steel brackets and tubing.

The "S6" in the name stands for the wire's chemistry, which is loaded with extra silicon and manganese. In plain English, this means the wire helps clean the metal as you weld. If you don't have time to grind every single inch of steel down to shiny bare metal, this wire is forgiving enough to handle a bit of rust or mill scale while still producing a strong, crack-resistant weld. It flows out smoothly, wetting into the toes of the weld to create a flat, professional-looking bead that requires less grinding later. The copper coating on the wire isn't just for looks; it helps the wire slide smoothly through your MIG gun liner, preventing those frustrating jams and burn-backs that stop your work cold.

Setting up is straightforward. You can run this wire with straight CO2 if you are on a budget or need maximum penetration on thicker steel. However, for the best experience—smoother sound, less spatter, and nicer looking welds—we recommend running it with a 75/25 Argon/CO2 mix. It runs on standard DC+ polarity, which is the default for almost all gas-shielded MIG welding. The arc is crisp and consistent, giving you excellent control over the puddle whether you are welding flat on a bench or out of position on a vertical repair.

Don't settle for cheap, unbranded wire that sputters and pops. Bonarc delivers consistent quality spool after spool. The precision winding ensures the wire comes off the spool tangle-free, so you can keep your hood down and your arc lit. Upgrade your consumables today and see the difference a quality ER70S-6 wire makes in your weld quality and overall frustration levels.