Mig Welding Wire ER70S-6.035in 33 lb Spool - Low Splatter, Smooth Bead

In this review of the ER70S-6 MIG welding wire the bottom line is clear: this spool is best for fabricators and shops that need a reliable, copper-coated mild steel wire that runs cleanly and produces smooth beads with minimal cleanup. The reviewer found the 33 lb spool to be a practical choice for medium-volume work, and the wire's higher manganese and silicon content helps with gap filling and improved bead appearance. It is recommended for those using 100% CO2 or CO2/argon mixes who value low spatter and consistent feed.

Key Features

• ER70S-6 chemistry: Offers higher levels of manganese and silicon than standard grades, which helps with gap bridging and deposit quality during single or multi-pass welds.
• .035in diameter: A versatile size that balances penetration and deposition rate for common shop and field tasks without frequent wire changes.
• 33 lb spool: Provides a substantial supply for continuous work, reducing downtime from frequent spool swaps on medium-volume jobs.
• Copper-coated mild steel: Ensures consistent feeding through MIG guns and reduces oxidation before welding for reliable performance.
• Low splatter: Produces a smoother weld bead with little to zero post-weld cleanup when used with recommended shielding gases.
• Works with CO2 or CO2/argon mixes: Compatible shielding gas options let users tune arc characteristics for different fit-up and material conditions.

Who It's For

The ER70S-6.035in spool is aimed at construction welders, farm implement fabricators, truck body repair shops, and general purpose shops that frequently encounter poor fit-up, slightly rusty or oily plates. Its chemistry and wire size make it useful where a forgiving arc and good gap filling are needed.

It is less well suited for users requiring stainless or flux-cored welding consumables, or those who only do very light hobby work and would prefer a smaller spool to avoid long-term storage. Also, if precise low-heat input on thin sheet is the priority, alternative specialty wires may be a better match.

Pros & Cons

Pros

• Good value for money with a large 33 lb spool that reduces changeovers during projects.
• Wire quality yields low spatter and a smoother bead, lowering clean-up time after welding.
• Compatible with common shielding gases, letting users tune arc performance with CO2 or CO2/argon mixes.

Cons

• Ease of use received mixed comments from customers, so newcomers may need to tune machine settings for optimal feed and bead appearance.

Specifications

Grade	ER70S-6 (conforms to AWS A5.18)
Weight	33 lb (15 kg) spool
Diameter	.035in (0.9 mm)
Material	Copper-coated mild steel
Recommended shielding gas	100% CO2 or CO2/argon mix
Typical applications	Construction, farm implements, shaft buildup, tanks, truck bodies, general shop work

Our Verdict

The ER70S-6.035in 33 lb spool is a practical, cost-effective choice for welders who need a dependable mild steel MIG wire that minimizes spatter and produces consistent beads. It delivers strong value for medium-volume shops and field work, though users should expect to spend a little time dialing in feed and gas settings for the best performance.

Frequently Asked Questions

Can this wire be used with flux-cored settings?
No. This is a solid ER70S-6 copper-coated MIG wire intended for use with shielding gas such as 100% CO2 or CO2/argon mixes, not for flux-cored no-gas setups.

Is.035in suitable for thick plate welding?
.035in is versatile for moderate thicknesses and multi-pass welds; for very thick plate or heavy structural sections, larger diameter wires or different welding procedures may be preferable.

Will rusty or oily steel cause problems?
The wire is more forgiving than some grades and can handle poor fit-up and mildly rusty or oily plates, but best practice is to clean heavily contaminated surfaces before welding.