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69102008 - Bonarc ER70S-6 .030 Solid MIG Wire - 20kg Spool

Packaging: 20kg spool
$10.72/kg $134.00/20kg spool only $6.70/kgSave 37%

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OVERVIEW

Smooth Feeding .030" MIG Wire for Clean Welds

Upgrade your welding projects with the Bonarc ER70S-6 .030" Solid MIG Wire, a favorite among professional welders for its reliability and ease of use. This 20kg spool is perfect for fabrication shops and serious hobbyists who want to spend more time welding and less time swapping out smaller spools. The "S-6" classification means this wire is loaded with deoxidizers, which acts like a cleaning agent for your weld puddle. If you are welding on steel that isn't perfectly prepped—perhaps it has a bit of rust or mill scale—this wire helps float those impurities to the surface, leaving you with a solid, porosity-free weld.

Welders love the Bonarc brand for its consistency. The wire is precision wound, meaning it is layered perfectly on the spool. This eliminates the frustration of wire tangles and "bird-nesting" at the drive rolls, ensuring a steady, uninterrupted feed that lets you focus on your travel speed and gun angle. The .030-inch diameter is incredibly versatile; it is small enough to handle thin sheet metal on auto body repairs without blowing through, yet substantial enough to handle multi-pass structural welds on thicker frames and brackets.

Spatter control is another major benefit of this product. Nobody likes spending hours grinding off BBs after laying a bead. The Bonarc 70S-6 formulation is designed to minimize spatter, especially when used with a 75/25 Argon/CO2 gas mix. The result is a clean, professional-looking finish that requires minimal post-weld cleanup. Compatible with any standard MIG welder capable of holding a larger spool, this wire offers excellent arc stability and wetting, making it easier to achieve that "stack of dimes" look. Whether you are repairing farm equipment, building a custom trailer, or working on general fabrication, this wire delivers the performance you need.

Additional Information
Aws Spec:ER70S-6
Brand:Bonarc
Diameter:0.030"
Grade:S6 Copper Coated
Packaging:20 kg Spool
Packaging Description:20kg-spool
Polarity:DC
Weld Process:MIG (GMAW)
AWS Classification:ER70S-6
Wire Diameter:0.030"
Spool Weight:20kg (44lb)
Shielding Gas Requirement:100% CO2, 75% Argon / 25% CO2
Wire Type:Solid
Material Composition:Mild Steel
Current Type:DCEP (Direct Current Electrode Positive)

INCLUDED

  • 1 x 20kg Spool of Bonarc ER70S-6 .030" Solid MIG Wire

APPLICATIONS

  • Automotive body manufacturing and repair
  • General structural steel fabrication
  • Agricultural equipment repair and maintenance
  • Sheet metal fabrication
  • Pressure vessel and pipe welding
  • Construction of frames and supports
  • Robotic and automated welding systems

FAQ

For ER70S-6 wire, you can use 100% CO2 for deeper penetration and lower cost, or a mix of 75% Argon / 25% CO2 (C25) for a smoother arc and less spatter.

Yes, the ER70S-6 classification indicates high levels of silicon and manganese, which act as deoxidizers to help weld through moderate rust and mill scale.

This is a 20kg spool, which is approximately 44 lbs.

No, this is a solid wire that requires an external shielding gas.

The wire diameter is 0.030 inches (approximately 0.8mm).

Solid MIG wire like this should be welded using DCEP (Direct Current Electrode Positive), also known as Reverse Polarity.

This is a large 20kg (44lb) spool. Most small hobby welders only accept 2lb or 10lb spools. Check your machine's manual to see if it can support a 12-inch diameter spool.

Yes, this wire typically features a copper coating to improve electrical conductivity and prevent rusting during storage.