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A steel spool holding thirty-three pounds of copper-coated mild steel MIG wire

ESAB 321M116700 70S-6 .045 33 lb Welding Wire

SKU CH-J2G4-8C7B7

Mild-steel MIG welding wire, ER70S-6 classification, .045 in diameter on a 33 lb steel spool

  • TypeWelding Supplies
  • Mild steel wire for reliable MIG welds
  • .045 in diameter suits standard feeders
  • 33 lb spool supports extended runs
  • ER70S-6 class meets AWS tensile specs
  • 75 ksi tensile strength with 100% CO2 shielding

ESAB 70S-6 MIG Welding Wire

This ESAB 70S-6 welding wire is a carbon steel consumable for MIG (GMAW) processes. It comes on a 33 lb steel spool with a .045 in wire diameter. The wire is suited for general fabrication and repair work on mild steel. Welders needing a different diameter or material type should select an alternative product.

Verify Wire Diameter and Shielding Gas

Confirm that your MIG gun and drive rolls accept .045 in wire before ordering. The tensile and yield strengths differ between shielding gases: 75 ksi tensile with 100 percent carbon dioxide versus 84 ksi with 75 percent argon/25 percent carbon dioxide. Yield strength is 61 ksi with carbon dioxide and 70 ksi with the argon mix. Ensure your gas supply matches the mechanical properties required for the job.

Mechanical Properties Under Sustained Use

The wire delivers consistent tensile strength of 75 ksi when run with 100 percent carbon dioxide and 84 ksi with the argon blend during continuous welding. Minimum yield strength is rated at 58 ksi, with as-welded yield reaching 61 ksi or 70 ksi depending on the shielding gas used. These figures reflect performance maintained across the spool rather than short test samples.

Highlights

  • Mild steel wire for reliable MIG welds
  • .045 in diameter suits standard feeders
  • 33 lb spool supports extended runs
  • ER70S-6 class meets AWS tensile specs
  • 75 ksi tensile strength with 100% CO2 shielding

Specifications

BrandESAB
TypeWelding Supplies

Questions about this item

What is included with the ESAB 321M116700 70S-6 .045 33 lb spool and what must be purchased separately?

The package contains a 33 lb steel spool of ER70S-6 mild steel MIG wire at .045 in diameter. You will need a compatible MIG welder, shielding gas such as 100% CO₂ or 75/25 Ar/CO₂, contact tips and a liner suited to .045 in wire.

Should I choose the .045 in diameter or a different wire size for my application?

This spool is only offered in .045 in diameter. Choose it when your welder and contact tips are set up for .045 in wire and the joint thickness matches the typical range for that size.

What do the 75 ksi and 84 ksi tensile figures mean for actual welds?

The as-welded tensile strength is 75 ksi with 100% CO₂ shielding and 84 ksi with 75/25 Ar/CO₂. Yield strength reaches 61 ksi and 70 ksi respectively, so select your gas mix based on the strength the joint requires.

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