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Hobart HB-28 .045" ER70S-6 Mild Steel MIG Wire - 45lb Spool

$7.04/lb $157.95/45lb spool only $3.51/lbSave 50%

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OVERVIEW

Smooth Feeding, Clean Welds

When you are welding on structural steel, farm implements, or heavy equipment, you need a wire that isn't afraid of a little dirt. The Hobart HB-28 is your go-to .045" MIG wire for getting the job done right, even when the metal isn't perfectly prepped. Thanks to its ER70S-6 classification, this wire is packed with extra deoxidizers that help float out impurities like rust and mill scale, leaving you with a solid, clean weld bead every time.

One of the first things you will notice with the HB-28 is how smooth the arc feels. It is designed to minimize spatter, which means less time chipping and grinding after you finish the pass. The copper coating on the wire isn't just for looks—it helps the wire slide smoothly through your gun liner and ensures good contact at the tip, preventing those frustrating burn-backs and feed stutters that ruin your rhythm.

This 45lb spool is built for the long haul, perfect for shop welders running standard industrial feeders. Whether you are using straight CO2 to keep costs down and penetration up, or running a 75/25 Argon mix for that stack-of-dimes look, the HB-28 adapts to your setup. It wets out beautifully, meaning the puddle flows out to the edges smoothly, reducing the chance of cold lap and making your tie-ins look professional.

Best Uses

This wire is a workhorse for automotive repair, tank fabrication, pipe welding, and general construction. If you need a reliable solid wire that offers great playability and forgiving characteristics, load up a spool of Hobart HB-28.

Additional Information
Brand:Hobart
AWS Spec:ER70S-6
Diameter:0.045"
Grade:S6 Copper Coated
Packaging:45 lb Spool
Packaging Description:45lb-spool
Polarity:DC
Weld Process:MIG (GMAW)
Material Composition:Mild Steel
Wire Finish:Copper-coated
Shielding Gas Requirement:100% CO2, 75% Argon / 25% CO2
Spool Size:45 lb
AWS Classification:ER70S-6
Welding Position:All Positions

INCLUDED

  • 1x 45lb Spool of Hobart HB-28 ER70S-6 MIG Welding Wire (0.045")

APPLICATIONS

  • General Fabrication
  • Structural Steel Construction
  • Heavy Equipment Manufacturing
  • Automotive and Auto Body Repair
  • Pressure Vessels and Tanks
  • Pipe Welding
  • Farm Implements and Agriculture
  • Railcar Manufacturing
  • Shaft Build-up

FAQ

Hobart HB-28 is classified as an AWS ER70S-6 solid mild steel welding wire.

This wire can be used with 100% CO2 or a mixture of Argon and CO2 (commonly 75% Argon / 25% CO2).

Yes, the ER70S-6 classification indicates high levels of silicon and manganese deoxidizers, making it very forgiving on steel with light rust, oil, or mill scale.

This product (SKU S305408-045) is a 0.045-inch diameter wire.

It requires Direct Current Electrode Positive (DCEP), also known as Reverse Polarity.

This is a 45lb (approx. 20.4kg) spool.

No, this is a solid copper-coated MIG wire and requires external shielding gas.

CATALOGUE & SPEC SHEETS

Spec Sheet
Safety Data Sheet