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S655519-056 - Hobart Fabco 125K4 1/16" Flux-Cored Wire 600lb Drum

Packaging: 600lb exacto pak
$14.68/lb $5,508.00/600lb exacto pak only $9.18/lbSave 37%

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OVERVIEW

Heavy-Duty Performance for High-Strength Steels

When your project involves welding heavy equipment, crane booms, or critical structural components made from quenched and tempered steels, the Hobart Fabco 125K4 is the wire you can trust. This 1/16-inch flux-cored wire is built to handle the stress, delivering high-strength welds that resist cracking even under extreme conditions. If you are working with T-1 steel or similar high-yield materials, this wire provides the mechanical properties necessary to match the base metal's strength.

The Fabco 125K4 utilizes a basic slag system, which might run differently than the standard all-position wires you are used to, but the payoff is worth it. It produces welds with incredibly low hydrogen content and superior toughness, ensuring your welds hold up in freezing temperatures and high-stress environments. It runs on straight CO2 gas, keeping your shielding gas costs manageable while providing the deep penetration needed for thick sections.

Packaged in a massive 600 lb Exacto Pak, this product is ideal for shops that burn a lot of wire and want to stop wasting time on frequent spool changes. The bulk drum feeds smoothly, preventing tangles and stoppages so you can keep the arc lit and the job moving. Whether you are in shipbuilding, heavy earthmoving equipment repair, or structural fabrication, the Fabco 125K4 delivers the professional-grade reliability required for safety-critical welds.

Additional Information
Brand:Hobart
Diameter:1.6mm (1/16")
Packaging Description:600lb exacto pak
Weld Process:Flux-Cored (FCAW)
Polarity:DCEP
Position:Flat/Horizontal
AWS Classification:E121T5-K4C H4
Shielding Gas Requirement:100% CO2
Tensile Strength:125,000 psi (Typical)
Wire Type:Gas-Shielded Flux-Cored
Alloy Type:Low Alloy Steel
Slag System:Basic

INCLUDED

  • 1 x 600 lb Exacto Pak of Fabco 125K4 1/16" Flux-Cored Wire

APPLICATIONS

  • Quenched and Tempered Steels (e.g., ASTM A514, A517)
  • High-Strength Low-Alloy (HSLA) Steels
  • Heavy Equipment Manufacturing (Earthmoving, Mining)
  • Crane and Boom Construction
  • Shipbuilding and Offshore Structures
  • Power Generation Components
  • General Heavy Fabrication

FAQ

It is classified as E121T5-K4C H4.

This wire is designed for use with 100% CO2 shielding gas.

No, the T5 designation indicates it is intended for Flat and Horizontal positions only.

It is used for welding high-strength, quenched and tempered low-alloy steels requiring tensile strengths over 120 ksi.

It comes in a 600 lb Exacto Pak (Drum).

Basic slag systems provide superior low-temperature impact toughness and lower diffusible hydrogen levels compared to rutile systems.

The wire diameter is 1/16 inch.

Yes, it carries an H4 designation, indicating less than 4ml of diffusible hydrogen per 100g of weld metal.

CATALOGUE & SPEC SHEETS

Spec Sheet
Safety Data Sheet