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OJ309LP00000450F00 - Kobelco Premiarc DW-309LP .045 Stainless Flux Core Wire 28lb

Packaging: 28lb spool
$36.98/lb $647.08/28lb spool only $23.11/lbSave 38%

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OVERVIEW

Master Dissimilar Welds with Kobelco DW-309LP

If you are welding stainless steel to mild steel and need a wire that behaves itself in every position, the Kobelco Premiarc DW-309LP is your answer. This isn't just another flux core wire; it's built for the real-world challenges welders face when fitting up tanks, pipes, or structural supports where you can't always rotate the piece to the flat position. The 'LP' stands for 'Low Carbon, Positional', and it lives up to the name. You can run a vertical-up stringer that lays flat, wets out at the toes, and doesn't drip on you.

One of the biggest headaches with stainless flux core is the slag. Kobelco has nailed the formula here—the slag cools fast to hold your puddle in place but pops off easily once you're done. Often, it just curls up and falls off by itself as the weld cools, leaving a shiny, bright bead underneath that looks like you spent hours polishing it. This 28lb spool of .045" wire is the perfect size for industrial feeders, giving you plenty of run time between changeovers.

Whether you are using straight CO2 to save money or an Argon mix for that buttery smooth feel, this wire runs stable with almost zero spatter. It’s perfect for those transition joints where you are welding a stainless bracket to a mild steel frame, or putting a buffer layer down before hardfacing. Stop fighting your puddle and start stacking dimes in any position with the DW-309LP.

Additional Information
Brand:Kobe
Diameter:0.045 in
Grade:309
Packaging:28 lb Spool
Weld Process:MIG (GMAW)
Polarity:DC
AWS Classification:E309LT1-1, E309LT1-4
Shielding Gas:100% CO2, 75% Argon / 25% CO2
Wire Type:Gas-Shielded Flux-Cored
Welding Position:All Position
Material Application:Stainless to Mild Steel, Buffer Layers, Clad Steels
Packaging Description:28lb spool
AWS Spec:E309L-17

INCLUDED

  • 1 x 28lb Spool of Kobelco Premiarc DW-309LP .045" Flux Cored Wire

APPLICATIONS

  • Joining stainless steel (AISI 304/304L) to carbon steel or low-alloy steel
  • Buffer layers on carbon steel prior to overlaying with 308L or 316L
  • Structural fabrication involving dissimilar metal joints
  • Shipbuilding and offshore platform construction
  • Chemical and petrochemical process piping
  • General fabrication requiring all-position stainless welding

FAQ

You can use either 100% CO2 or a mixture of 75% Argon and 25% CO2. The mixed gas generally produces a smoother arc and less spatter, but CO2 provides deeper penetration.

Yes, the 'LP' in DW-309LP stands for positional capabilities. It is specifically formulated with a fast-freezing slag to support the puddle in vertical-up and overhead positions.

It meets AWS A5.22 specifications for E309LT1-1 (when used with 100% CO2) and E309LT1-4 (when used with 75% Ar / 25% CO2).

While it will physically weld, it is not recommended for 316 stainless if corrosion resistance is critical, as 309L lacks Molybdenum. Use 316L wire for 316 base metals. 309L is best for 309 to 309 or Stainless to Mild Steel.

This wire runs on DCEP (Direct Current Electrode Positive).

Flux cored wire generally offers higher deposition rates, better penetration, and the flux helps clean the weld metal, making it more forgiving on slightly dirty surfaces compared to solid wire.

The typical Ferrite Number (FN) is between 13 and 20, which provides excellent resistance to hot cracking, essential for dissimilar metal welding.

Yes, as it is a flux-cored wire, it leaves a slag covering that must be chipped or brushed off. However, the slag is designed to be self-peeling in many cases.