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S527508-550 - Hobart ER309LSi .035" Stainless MIG Wire - 550lb Drum

Packaging: 550lb drum
$37.54/lb $12,903.00/550lb drum only $23.46/lbSave 38%

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SKU: S527508-550 Categories: ,

OVERVIEW

Industrial-Grade Dissimilar Metal Welding Solution

The Hobart 309L Hi Sil .035" MIG Wire in a 550 lb drum is a premium consumable designed for high-volume manufacturing environments where efficiency and metallurgical integrity are paramount. This solid welding wire conforms to the AWS ER309LSi classification, featuring a nominal composition of 24% chromium and 13% nickel. The "L" designation indicates a low carbon content (maximum 0.03%), which is critical for minimizing carbide precipitation and preventing intergranular corrosion in the weld zone. This makes it an exceptional choice for applications requiring high corrosion resistance and durability.

The defining characteristic of this specific alloy is its "Hi Sil" (High Silicon) formulation. The increased silicon content acts as a deoxidizer and significantly improves the fluidity of the weld pool. For industrial operators, this translates to faster travel speeds and a flatter, smoother bead profile that ties in exceptionally well at the toes of the weld. This improved wetting action is particularly beneficial when welding stainless steel to carbon steel or low-alloy steels, ensuring a sound metallurgical bond with minimal defects.

Packaged in a substantial 550 lb (approx. 250 kg) drum, this product is engineered for automation and continuous welding operations. The bulk packaging drastically reduces the frequency of changeovers compared to standard spools, thereby increasing arc-on time and overall throughput. The wire is precision-wound to ensure tangle-free feeding through long conduit runs, which is essential for robotic cells and boom-mounted wire feeders. Whether used for barrier layers in cladding operations or for joining 304 stainless to mild steel in structural components, the Hobart 309LSi delivers consistent, high-quality results.

Key Technical Specifications

  • Classification: AWS A5.9 ER309LSi
  • Diameter: 0.035 inches (0.9 mm)
  • Packaging: 550 lb Drum
  • Shielding Gas: Argon/CO2 or Argon/Oxygen mixtures recommended
  • Current: DCEP (Direct Current Electrode Positive)
Additional Information
Packaging Description:550lb drum
AWS Spec :ER309LSI
Diameter:0.035
Grade:309 HISI
Packaging:550lb drum
Weld Process:MIG
Polarity:DC+
Material Composition:Stainless Steel
Wire Type:Solid
Shielding Gas Requirement:Argon/CO2 Mix, Argon/Oxygen Mix
Applications:Automotive Exhaust, Buffer Layers, Dissimilar Metal Joining, General Fabrication
AWS Classification:ER309LSi
----- new values below ----
Material Composition:Stainless Steel
Wire Type:Solid
Shielding Gas Requirement:Argon/CO2 Mix, Argon/Oxygen Mix
Applications:Dissimilar Metal Joining, Buffer Layers, Automotive Exhaust, General Fabrication
AWS Classification:ER309LSi
Brand:Hobart
AWS Spec:ER309LSI
Diameter:0.035
Grade:309 HISI
Packaging:550lb drum
Weld Process:MIG
Polarity:DC+

INCLUDED

  • 1 x 550 lb Drum of Hobart 309L Hi Sil .035" MIG Wire

APPLICATIONS

  • Joining stainless steel (e.g., 304/304L) to carbon or low-alloy steel
  • Buffer layers on carbon steel prior to cladding with 308L
  • Automotive exhaust systems
  • General fabrication involving dissimilar metals
  • Petrochemical equipment manufacturing
  • Robotic and automated welding cells

FAQ

The higher silicon content improves the fluidity of the weld puddle, resulting in better wetting action, a flatter bead profile, and faster travel speeds compared to standard 309L.

Yes, ER309LSi is the standard choice for joining 300-series stainless steels to carbon or mild steels.

For MIG welding, a mixture of Argon with 2-5% CO2 or 1-2% Oxygen is typically recommended to ensure arc stability and proper fusion.

Yes, 550 lb drums usually require a drum cone or payoff hood and a conduit system to guide the wire to the feeder without tangling.

The 'L' stands for Low Carbon. This reduces the risk of carbide precipitation during welding, which helps maintain corrosion resistance in the heat-affected zone.

While 0.035" solid wire can be used out-of-position with short-circuit transfer, the high silicon fluidity makes it slightly more challenging than standard wire; pulsed MIG is often preferred for out-of-position work with stainless.

It is manufactured to standard AWS tolerances for 0.035-inch (0.9mm) wire to ensure consistent contact tip fitment.

Yes, it is frequently used as a buffer layer on carbon steel before applying a final layer of 308L or other stainless alloys.

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