S520808-I26 - Hobart ER309/ER309L .035 Stainless Steel MIG Welding Wire, 30lb Spool

Name: Hobart ER309/ER309L .035 Stainless Steel MIG Welding Wire, 30lb Spool
Brand: Welders Helper
SKU: S520808-I26
Price: 561.00 CAD
Availability: InStock

Packaging: 30lb spool

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SKU: S520808-I26 Categories: All Stainless Mig, Tig & Electrodes, Welding Wires and Electrodes

OVERVIEW

Hobart 309/309L: The Solution for Dissimilar Metals

When you are faced with the challenge of welding stainless steel to mild steel, you need a wire that you can trust to hold up without cracking. Hobart 309/309L .035" MIG wire is the industry standard for these tough jobs. Whether you are fabricating mounts in a food processing plant, repairing equipment in a petrochemical facility, or working on custom automotive projects, this wire bridges the gap between different metal types with ease.

Why Choose Hobart 309L?
Welding dissimilar metals can be tricky because the mixture of the two steels can often lead to brittle welds. Hobart has formulated this wire with extra Chromium and Nickel to compensate for this dilution, ensuring your welds remain ductile and strong. The "L" in 309L stands for Low Carbon, which helps protect your stainless steel from corrosion issues down the road.

Smooth Performance
Welders love this wire for its feedability and arc stability. It runs smoothly through your MIG gun liner (remember to use a Teflon or plastic liner for stainless!) and lays down a bead that looks as good as it holds. The 0.035-inch diameter is the perfect "do-it-all" size, capable of handling thin sheet metal and heavier plate alike. Packaged in a 30lb spool, it's ready for serious production work.

Versatile: Joins 304/316 stainless to mild steel.
Clean Welds: Minimal spatter means less post-weld cleanup.
Reliable: Consistent diameter and chemistry for trouble-free feeding.

Additional Information
Brand:Hobart
Diameter:0.035 in
Grade:309
Packaging:30 lb Spool
Polarity:DCEP
Weld Process:MIG (GMAW)
Material Composition:Stainless Steel
AWS Classification:ER309/ER309L
Shielding Gas Requirement:Argon/CO2 Mix, Argon/Oxygen Mix, Tri-Mix
Welding Position:All Position
Applications:Dissimilar Metal Joining, Buffer Layers, Cladding
Packaging Description:30lb spool

INCLUDED

1 x 30 lb Spool of Hobart 309/309L .035" MIG Welding Wire

APPLICATIONS

Joining 300-series stainless steel to carbon steel
Joining 300-series stainless steel to low-alloy steel
Buffer layers for cladding operations
Food and Beverage equipment fabrication
Petrochemical plant maintenance
Pulp and Paper industry machinery
General fabrication involving dissimilar metals

FAQ

For spray transfer, use 98% Argon / 2% Oxygen. For short circuit transfer, a Tri-mix (90% He / 7.5% Ar / 2.5% CO2) or an Argon/CO2 mix (like 98/2 or 95/5) is commonly used.

While it is physically possible, it is not recommended or cost-effective. 309L is designed for dissimilar metals. Using it on mild steel is expensive and unnecessary compared to ER70S-6.

Yes, when welding with stainless steel wire, it is highly recommended to use a Teflon, plastic, or carbon-fiber liner to prevent iron contamination from a steel liner, which can cause rust on the wire.

This product meets the requirements for AWS A5.9, classifications ER309 and ER309L.

The primary application is joining stainless steels (such as 304 or 316) to carbon or low-alloy steels, as well as depositing buffer layers before cladding.

This wire is designed to operate on Direct Current Electrode Positive (DCEP), also known as Reverse Polarity.

The 'L' stands for Low Carbon (0.03% max). This reduces the risk of carbide precipitation at the grain boundaries, thereby increasing resistance to intergranular corrosion.

309 alloys have good heat resistance, but for specific high-temperature service conditions, consult the engineering specifications. It is generally used for service temperatures up to roughly 700°F (370°C) in dissimilar applications to avoid sigma phase embrittlement over long durations.