309L Tig Filler Wire

ER309L TIG Filler Wire — Dissimilar and Stainless Welding Specialist

ER309L is a low-carbon stainless steel TIG filler wire designed for joining stainless to stainless, or stainless to mild or low-alloy steels. The “L” designation indicates reduced carbon content (≤ 0.03%), which minimizes carbide precipitation and maintains corrosion resistance after welding. Its high chromium and nickel content provide strength and durability in demanding environments.

Key Features

• High Chromium and Nickel Content – Offers excellent corrosion resistance and strength in oxidizing environments.

• Low Carbon Design – Prevents intergranular corrosion, maintaining weld integrity in stainless applications.

• Versatile Compatibility – Ideal for joining stainless to mild steel or for buffer layers before hardfacing.

• Smooth Arc and Good Wetting – Produces stable arcs, minimal spatter, and attractive bead appearance.

• Reliable Mechanical Properties – Typical tensile strength around 590 MPa, yield strength near 400 MPa, and elongation of 30–40%, depending on conditions.

• Available Diameters – Common sizes include 1.6 mm, 2.4 mm, and 3.2 mm to suit a range of thicknesses.

Ideal Applications

• Welding 304/304L stainless steel and similar austenitic grades.

• Dissimilar metal joining, such as stainless to carbon or low-alloy steels.

• Buffer or cladding layers where corrosion resistance and toughness are required.

• Food processing equipment, chemical industry piping, and kitchen or architectural stainless work.

The ER309L TIG Filler Wire is the go-to choice for strong, corrosion-resistant welds on stainless steels and mixed metal joints, ensuring durability and a clean finish even in challenging service conditions.