Home > Electrodes > AWS Class ER309/309L Mig & Tig Filler Welding Wire & Rod
ER309L is a type of stainless steel filler metal that falls under the AWS / ASME A5.9 / SFA‑5.9 standards (with UNS S30983 for ER309L and UNS S30980 for ER309). It’s suitable for both MIG (GMAW) and TIG (GTAW) welding processes. The “L” in its name indicates that it has a low carbon content (maximum ~0.03 %), which helps minimize carbide precipitation and enhances resistance to intergranular corrosion. The typical chemical makeup includes about ~23‑25 % chromium (Cr), ~12‑14 % nickel (Ni), manganese (Mn) ranging from 1.0‑2.5 %, silicon (Si) around ~0.30‑0.65 %, molybdenum (Mo) up to ~0.75 %, phosphorus (P) ≤ 0.03 %, sulfur (S) ≤ 0.03 %, and copper (Cu) up to ~0.75 %. ([oxfordalloys.com][1])
Welds created with ER309L wire or rod generally exhibit impressive strength and ductility. The typical tensile strength hovers around **580‑620 MPa** (approximately 84,000‑90,000 psi), while the yield strength (0.2 % offset) is about **380‑400 MPa** (around 55,000‑60,000 psi). You can expect elongation in the weld metal to be around **35‑40 %** or even more. The reduction of area and impact resistance are also quite commendable for various duty environments. Thanks to its unique composition and low carbon content, the weld maintains toughness and effectively resists cracking and corrosion, even under heat and when welding dissimilar metals. ([hindustaninox.com][2])
| Classification | AWS A5.9, ER309/309L |
| Form | MIG spools, TIG cut lengths, Reels and Coils |
| Type Of Welding | Inert Gas Welding |
| Current | MIG-DCEP / TIG-DCEN |
| Diameters | .023”, .030”, .035”, .045”, 1/16”, 3/32”, 1/8” |
| Standard TIG straight lengths are available | 36” (914 mm) or 39” (1000 mm) lengths. Other lengths available upon request. |
| AWS ER309/309L MIG & TIG Filler Metal Application & uses |
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| C | Cr | Ni | Mo | Mn | Si | P | S | Cu |
| 0.03 | 23.0-25.0 | 12.0-14.0 | 0.75 | 1.0-2.5 | 0.30-0.65 | 0.03 | 0.03 | 0.75 |
| Tensile Strength, kpsi: | 86* |
| Yield Strength, kpsi: | 58* |
| Elongation %: | 40* |
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Stainless Steel ER309/309L MIG Filler Wire provides strong, corrosion-resistant welds for dissimilar metals, ideal for welding stainless steel to carbon steel in industries requiring high-quality, durable joints.
Stainless Steel ER309/309L TIG Filler Wire is designed for welding dissimilar metals, offering excellent strength and corrosion resistance, suitable for high-temperature applications and critical joints in power generation and industrial sectors.
Stainless Steel ER309/309L TIG Filler Rod ensures high-strength, corrosion-resistant welds for dissimilar metal joints, ideal for applications in petrochemical, power generation, and industrial fabrication requiring reliable and durable performance.
Each AWS Class ER309/309L MIG and TIG Filler Welding Wire and Rod is carefully packed using high-quality materials to prevent any damage or defects during shipping. We focus clients satisfaction by assuring timely delivery through efficient transportation. All relevant documents pertaining to the product are provided to clients at the time of delivery guaranteeing a smooth transaction.
ER309 / ER309L filler metals are commonly employed for welding stainless steels in harsh or high-temperature settings, as well as for joining stainless steel to carbon or low alloy steel. Some typical applications include the fabrication or repair of furnace components, heat exchangers, boilers, industrial ovens, annealing chambers,
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