The ER309L 3/32" TIG Welding Rod is a high-grade austenitic stainless steel filler metal designed specifically for the Gas Tungsten Arc Welding (GTAW) process. Manufactured to meet rigorous AWS A5.9 specifications, this alloy is characterized by its high chromium (approx. 23-25%) and nickel (approx. 12-14%) content. This specific chemical composition provides superior heat resistance and corrosion resistance compared to standard 304 or 308 grades. The 'L' designation indicates a low carbon content (maximum 0.03%), which is critical for preventing carbide precipitation during the welding process, thereby reducing the risk of intergranular corrosion in the heat-affected zone (HAZ).
This rod is engineered for critical industrial applications where metallurgical integrity is paramount. It is most frequently utilized for joining dissimilar metals, such as welding Type 304 or 308 stainless steel to carbon steel or low-alloy steels. The higher alloy content of ER309L allows for dilution with the mild steel base metal while still maintaining a stainless microstructure in the weld bead. It is also the standard choice for applying the first layer of stainless cladding over carbon steel (buffer layers) before filling with 308L. The 3/32" (2.4mm) diameter offers excellent deposition rates for medium-thickness base materials, typically ranging from 1/8" to 1/4" thick, making it a versatile stock item for fabrication shops and maintenance departments.
Technical Specifications:
In industrial environments, the ER309L is essential for petrochemical, food processing, and power generation sectors where transition joints between piping systems of different materials are common. Its resistance to oxidation at high temperatures also makes it suitable for certain furnace parts and heat treatment equipment repairs.
| Additional Information |
|---|
| Diameter:2.5mm (3/32") |
| Alloy Type:ER309L Stainless Steel |
| Process:TIG (GTAW) |
| Material:Stainless Steel |
| AWS Classification:AWS A5.9, ER309L |
| Shielding Gas Requirement:100% Argon |
| Polarity:DCEN |
| Tensile Strength:85,000 PSI (Approx) |
| Elongation:35-40% |
| Rod Length:36 Inches |
| Applications:Dissimilar Metal Joining, Buffer Layers, Cladding |
| Packaging Description:10 lb tube |
| Weld Process:TIG (GTAW) |
| AWS Spec:ER309L |
| Packaging:10 lb Tube |
| Grade:309 |
| Brand:Central Wire |
