Package Price:
$125.00/1of1In stock
The Central Wire (CWI) ER309LSi is a top-tier solid stainless steel MIG welding wire designed specifically for the demanding task of joining dissimilar metals. This 10lb spool of 0.035-inch diameter wire is formulated with a higher silicon content than standard 309L, providing significant advantages in weldability and bead appearance. The "Si" in the classification stands for high silicon, which increases the fluidity of the weld pool. This enhanced fluidity improves the wetting action, allowing the molten metal to wash into the toes of the weld more effectively, resulting in a flatter, smoother bead profile with minimal need for post-weld grinding.
Fabricators frequently rely on ER309LSi when welding Type 304 or 316 stainless steels to mild or carbon steels. It is also the go-to choice for depositing buffer layers on carbon steel prior to cladding with 308 or 316 grades. The chemistry of this wire is carefully balanced to handle the dilution from carbon steel base metals while maintaining a ductile, crack-resistant austenitic microstructure. Additionally, the "L" designation indicates a low carbon content (maximum 0.03%), which is crucial for preventing carbide precipitation and ensuring resistance to intergranular corrosion, particularly in high-temperature service environments.
Central Wire Industries is renowned for its rigorous quality control and precision manufacturing. This wire features a clean, consistent surface finish that promotes stable electrical conductivity and smooth feeding through MIG gun liners, reducing downtime caused by bird-nesting or contact tip burn-back. Whether you are working on automotive exhaust systems, general fabrication, or industrial maintenance, the CWI ER309LSi offers the reliability and performance professional welders demand.
| Additional Information |
|---|
| Brand:Central Wire |
| AWS Spec:ER309LSi |
| Diameter:0.035 in |
| Grade:309 HiSil |
| Packaging:10 lb Spool |
| Weld Process:MIG (GMAW) |
| Polarity:DCEP |
| Material Composition:Stainless Steel (High Silicon) |
| Wire Type:Solid |
| Shielding Gas Requirement:Argon/CO2 Mix, Argon/Oxygen Mix, Tri-Mix |
| Spool Size:10 lb |
| Applications:Dissimilar Metal Joining, Buffer Layers, General Fabrication |
| Packaging Description:1of1 |
