1651119820 - ESAB OK Autrod 309LSi Stainless MIG Wire 0.045 15kg Spool

ESAB OK Autrod 309LSi: Premium Stainless Steel MIG Wire for Dissimilar Joints

The ESAB OK Autrod 309LSi is a high-quality, continuous solid corrosion-resistant chromium-nickel wire designed for the Gas Metal Arc Welding (GMAW) of dissimilar steels. Specifically engineered with a higher silicon content than standard 309L wires, this consumable offers superior welding properties, particularly in terms of wetting action and bead profile fluidity. This makes it an exceptional choice for industrial applications requiring both structural integrity and aesthetic weld finishes. The wire is formulated to meet the rigorous AWS ER309LSi classification, ensuring consistent performance in demanding environments.

One of the primary applications for the OK Autrod 309LSi is the welding of stainless steels to unalloyed or low-alloyed steels. This capability makes it indispensable in fabrication shops that handle mixed-material projects. It is also extensively used for depositing buffer layers on carbon-manganese steels prior to the application of a final layer of 308L or 316L filler metal. The low carbon content of the wire minimizes the risk of carbide precipitation, thereby increasing resistance to intergranular corrosion. The alloy composition is balanced to provide a ferrite content that ensures high resistance to hot cracking, a common issue in fully austenitic weld metals.

When using the OK Autrod 309LSi for buffer layers and dissimilar joints, controlling the dilution of the weld is critical to maintaining the desired metallurgical properties. The high silicon content aids in this process by improving the fluidity of the weld pool, allowing for faster travel speeds and smoother transitions at the weld toes. This wire is suitable for use with shielding gases such as Ar+2% O2 or Ar+2-3% CO2, providing flexibility depending on the specific welding procedure specification (WPS). The 15kg spool size is optimized for high-volume production environments, reducing downtime associated with spool changes.

In addition to its joining capabilities, the OK Autrod 309LSi exhibits excellent general corrosion resistance. While primarily designed for dissimilar joining, it can also be used for welding 309-type base metals. The wire's surface finish and precision winding ensure stable feedability, reducing wear on liners and contact tips, which is essential for automated or robotic welding setups. By choosing ESAB's OK Autrod series, fabricators benefit from a legacy of metallurgical expertise and quality assurance.