Lincoln Electric Blue Max® 309LSi | 0.035" x 33lb | ED037291

Lincoln Electric Blue Max MIG 309LSi Stainless Steel Welding Wire – 0.035 in, 33 lb Spool (ED037291)

Lincoln Electric’s Blue Max MIG 309LSi wire (ED037291) is designed for high-performance MIG welding of dissimilar metals and stainless-to-carbon steel joints. This 0.035-inch diameter ER309LSi wire offers excellent arc stability, superior weld puddle control, and enhanced corrosion resistance, especially in high-temperature or aggressive environments.

The high silicon content improves arc characteristics and promotes smooth, uniform weld beads with minimal spatter and reduced post-weld cleanup. Its low carbon formulation helps minimize carbide precipitation, making it ideal for structural and pressure applications where corrosion resistance and long-term durability are critical.

Technical Specifications:

• AWS Classification: ER309LSi

• Diameter: 0.035 in 

• Spool Size: 33 lb

• High silicon for improved weld bead shape and flow

• Low carbon to reduce risk of intergranular corrosion

• Recommended shielding gas: 98% Argon / 2% O₂ or suitable Ar-based mixes

• Supports both manual and automated MIG systems

Common Applications:

• Joining stainless steel to carbon steel

• Overlay and buffer layers in corrosion-resistant cladding

• Piping and pressure vessel fabrication

• Power generation and petrochemical infrastructure

• Food-grade and pharmaceutical-grade stainless assemblies

Product Advantages:

• Reliable feedability in high-volume production environments

• Stable arc and low spatter for cleaner welds

• Exceptional corrosion and heat resistance

• Reduces the likelihood of cracking and weld defects in critical joints

Engineered for Demanding Welds

Lincoln Electric’s Blue Max 309LSi wire is a top choice for fabricators who require consistent performance and strong metallurgical bonds across dissimilar base metals. Whether you're performing stainless overlays or structural welding, this wire delivers the quality and dependability needed in professional welding operations.

In Stock and Ready to Ship

Order the Lincoln Electric Blue Max 309LSi Stainless MIG Wire (ED037291) today for fast delivery. Ideal for stainless steel fabrication, dissimilar metal joints, and industrial-grade welding, this wire is built for precision, strength, and efficiency.