HYW ER309LSi High-Silicon Stainless Steel MIG Welding Wire

HYW ER309LSi High-Silicon Stainless Steel MIG Welding Wire is a low-carbon (L), high-silicon (Si) austenitic stainless MIG wire (23% Cr / 13% Ni) engineered for dissimilar-metal joints and overlay work. The elevated silicon content improves puddle wetting and fluidity for smoother, flatter beads and reduced spatter in high-deposition production welding, while the low carbon level guards against intergranular corrosion. Supplied on large production spools. Key Features › Elevated silicon (LSi) chemistry for superior wetting, fluid puddle and flatter beads › Higher Cr / Ni alloy content ideal for dissimilar-metal and overlay welding › Low-carbon (L) base minimizes carbide precipitation and intergranular corrosion › Large 25 lb production spools for high-deposition, high-volume welding Ideal Applications › Joining stainless steel to carbon or low-alloy steel (dissimilar joints) › Buffer / first-layer cladding and overlay welding › High-volume production welding of 309 / 309S stainless › Heat- and corrosion-resistant fabrication and repair Technical Specifications AWS Classification AWS A5.9 / A5.9M ER309LSi Wire Type Solid low-carbon, high-silicon austenitic stainless steel (23% Cr / 13% Ni) Process MIG / MAG (GMAW) Polarity DC+ (DCEP / reverse polarity) Shielding Gas 98% Ar / 2% O₂, or tri-mix (90% He / 7.5% Ar / 2.5% CO₂) for short-circuit Packaging 25 lb plastic production spools Typical Chemical Composition Typical filler-wire analysis (wt %). Single values are maximums; iron is the balance. Element Typical Wire (wt %) Carbon (C) 0.03 max Chromium (Cr) 23.0 – 25.0 (typ. 24.0) Nickel (Ni) 12.0 – 14.0 (typ. 13.0) Manganese (Mn) 1.0 – 2.5 (typ. 1.8) Silicon (Si) 0.65 – 1.00 (typ. 0.85) Phosphorus (P) 0.03 max Sulfur (S) 0.03 max Iron (Fe) Balance Available Sizes & Recommended Amperage Diameter Recommended Amperage .035″ (0.9 mm) 50 – 180 A .045″ (1.2 mm) 75 – 350 A Recommended amperage ranges are general guidelines; optimal settings vary with base-metal thickness, joint design, shielding gas, and welding position. Store wire in a dry location to prevent oxidation and ensure smooth feeding. ⚠ WARNING: This product and the fumes and gases produced when welding it can expose you to chemicals including nickel and hexavalent chromium compounds, which are known to the State of California to cause cancer, and manganese, which is known to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.