HYW ER309LSi High-Silicon Stainless Steel MIG Welding Wire
Regular price
$154.72
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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.