HYW ER309L Stainless Steel MIG Welding Wire is a low-carbon (L) austenitic stainless MIG wire (23% Cr / 13% Ni) engineered for dissimilar-metal joints and overlay work. Its higher alloy content makes it the standard choice for joining stainless to carbon or low-alloy steel and for buffer / cladding layers, while the low carbon level guards against intergranular corrosion.
Key Features
-
› Low-carbon (L) chemistry minimizes carbide precipitation and intergranular corrosion
-
› High-silicon formulation for smooth wetting, a stable arc and reduced spatter
-
› Bright, clean, X-ray quality welds with easy slag / oxide cleanup
-
› Precision-wound layer spools for consistent, tangle-free feeding
Ideal Applications
-
› Joining stainless steel to carbon or low-alloy steel (dissimilar joints)
-
› Buffer / first-layer cladding and overlay welding
-
› Welding 309 / 309S stainless base metals
-
› Heat- and corrosion-resistant fabrication
-
› Repair and maintenance of mixed-metal assemblies
Technical Specifications
| AWS Classification |
AWS A5.9 / A5.9M ER309L |
| Tensile Strength |
85,000 psi (586 MPa) typical (as-welded) |
| Wire Type |
Solid low-carbon 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 |
2 lb & 25 lb plastic spools (single rolls and multi-roll packs) |
Available Sizes & Recommended Amperage
| Diameter |
Recommended Amperage |
| .030" (0.8 mm) |
40 – 145 A |
| .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.
