ER309L Stainless Steel TIG Welding Filler Rod is a high-chromium, low-carbon austenitic stainless steel filler rod engineered for dissimilar-metal joints and corrosion-resistant TIG (GTAW) welds. Supplied as straightened 36" (914 mm) cut lengths in 1/16", 3/32", and 1/8" diameters and 1, 2, 5, and 10 lb packs, it is the standard choice for joining stainless steel to carbon or low-alloy steel and for first-layer overlay on carbon steel. Select your diameter and pack size above.
Key Features
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› High Cr/Ni (23.5% Cr / 13.5% Ni) deposit ideal for dissimilar-metal joints
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› Low-carbon (≤0.03% C) chemistry resists carbide precipitation and intergranular corrosion
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› Excellent crack resistance when welding stainless to carbon or low-alloy steel
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› Smooth, stable arc with a bright, clean weld deposit
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› Straightened 36" cut lengths for consistent, easy handling
Ideal Applications
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› Joining 309/309L and dissimilar stainless-to-carbon steel joints
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› First-layer (buffer) overlay and cladding on carbon steel
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› Welding 304/304L where extra ferrite is beneficial
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› High-temperature service and heat-resistant fabrication
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› General stainless steel fabrication and repair
Technical Specifications
| AWS Classification |
AWS A5.9 / A5.9M ER309L |
| Tensile Strength |
75,000 psi (520 MPa) minimum |
| Rod Type |
Solid austenitic stainless steel (23.5% Cr / 13.5% Ni, ≤0.03% C) |
| Cut Length |
36" (914 mm) |
| Process |
TIG (GTAW) |
| Polarity |
DCEN (straight polarity) |
| Shielding Gas |
100% Argon |
| Available Packs |
1 lb & 2 lb tubes; 5 lb & 10 lb boxes |
Available Sizes & Recommended Amperage
| Diameter |
Recommended Amperage |
| 1/16" (1.6 mm) × 36" |
70 – 110 A |
| 3/32" (2.4 mm) × 36" |
100 – 160 A |
| 1/8" (3.2 mm) × 36" |
120 – 210 A |
Recommended amperage ranges are general guidelines; optimal settings vary with base-metal thickness, joint design, tungsten selection, and welding position. Store filler rod in a dry location to prevent oxidation and ensure clean welds.
