TIG FILLER WIRE 309L 2.4MM STAINLESS/MILD STEEL
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Availability: 60 In stock, ready to be shipped!
TIG Filler Wire ER309L — 2.4mm | Stainless Steel to Mild Steel Welding Rod
Premium ER309L TIG Welding Wire – 2.4mm (3/32") | Dissimilar Metal & Buffer Layer Applications
Product Overview
This ER309L stainless steel TIG filler wire (2.4mm diameter) is precision-engineered for welding dissimilar metals — specifically joining stainless steel to mild/carbon steel. With its low carbon content (the "L" designation), this filler rod minimizes carbide precipitation and reduces the risk of intergranular corrosion, making it the industry-preferred choice for critical dissimilar-metal welds, buffer layers, and cladding applications.
Key Features
- Grade: ER309L (AWS A5.9 / EN ISO 14343)
- Diameter: 2.4mm (0.094" / 3/32")
- Application: Stainless steel to mild steel / carbon steel joints
- Low Carbon Formula: Reduces carbide precipitation for superior corrosion resistance
- High Chromium-Nickel Content: Delivers excellent weld strength and crack resistance
- Smooth Arc Characteristics: Consistent, spatter-free TIG welding performance
- Surface Finish: Clean, bright, oxide-free finish for optimal arc stability
Why Choose ER309L 2.4mm Filler Wire?
Ideal for Dissimilar Metal Welding ER309L is specifically formulated to handle the challenges of welding stainless steel to carbon/mild steel — a combination that regular stainless filler wires struggle with due to differing thermal expansion rates and dilution effects.
Corrosion & Crack Resistant The high chromium-nickel ratio creates a weld deposit with excellent resistance to cracking, while the low carbon content prevents sensitization during welding of thicker sections.
Versatile Applications Perfect for buffer/butter layers before overlay welding, clad steel fabrication, transition joints, and general-purpose dissimilar metal joining in industrial, marine, and structural applications.
Common Applications
- Stainless-to-mild steel transition joints
- Buffer layers before hardfacing or overlay welding
- Chemical processing equipment
- Food & beverage processing equipment
- Marine fabrication
- Piping systems with mixed metallurgy
- Structural fabrication requiring dissimilar metal joints
Technical Specifications
| Specification | Detail |
|---|---|
| AWS Classification | ER309L |
| Diameter | 2.4mm (3/32") |
| Process | GTAW (TIG) |
| Base Materials | Stainless Steel + Mild/Carbon Steel |
| Carbon Content | Low (<0.03%) |
| Standard Length | 1000mm (typical; confirm packaging) |
Ideal For
Welders, fabricators, and industrial buyers working on stainless-to-carbon steel transitions, overlay/cladding projects, and applications demanding a corrosion-resistant, crack-free weld between dissimilar base metals.
