 | ER309L Stainless Steel TIG ROD |
AWS: AWS A5.9 – ER309L
A high-silicon, low-carbon austenitic stainless steel solid welding wire designed for joining dissimilar steels and stainless steels. The increased silicon content improves molten-metal fluidity and wetting, providing smooth wire feeding, stable arc performance, low spatter and an attractive weld appearance.
Applications
Petrochemical Equipment
Dissimilar Steel Welding
Pressure Vessels & Petrochemical Equipment
Stainless Steel Fabrication
Welding Stainless Steel to Carbon / Low-Alloy Steel
Features
Good Corrosion Resistance
Stable Arc
Low Spatter
Smooth Weld Appearance
Good Mechanical Properties
All-Position Welding
Typical Chemical Composition (%)
C | Mn | Si | Cr | Ni | Mo | P | S | Cu |
≤0.03 | 1.0-2.5 | 0.65-1.00 | 23.0-25.0 | 12.0-14.0 | ≤0.75 | ≤0.03 | ≤0.03 | ≤0.75 |
AWS standard limits; single values shown with ≤ are maximum values.
Typical Mechanical Properties
Tensile Strength | Elongation | Shielding Gas | Gas Flow | Polarity |
600 MPa | 41% | 98% Ar + 2% O₂ | 20–25 L/min | DC+ |
Recommended Welding Parameters (DC+)
Wire Size | Flat / Horizontal Current | Voltage | Vertical-Up Current | Voltage | Overhead Current | Voltage |
0.8 mm | 70–150 A | 20–25 V | 50–120 A | 19–23 V | 50–120 A | 19–23 V |
1.0 mm | 100–200 A | 22–28 V | 80–150 A | 20–25 V | 80–150 A | 20–25 V |
1.2 mm | 140–220 A | 23–33 V | 120–180 A | 24–28 V | 160–200 A | 26–30 V |
Welding Position
Flat · Horizontal · Vertical-Up · Overhead
Welding Notes
• Clean rust, moisture, oil, dust and other contaminants from the weld area before welding.
• Recommended shielding gas: 98% Ar + 2% O₂; maintain a gas flow of approximately 20–25 L/min.
• Maintain a wire stick-out of approximately 15–25 mm and use suitable welding parameters.
• For outdoor welding, provide adequate wind protection when wind speed exceeds 1.5 m/s.
• Use controlled heat input and proper welding technique to maintain corrosion resistance and weld appearance.
