TOKO AWS A5.4 E309L Welding Electrode
TOKO E309L Stainless Steel, All-Position Electrode for High-temperature equipment (furnaces, exhaust systems), is used for welding austenitic stainless steels to other stainless-steel types. It is also used for welding of stainless steel to low alloy steel, carbon steel, mild steel and cast Steel.
Key Advantages
- AWS A5.4 Compliance: Certified stainless steel electrode for high-temperature applications.
- Dissimilar Metal Welding: Ideal for joining stainless steel to carbon steel and other alloys.
- High-Temperature Resistance: Excellent performance in furnace and exhaust system applications.
- All-Position Capability: Suitable for welding in all positions.
- Low Carbon Content: Minimizes sensitization in high-temperature environments.
Classification & Specification
- AWS Classification: Compliant with AWS A5.4 E309L standards.
- Material Compatibility: Austenitic stainless steels, carbon steel, low alloy steel, and cast steel.
- Specialty: Designed for dissimilar metal welding and high-temperature applications.
Common Applications
- High-temperature equipment (furnaces, exhaust systems)
- Dissimilar metal welding (stainless to carbon steel)
- Petrochemical industry equipment
- Power generation applications
- Food processing equipment
- Cladding/overlaying carbon steel for corrosion resistance
Technical Specifications
Chemical Composition (Typical Weld Metal)
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 23-25% |
| Nickel (Ni) | 12-14% |
| Carbon (C) | ≤0.03% |
| Manganese (Mn) | Trace amounts |
| Silicon (Si) | Trace amounts |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ~620 MPa (90 ksi) |
| Elongation | 35-40% |
| Corrosion Resistance | Superior in high-temperature environments |
| Magnetic Properties | Non-magnetic (austenitic structure) |
Operating Characteristics
- Polarity: DC+ (direct current electrode positive).
- Preheat/Interpass Temperature: Generally unnecessary for thin sections; maintain ≤150°C (300°F) for thick materials.
- Post-Weld Treatment: Stress relief annealing may be required for critical applications.
- Storage: Keep in dry conditions to prevent moisture pickup.
TOKO-Specific Features
- Arc Stability: TOKO electrodes are known for smooth arc characteristics and minimal spatter.
- Slag Removal: Easy slag detachment improves weld efficiency.
- Certifications: Meets international standards (e.g., ISO, EN) for quality assurance.
- Weld Quality: Produces high-quality welds with excellent appearance and performance.
Technical Documentation
✅ For specific guidance and welding parameters, refer to TOKO's technical datasheets and welding procedure specifications.