StarBlaze SAW 309
AWS A5.9: ER 309 | EN 12072: 23 12
StarBlaze SAW 309 is a stainless steel welding wire designed for Submerged Arc Welding (SAW) applications requiring dissimilar metal joining and barrier layer deposition. With a 23Cr/12Ni composition, it is ideal for welding mild steel to stainless steel or for depositing an intermediate layer before welding with 308-grade stainless steel. Controlled carbon and ferrite levels ensure improved microstructural stability and high-temperature strength. It also performs well in corrosion surfacing applications when paired with a suitable flux.
- Diameters: 2.00 mm, 2.40 mm, 3.20 mm, 4.00 mm
- Pack size: 25 kg / 60 lbs
Key Features
- Designed for dissimilar metal welding (carbon steel to stainless steel)
- Suitable for barrier layers and intermediate deposition
- Controlled ferrite and carbon for high-temp strength and structural integrity
- Excellent weldability with consistent arc characteristics
- Ideal for corrosion-resistant surfacing with compatible flux
- Precision layer-wound for smooth wire feeding
- Supports structural and cladding applications in demanding environments
Industries
- Pressure Vessel and Boiler Fabrication
- Refining and Petrochemical Equipment
- Structural Steel Overlays
- Process and Utility Piping
- Dissimilar Metal Construction and Maintenance
Processes
- Submerged Arc Welding (SAW) with compatible flux
- Dissimilar joints (mild steel to stainless)
- Barrier layers for overlay welding
- Structural and corrosion-resistant cladding
Additional Details
- Suitable for welding dissimilar metals (mild steel to stainless steel) and barrier layers
- Ideal for depositing intermediate layers before 308 stainless overlays
- Controlled carbon and ferrite content for improved microstructural stability
- Excellent high-temperature strength and corrosion resistance
- Anti-spatter reagent coated (di-chloromethane + methylene chloride)
- Welding current: DC (+)
- Welding Positions: Flat/horizontal (standard for SAW)
- Materials to be Welded:
- Carbon steel to stainless steel joints
- A312 TP309S
- Ferrite-austenite heterogeneous joints (“Black-White”)
- Surfaces requiring corrosion-resistant overlays
- Storage: Keep dry; avoid condensation
- Note: Flux chemistry affects weld metal composition and corrosion resistance
Product Details
Typical Chemical Composition (%)
| C | Mn | Si | Cr | Ni | Mo | Cu | S | P |
| 0.12 max | 1.00 – 2.50 | 0.30 – 0.65 | 23.00 – 25.00 | 12.00 – 14.00 | 0.50 max | 0.50 max | 0.03 max | 0.03 max |
Typical All-Weld Mechanical Properties
| Yield Strength (N/mm²) | Tensile Strength (N/mm²) | Elongation A5 (%) | Impact Energy ISO-V(J) 20°C |
| ≥ 350 | ≥ 520 | ≥ 30% | ≥ 50 |
Recommended Welding Data
| Diameter (mm) | 2.00 | 2.40 | 3.20 | 4.00 |
| Current (A) | 190 – 500 | 300 – 500 | 300 – 500 | 300 – 500 |
| Voltage (V) | 24 – 30 | 26 – 30 | 28 – 30 | 28 – 32 |
