StarBlaze MIG 309
AWS A5.9: ER 309 | EN ISO 14343-A: G 23 12
StarBlaze MIG 309 is a solid stainless steel MIG wire with a high-carbon 25Cr/12Ni composition, suitable for welding AISI 309 and dissimilar steels, including carbon steel to stainless steel joints. It is also used for buffer layers and buttering applications in 18Cr/8Ni steels. The wire offers excellent oxidation and corrosion resistance in continuous service temperatures up to 300°C. Precision layer winding ensures smooth feeding and reliable arc performance across all welding positions.
- Diameters: 0.6 mm – 1.6 mm
- Pack size: 1 kg, 5 kg, 12.50 kg, 15 kg
Key Features
- Ideal for welding AISI 309 and dissimilar metal joints
- Excellent for buffer layers and buttering on 18-8 stainless steels
- Withstands oxidation and corrosion in service up to 300°C
- High mechanical strength and reliable elongation
- Precision-wound for smooth, trouble-free wire feeding
- Compatible with short, spray, and pulsed arc welding
- Strong arc stability with minimal spatter
Industries
- Petrochemical and Oil Refineries
- Thermal Power and Heat Treatment Plants
- Fabrication of Pressure Vessels and Piping
- Stainless and Carbon Steel Joint Applications
- Process Equipment Manufacturing
Processes
- MIG welding with Ar+2%O₂ or Ar+2–3%CO₂
- Welding carbon steel to stainless steel
- Buffer layer or buttering on stainless surfaces
- Pulsed arc for all-position welding and varying thicknesses
Additional Details
- Shielding Gas: 98% Ar + 2% O₂ or Ar + 2–3% CO₂
- Current: DC (+)
- Welding Positions: All positions with pulsed arc
- Offers excellent oxidation resistance up to 300°C
- Ideal for applications involving surfacing and buttering on mild steels
- Storage: Keep dry; avoid condensation
Product Details
Typical Chemical Composition (%)
| C | Mn | Si | Cr | Ni | Mo | Cu | S | P |
| 0.12 max | 1.50 – 2.20 | 0.35 – 0.65 | 23.00 – 25.00 | 12.00 – 14.00 | 0.25 max | 0.25 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 | ≥ 550 | ≥ 30% | ≥ 47 |
Recommended Welding Data
| Shielding Gas | Unit | 0.8 | 1.0 | 1.2 |
| Ar + 1–2% CO₂ | Amp | 40-120 | 80-160 | 100-210 |
| Volt | 15-20 | 16-22 | 17-22 | |
| Ar + 1–2% O₂ | Amp | 160-210 | 180-280 | 200-300 |
| Volt | 24-28 | 24-30 | 24-30 |
