StarBlaze MIG 307Si
AWS A5.9: ER 307Si | EN ISO 14343-A: G 18 8 Mn Si
StarBlaze MIG 307Si is a precision layer-wound solid wire designed for MAG welding of stainless and heat-resistant steels. It deposits a Cr-Ni-Mn alloyed weld metal (C-18Cr8Ni6Mn) and delivers excellent arc stability with a smooth bead appearance. Especially suited for welding dissimilar steels, including unalloyed to austenitic stainless, and hard-to-weld materials like ballistic and armour-grade steels. Compatible with short, spray, or pulsed arc welding using Ar+O₂ or Ar+CO₂ gas blends.
- Pack Size: 12.5 kg and 15 kg spools (SD300/BS300)
- Diameters: 0.6 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.6 mm
Key Features
- Excellent for dissimilar joint welding (“black-white” steels)
- High manganese content for added strength and toughness
- Enhanced silicon improves weld pool fluidity and bead finish
- Supports pulsed, spray, and short arc MIG processes
- Withstands high mechanical stress and impact
- Stable arc performance with mixed shielding gases
- Precision layer-wound for smooth, uninterrupted feeding
Industries
- Defence and Armoured Vehicle Manufacturing
- Heavy Machinery and Equipment Fabrication
- Automotive and Transport
- Construction and Structural Fabrication
- Industrial Maintenance and Repairs
Processes
- MIG/MAG welding with Ar+2%O₂ or Ar+0.5–5%CO₂
- Welding dissimilar steels and armour-grade materials
- Pulsed arc welding for varied plate thicknesses
- Short arc for thin-gauge, positional welding
Additional Details
- Recommended shielding gases: Ar + 1–2% CO₂ or Ar + 1–2% O₂
- Suitable for both structural and high-strength applications
- Welding current: DC (+)
- Store in dry conditions; avoid condensation
Product Details
Typical Chemical Composition (%)
| C | Mn | Si | Cr | Ni | Mo | Cu | S | P |
| 0.20 max | 5.00-8.00 | 1.20 max | 17.00-
20.00 |
7.00-10.00 | 0.30 max | 0.30 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 |
| ≥ 420 | ≥ 590 | ≥ 40% | ≥ 100 |
Recommended Welding Data
| Shielding Gas | Unit | 0.8 mm | 1.0 mm | 1.2 mm |
| 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 |
