
MIG/MAG welding wire for mild steels
NOVOFIL SG3 is a copper coated gas metal arc welding wire in 15 kg spools or 250 kg drums. It is particularly designed for semi-automatic and full-automatic GMAW applications.
NOVOFIL SG3 is suitable for GMA welding of un-alloyed structural steels with a tensile strength up to 540 N/mm², ship plates and fine-grained C-Mn steels. It gives high-strength weld metal at working temperatures varying between −50 and 450 °C. It contains higher Si and Mn than SG2 welding wire. Increased silicon improves wettability.
100% CO₂ or 80% Ar + 20% CO₂ are used for gas shielding.
ISO 14175 / EN 439
| ⌀ mm | 0.60 | 0.80 | 0.90 | 1.00 | 1.20 | 1.60 |
|---|---|---|---|---|---|---|
| Spool | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Drum | – | ✓ | ✓ | ✓ | ✓ | ✓ |
Spool weight: 15 kg – 16 kg – 18 kgDrum weight: 250 kg – 300 kg – 450 kg
NOVOFIL SG3
MIG/MAG welding wire for mild steels

| C | Mn | Si | P | S | Ni | Cr | Mo | Cu | |
|---|---|---|---|---|---|---|---|---|---|
| min | 0.06 | 1.60 | 0.80 | – | – | – | – | – | – |
| max | 0.14 | 1.90 | 1.20 | 0.025 | 0.025 | 0.15 | 0.15 | 0.15 | 0.30 |
| Gas M21 | Gas C1 | |
|---|---|---|
| Yield strength Re | 510 MPa | 450 MPa |
| Tensile strength Rm | 580 MPa | 550 MPa |
| Elongation A5 | 26% | 26% |
| Impact test KV (−40 °C) | 70 J | – |
| Impact test KV (−30 °C) | 60 J | – |
| Impact test KV (−20 °C) | 100 J | 60 J |
| Impact test KV (+20 °C) | 140 J | 100 J |
Current type and polarity: DC (+)
| Diameter [mm] | Current [A] | Voltage [V] | |
|---|---|---|---|
| Short arc | 1.00 | 80–175 | 18–28 |
| Short arc | 1.20 | 120–200 | 18–30 |
| Short arc | 1.60 | 225–480 | 28–40 |