ECOspark 420 is a solid wire for mild steel with an engineered surface. It suits welding mild and low-alloy steels on welded structures, halls, frames, machine parts and repairs of structural steel.
It joins grades such as S235JR, S355JR, S235JO, S355JO, S235J2, S355J2 and S275N together with their equivalents, fed continuously under shielding gas from a semiautomatic torch.
- Classification EN ISO: 14341-A G 42 5 M21 3Si1 G 42 4 C1 3Si1
- AWS classification: A5.18 / SFA-5.18 ER70S-6
- Shielding gas: C1, M2, M3
- Diameters: 0.8 / 0.9 / 1.0 / 1.2 / 1.6 mm
- Approvals: TÜV (19669), DB (42.132.86), ABS, CWB, CE
On thicker parts and in a cold workshop plan preheating to cut the risk of cold cracking. Set the gas flow so the pool is covered over the whole length of the bead, and shield the station when you work in wind. Check the contact tip, a worn bore upsets the wire feed and causes burnback.
