ER70S-3 is intended for welding single-pass and multi-pass welds. This chemistry provides sufficient deoxidation to allow welding over light mill scall with both 100% CO2 as well as mixed shielding gases.
Copper coating protects the surface of the wire and the weld bead provides a slag free surface for easy post cleaning.
Less silicon and not as smooth
Typical base metal specifications are often the same as those for ER70S-2