What consumable should be used for weathering steel?
Core Ten (A242 & A588) steels are weathering steels commonly used for outdoor structures. These steels have a higher resistance to atmospheric corrosion than typical mild steels. Often, welds on these steels are specified for similar corrosion resistance and color match.
On single pass welds, mild steel electrodes are commonly used. There is usually enough pickup from the base metal to obtain a good color match.
On multiple pass welds, low-alloy electrodes are commonly used to obtain a good color match and similar corrosion resistance. The electrodes commonly specified include those with the suffixes -C1, -C2, and -C3.