Bohler CN 23/12-UP description: SAW wire/flux combination of type S 23 12 L / ER309L. This is a standard alloy for welding dissimilar joints, steels with poor weldability and weld surfacing. SAW wire/flux-combination for multi-pass welding, smooth beads, low hydrogen contents, easy slag removal without any slag residues and good welding characteristics even for fillet welds are very much appreciated by users. The average ferrite content is 16 FN. Suitable up to service temperatures of +300°C.