P 51 is a basic-coated low hydrogen AC/DC electrode designed for welding
mild and higher strength steels. It combines strength and toughness and is
particularly suitable for heavily restrained sections where there can be risk of
cracking due to weld stresses. With its excellent general operability and good
positional welding characteristics P 51 is often used for pipe welding. It
operates without difficulties on both primer-treated and rusty material. The
electrode produces a finely rippled bead surface and smooth transition with the base material. This together with the exceptionally good slag detachability, even in root runs, gives P 51 superior radiographic quality.