Bare, corrosion-resistant, "Super Duplex" rods for welding austenitic-ferritic stainless alloys of the 25% Cr, 7% Ni, 4% Mo, low C types. OK Autrod 2509 with its high intergranular-corrosion, pitting and stress-corrosion resistance is a crucial solution. The necessity of this alloy is evident in the pulp & paper industry, offshore and gas industry, where corrosion resistance is paramount.