Oerlikon Supranox RS 22 9 3 N description: SUPRANOX RS 22 9 3 N is a rutile coated MMA electrode particularly suitable for welding duplex stainless steels 22%Cr,9%Ni,3%Mo. High resistance to intergranular corrosion, pitting and stress corrosion conditions. Structural with Duplex for corrosion resistance as paper Industry, Tankers. WR 4462, URANUS 45N, UNS 31803. Good weldability with a spatter free arc, self-releasing slag combined with a very smooth bead appearance.