Oerlikon Basinox 309Nb description: BASINOX 309 Nb is a basic coated MMA electrode designed specifically for use where niobium stabilised weld metal is required in overlays, or inlays, on CMn or low alloy steels. Used for the welding of buffer layers on AISI 347 clad steels and dissimilar steels. The Nb content improves the resistance to intergranular corrosion and also the mechanical properties for high service temperature applications. Excellent weldability with a spatter free arc, self-releasing slag, combined with a very smooth bead appearance and BASINOX 309Nb is well-suited for positional welding.