Oerlikon Supranox 309MoL description: SUPRANOX 309MoL is a rutile coated MMA electrode for joining ferritic to austenitic steels, dissimilar joining and for stainless cladding. The weld metal microstructure consists of austenite with 15% delta-ferrite. Surfacing on unalloyed and low-alloy steels is already corrosion resistant in the first layer. Metal transfer is in fine droplets, good wetting of the joint faces, finely-rippled weld bead surface, easy slag removal with good striking and restriking. The
maximum operating temperature for joints between dissimilar steels is 300C, for higher temperatures or postweld heat treatments use SUPRANEL 600.