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SUPRANOX 309L is a rutile coated MMA electrode for joining dissimilar steels, austenitic steels to ferritic steels, and for stainless cladding. The weld metal microstructure is austenite with ~15 % delta-ferrite.
Cladding on unalloyed and low-alloy steels is 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 dissimilar joints is 300 °C, for higher temperatures or postweld heat treatments use SUPRANEL 600.
EN 1600: E 23 12 L R 1 2
AWS A5.4: E 309L-17
Stainless and Heat resistant steels