Oerlikon Fluxodur A2-O description: FLUXODUR A2-O is a self-shielded flux cored wire producing a 18%CR, 8%Ni, 6%Mn deposit. The weld beads produced have a self-releasing slag covering that leaves a clean surface. FLUXODUR A2-O is used for repair jobs where high strength and toughness combined with workhardening are required, joining austenitic manganese steels with them or with other steels, joining 14% manganese steels.