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Marathon 543 is a special agglomerated fluoride-basic welding flux with high basicity suitable for multi-run welding of high creep-resistant 9%Cr-steels like grade P91/T91, 1.4903 - X10CrMoVNb9-1, grade P92/T92, NF616 and 1.4905 - X11CrMoWVNb9-1-1. The metallurgical behavior concerning Si and Mn is neutral. The flux produces well-contoured and smooth welding beads with good slag release as well as appropriate weld metal ductility and impact behavior after tempering. Marathon 543 is a hydrogen-controlled welding flux with low diffusible hydrogen content.
