Oerlikon Citoflux R550 description: CITOFLUX R550 is rutile cored wire for the welding of high-strength fine grain structural steels with minimum yield strength of 550 MPa. Very good slag removal, smooth seam surface without undercutting into the base metal. Can be used in manual and fully-mechanised processes for example with orbital or vertical guiding device. Can be welded in all positions with one setting of parameters! Used under mixed gas as shielding gas only.