Oerlikon Citoflux R620 Ni2 description: CITOFLUX R620 Ni2 is T 62 5 Mn2.5Ni P M 1 H5 / E101T1-GM-H4 folded type MAG rutile flux cored wire, depositing C-1.35Mn2.2Ni weld metal. Suitable for welding with mixed gas. The use with CO2 is possible. CITOFLUX R620 Ni2 is the new name of the former CITOFLUX R26 is designed for welding of high-strength fine grain structural steels with minimum yield strength of 620 MPa. Main features are low spatter with easy slag removal and regular bead appearance.