Oerlikon Citoflux R620 description: CITOFLUX R620 is a rutile flux cored wire with excellent all-positional weldability. Suitable for welding of high-strength fine grain structural steels with minimum yield strength of 620 MPa. Low spatter with easy slag removal and regular bead appearance. Ideal for offshore and naval shipyard applications. Adapted for high heat input procedures. Exceptional weldability in particular for pipe welding in vertical up position.