Oerlikon Citoflux M20 description: CITOFLUX M20 is a metal cored wire containing nickel, for welding in all positions. Main applications: Off-shore fabrications, pipework, pressure vessels, shipbuilding (LPG tankers, ice breakers).CITOFLUX M 20 can be used for automatic multi-run welding. Diffusible hydrogen <3ml/100g of deposited weld metal.