Oerlikon Fluxocord 40C description: FLUXOCORD 40C is a seamless copper coated basic flux cored wire for submerged arc welding on fine-grain structural steels. Weld metal with OERLIKON flux OP 121TT has a special composition with 0,1%C - 1,3%Mn - 0,9%Ni, resulting in excellent mechanical properties in as welded, stress relieved and normalised condition as well. FLUXOCORD 40C is used in combination with OP 121TT or OP 121TTW.