Bohler NICU 1-IG description: NiCu-alloyed copper coated GMAW wire, for welding of weathering resistant constructional steels, standard constructional steels and special constructional steels. NiCu 1-IG wire features good weldability in the short arc mode at low voltage and in the spray arc process with high voltage. The mechanical properties of the weld deposit, the freedom of porosity and the bead appearance depend on the type of shielding gas used and on the other welding parameters.