Tag for bundles of metal products obtained from respective iron and steel processes, comprising: at least one plate-like structure made of a metal material, the plate-like structure having at least one reading surface adapted to support at least one identification code, preferably of the graphic and/or structural type such as for example a plurality of notches, slits and/or holes, relating to at least one piece of information or one datum pertaining to a respective bundle of metal products obtained from at least one iron and steel process, the plate-like structure having at least one through-opening with a ragged profile, the through-opening of the plate-like structure having a plurality of interference protrusions that extend radially towards the centre of the through-opening itself, defining a plurality of concavities positioned between the protrusions; at least one junction element that can be engaged to the plate-like structure so that they can be moved and rotated integrally, the junction element having a gripping portion projecting from the reading surface of the plate-like structure and adapted to be gripped by a gripping head of a robot or an automated mechanical arm, the gripping portion of the junction element having a substantially cylindrical configuration, having a profile, in cross-section, which is substantially circular, the gripping portion of the junction element having at least one circular groove or a circular relief for facilitating the gripping of the junction element by the gripping head of a robot or an automated mechanical arm, the junction element also having a fixing portion, opposite the gripping portion, protruding from a surface of the plate-like structure opposite the reading surface, wherein the junction element is inserted by interference into the through-opening of the plate-like structure on the side of the reading surface of the latter, the interference protrusion being bent on a side opposite the reading surface of the plate-like structure clamping the junction element in the through-opening so that the junction element and the plate-like structure remain joined, even during their movement, the fixing portion of the junction element being fixable to a respective bundle of metal products, preferably by means of at least one welding operation, in particular an electric-arc welding operation, the junction element comprising at least one abutment portion interposed between the gripping portion and the fixing portion, the abutment portion abutting against the reading surface of the plate-like structure when the junction element is engaged to the same. at least one plate-like structure made of a metal material, the plate-like structure having at least one reading surface adapted to support at least one identification code, preferably of the graphic and/or structural type such as for example a plurality of notches, slits and/or holes, relating to at least one piece of information or one datum pertaining to a respective bundle of metal products obtained from at least one iron and steel process, the plate-like structure having at least one through-opening with a ragged profile, the through-opening of the plate-like structure having a plurality of interference protrusions that extend radially towards the centre of the through-opening itself, defining a plurality of concavities positioned between the protrusions; at least one junction element that can be engaged to the plate-like structure so that they can be moved and rotated integrally, the junction element having a gripping portion projecting from the reading surface of the plate-like structure and adapted to be gripped by a gripping head of a robot or an automated mechanical arm, the gripping portion of the junction element having a substantially cylindrical configuration, having a profile, in cross-section, which is substantially circular, the gripping portion of the junction element having at least one circular groove or a circular relief for facilitating the gripping of the junction element by the gripping head of a robot or an automated mechanical arm, the junction element also having a fixing portion, opposite the gripping portion, protruding from a surface of the plate-like structure opposite the reading surface, wherein the junction element is inserted by interference into the through-opening of the plate-like structure on the side of the reading surface of the latter, the interference protrusion being bent on a side opposite the reading surface of the plate-like structure clamping the junction element in the through-opening so that the junction element and the plate-like structure remain joined, even during their movement, the fixing portion of the junction element being fixable to a respective bundle of metal products, preferably by means of at least one welding operation, in particular an electric-arc welding operation, the junction element comprising at least one abutment portion interposed between the gripping portion and the fixing portion, the abutment portion abutting against the reading surface of the plate-like structure when the junction element is engaged to the same.