Up to what sheet thickness can workpieces be welded? Max. Penetration depth

If the material thickness of the workpiece at the fracture point is greater than 1.0 mm, the penetration depth of the welding device is not sufficient. The fracture must then be specially prepared for welding: The edges are filed in a V-shape and only the remaining material, which is now in direct contact, is welded together. The resulting joint is gradually filled with Zulege material (welding wire).