Aluminum welding wire creates stronger welds than standard welding wire for aluminum. It is for used aluminum 4043, 5050, 5052, 5083, 5454, 5456, 5457 and 5458 marine grade aluminum.   ER4043 Welding Wire ER4043 MIG welding wire has a higher tensile strength than ER5356 MIG welding wire. It is most commonly used for welding 6000 series aluminum alloys and is …