Cored Wire / FLUX / Gasless Wire
– These wires consist of a thin metallic jacket that is filled with powder and layered with metal compounds and then rolled into a cylinder to shape the finished wire. At high temperatures, the FLUX wire creates an atmosphere with protective gas, which means that you do not need a gas cylinder or manometer for use. The cored wire is softer than the solid wire and behaves in a similar way to the aluminum wire when it is fed to the workpiece, which can mean less safety in feeding and possible crushing of the wire when it exits the drive. For cored wire, you will find special knurled wire feed rollers which have small teeth in the groove so that the wire is better gripped and thus a better feed is created, but over time the surface of the welding wire will slowly erode, which can lead to blockages in the wire guide A V-groove roller for cored wire can also be used, thanks to which one can avoid a blockage at the price of lower feed quality. Compared to solid wire, cored wire welding has the advantage that you do not need any accessories for gas, you can also do work outside, but there are also disadvantages because this method creates more spatter, the slag must be removed, and the quality of the seams is poorer than with inert gas welding. Shielding gas is not used for cored wire.