Abstract
With particular emphasis on thin plates, a series of fundamental test welding by MIG method were performed on some grades of alminum alloys (anti-corrosive) for rolling stock. The test materials included 2S-O, 3S-O, 52S-O, 61S-O plates of respectively 5, 3, and 2mm. thickness, with electrode wires, 2S and 43S ; and no preparation closed butt welding was conducted on them. The results pointed to a good possivility of Aircomatic method beeing applied satisfactorily to such thin plates as 3 or 2mm., though the thickness of plate adequate for this method has been accepted as over 4mm. The welding conditions were as given in Table 2. Table 8 summarises the results of the tensile test, bending test, hardness measurement and microscopic observation with 52S and 61S. The electrode wire 43S, wich is in general use, should be used with caution as a structural material, for its deposit metal lacks very much in ductility.
