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The maintenance and manufacture of Chassis have been used of more noble materials in the welding applied to the most critical points. In this sense, this study presents the results of some researches developed with ASTM A182 F22 structural steel (a low alloyed steel) by the AWS ER 80S-G Wire. For the buttery, the double layer technique was used with "Higuchi" and "modified Higuchi " tests and the application of "decision diagrams" to refine the parameters to be used. In order to verify the efficiency of the mentioned techniques of fabrication, microhardness tests were carried out, the presence of carbides formed at the interface between the filling and buttery was observed, these responsible for microhardness alterations were also observed the presence of undesired structures such as Martensite in the analyzed ZACs. The welding process used was the GMAW with gas Ar2% O2.

The current Brazilian technological scenario undergoes major transformations, the automobile industry is part of this panorama, where new technologies are presented and the other improved, in this segment we have non-ferrous aluminum alloys, which with the addition of alloys transform into alloys of high performance. Elements of aluminum alloys undergo modifications in their mechanical properties with variation of temperatures, deformation, chemical composition among others. The present work aims at comparing the thermomechanical properties of the experimental results and computational simulations of Al-0.05% Cu- [0.35-0.45] % Fe-0.22% Zr alloy for application in the automotive industry. The alloy was obtained from Al-EC modified by iron insertions in the range of [0.35 - 0.45] % and 0.22% Zr.