Estudo da viabilidade técnica da substituição do aço ASTM A572 pelo aço SAE 1020 com base nas propriedades mecânicas

Abstract

Due to its enormous variety of properties, abundance of raw materials used and a competitive production cost, ferrous alloys are the most used metal alloys in the world. Among them, steel stands out, which are iron-carbon alloys that may contain concentrations of alloying elements and/or treatments in order to favor their application to the intended purpose. Those produced in greater quantity and at a lower price are low-carbon steels, which contain less than 0.25% by weight of carbon, and among them the SAE 1020 steel stands out, widely used in civil construction. In addition to this, there are also microalloyed steels, which have more alloying elements added in specific concentrations in order to guarantee the necessary properties for their use, among which the ASTM A572 steel stands out, used, among others, in the production of profiles and sheets. Both steels mentioned have similar properties and, therefore, this study addressed, based on a bibliographic survey of books, articles and theses, the mechanical properties and chemical compositions of these steels in order to evaluate, based on these characteristics, the feasibility of replacement of ASTM A572 steel by SAE 1020 steel. According to the material analyzed, it was possible to observe that the mechanical properties of SAE 1020 and ASTM A572 steels are, on average, very close, but that, evaluating the SAE 1020 steels individually, for almost all cases, its use according to the ASTM A572 steel standard would not be possible.