CARACTERIZAÇÃO MECÂNICA E MICROESTRURAL DOS AÇOS ASTM A-36 E AISI 304 SOLDADOS COM VARETAS ER-70S3 E ER-304L SEGUNDO AS NORMAS ASME IX EDIÇÃO 2023 E ASTM E7 DE 2022

Abstract

The study investigates the mechanical and microstructural properties of welded joints using ASTM A-36 (carbon steel) and AISI 304 (stainless steel) plates with a thickness of 6.35 mm, applying the TIG welding process with ER-70S3 and ER-308L rods, respectively. Tensile and bending tests, as well as microstructural analysis, were performed, demonstrating significant differences between the materials. AISI 304 showed better performance, breaking in the fused zone, while ASTM A-36 failed in the base metal. The microstructure of AISI 304, predominantly austenitic, and the presence of ferrite and pearlite in ASTM A-36 influenced the behavior of the joints. The choice between materials should consider factors such as strength, cost, and application environment, which are essential for industry.