The Study of Mechanical Properties and Metallurgical for Steel Metal Welding between Q235 and AISI 304 by Gas Tungsten Arc Welding (GTAW)

Abstract

This study investigates the mechanical properties and metallurgical structure of welds on Q235 and AISI 304 steel plates with dimensions of 150 mm in width, 200 mm in length, and 6 mm in thickness. The welding was performed using the Gas Tungsten Arc Welding (GTAW) process. AWS A5.9: ER309L filler metal was utilized, and the welding was carried out using a RILON TIG 200S machine with the arc voltage of 120 V. The welding speed was maintained at 13.7 mm/min, and the shielding gas flow rate was set at 16 liters/min. Mechanical testing and metallurgical analysis were conducted to evaluate the quality of the welds. The experimental results indicated consistent penetration depth and effective fusion between the weld metal and the base metals. The average tensile strength of the welds was 467.85 MPa, and the average hardness was 345.86 HV. These findings demonstrate that the selected welding parameters and materials produced high-quality welds with satisfactory mechanical properties and metallurgical characteristics.