Effect of Welding Positions on The Mechanical Properties of Manual Metal Arc Welding

Abstract

In mechanical engineering and product design, welding is an essential technique that combines various parts and structures. One of the most challenging welding positions and a requirement for welder certification is the 6G position. The main objective of this investigation is to determine the mechanical properties of six low-carbon steel pipe butt joints in the 6G welding position at different locations after being welded using manual metal arc welding (MMA). At the six, twelve, three, and nine o'clock positions on each welded pipe intersection, samples were taken for tensile strength and hardness and tested. After all the data has been obtained and categorised into four groups, the SPSS ANOVA test was performed to determine if there are any significant differences. The findings reveal a minor difference in most of the dates collected for either tensile or hardness, with the exception of location three's tensile data, which is slightly lower than the other data groups. Low-heat input welded joints have high tensile strength; high-heat input joints have a relatively low tensile strength due to uncomfortable posture and difficulty maneuvering, which slows down movement.