Study on the Effect of SMAW Parameters on the Tensile Strength of Low Carbon Steel

MECHANICAL AND MANUFACTURING ENGINEERING

order to understand the effect of shield metal arc welding (SMAW) process parameters on the mechanical characteristics of low carbon steel, this work tries to, statistically, investigate the influence of some welding parameters namely the welding current and electrode type, on the tensile strength of Mild Steel. Specimens having dimensions of 200 mm× 50 mm× 4 mm, which were welded by shield metal arc welding (SMAW) with single V-Butt joint, were used for the burps of study. Three different types of electrodes, E6010, E6013 and E7018 and three levels of welding current 90A, 110A and 130A were set to carry out the experiment. The Design Expert® software was utilized to conduct the statistical analysis using the ANOVA test on the tensile strength of the welded joint area. The results showed that the selected welding variables had significant effects on the tensile strength of the specimens. According to the results, the strength of the joint area increased with increasing the welding current. The optimum tensile strength produced was 169.8 MPa when using welding electrode E7018 at 130A, while the lowest value was 80.9 MPa obtained when using electrode E6010 at current of 90A.

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