The increasing demand for higher performance of steel weldment in stringent service applications has prompted careful selection of welding consumables and current, for the welding of metal. This paper therefore, investigated the effect of welding consumables on the mechanical properties of microalloyed steel weldment by employing shielded metal arcwelding process. Weld beads were deposited with E7016, E7018 and E7024 electrodes using preset current of 90, 94, 98, 102 and 106 ampere respectively. Thereafter, the welded specimens were machined to the required dimensions for hardness, impact and tensile strength tests. A standard metallographic technique was applied to examine the microstructure formed across the steel weldments. The results showed that for each electrode type, the hardness, yield strength, and tensile strength decreased with increasing welding current but the impact strength and percent elongation increased correspondingly.
Keywords : Micro-Alloyed Steel, Current, Electrode, Microstructure, Mechanical Properties.