This study explored the influence of process parameters on the microstructure and mechanical properties of C1035 medium carbon steel weldments prepared using shielded metal arc-welding process. Electrode type (E6013) with gauges 10, 12, and 14 were utilized and the welding current varied in the range 77-211 A at constant welding voltage of 230V. Properties examined were ductility, ultimate tensile strength (UTS), and yield strength. The chemical constituents of the parent metal were analyzed using x-ray fluorescence and the microstructural evolution in the parent metal and weldment analyzed using optical microscope (OM). Results showed that at different electrode gauges, the ultimate tensile strength, yield strength, and percentage elongation of the weldment decreased with increasing welding current. Maximum ultimate tensile and yield strength of 497.801 MPa and 496.04 MPa respectively were obtained using electrode of gauge 14 E6013 (2.0 mm) at welding current of 77 A. This range of properties was guaranteed by the precipitation of widmanstatten ferrite at the transition area. Weldments produced using electrode of gauge 10 E6013 (3.25 mm) at welding current of 173 Amps showed better percentage elongation (7.33%) compared with other weldments, but lower than the parent metal. The results suggest that electrode diameter can influence the properties of steel weldment at different current supply.