Abstract: In this study, an effect of welding parameters on the weld ability of mild steel specimen having dimensions 80mm x 50mm x 6 mm, which is welded by Metal arc welding, butt joint, is investigated. The current and voltage are considered as welding parameters. The effect of welding parameters is investigated on depth of penetration and Heat input which are considered as output parameters of welding.

Keywords: Mild steel, Arc welding, Welding current, welding voltage, Welding speed, Depth of penetration, Heat input.