Many researchers have shown that by adding the powder in SAW, a better use of heat can be made; thus, for a given heat input, the number of passes required to fill a joint can be reduced and, therefore, the total energy supplied to the joint can be reduced. Alternatively, the same bed size or deposition rate can be achieved by lower heat input per pass. Welds made with lower heat input experience higher cooling rates, and thermal gradients are steeper, hence, the width of the HAZ is also less. Additionally, the time spent above the peak temperature is reduced; the combined effect of this results in a narrow HAZ that cools faster and has smaller grain growth. Weld metals produced under faster cooling rates are also superior in mechanical properties. Thus, the process of powder addition has potential not only for producing welds that are cost effective but metallurgic ally superior, too, and they may become attractive for welding HSLA and HY steels. In light of this, a study was carried out to evaluate the effect of the addition of metal powder on the mechanical properties of SAW metal made in plain carbon steel.