This paper is the first to optimize the friction stir welding (FSW) process considering the
Clamp Pitch (mm) and Clamping Torque effect using the Various combinations of parameters
were constructed using factorial design and responses, resulting in a comprehensive factorial
analysis. Conspicuous changes in the tensile strength, yield strength, hardness, and power
profile were observed for all amalgamations of parameters. Significant parameters of the
FSW process have been considered in many optimization studies, however, the effect of the
Clamp Pitch (mm) and Clamping Torque (Nm) has been never studied. Three levels of three
parameters were used in the experiments: Clamp Pitch, tool rotational speed and Clamping
Torque. The full factorial analysis was performed, was applied as an approach for selecting the
values of the Significant factors of the parameters. For each result the three key parameters
were important with p-values of less than 0.05, suggesting their significance in the phase of
FSW. Mathematical models built with high R-sq. and least percentage error were adequate for
the investigated responses. The findings were gained by important parameter values factors of
30 mm, 1800 rpm and 70 Nm for the take into consideration parameter range for the Clamp
Pitch, rotational speed and Clamping Torque respectively