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This study analyzes the effect of the process parameters such current, voltage, gas-flow rate and weld speed on a 10mm thick mild steel plate for minimum reinforcement height using the tungsten arc welding process. With the use of design expert, response surface methodology was applied in constructing a design matrix, analyzing the data and obtaining a mathematical model. The minimised weld reinforcement of 0.016mm was observed at a weld current setting of (200amp), voltage (18volt), gas flowdoi:10.4314/jasem.v22i8.31 fatcat:nvnz7dfth5dr3peky2ilfwfckq