Six-Sigma is the one of the most sturdy management tool used to realize process privilege. Six-Sigma is a problem-solving methodology that decreases cost and refinement customer goodwill and very decreases waste in all the process implicated creation and delivery of the product and service. Six-Sigma process embraces collection of datum, measurement, and statistics to find out the different types of factors and parameter. This work focuses experimental surveillance on providing a clear connotation of an aluminum pipe welding by using (define, measure, analysis, improve, control) technology under Six-Sigma in order to increase tensile strength and hardness (decrease leakage)problem in aluminum pipe welding. By taking various pipe welding parameter in a machining process the pipe welding strength and hardness increased.