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A method for recycling aluminium alloy chips by hot extrusion was studied as well as the possibility of using to recycle aluminium chips. As a result, according to an ANOVA analysis, preheat temperature is the most significant factor influencing the response variables investigated. Preheat temperature and the quadratic effect of factor preheat temperature provided a primary contribution to the responses investigated. Additionally, factor preheat time did not provide a significant contributing factor to the Ultimate Tensile Strenght. This developed the Response Surface Methodology (RSM) model for ER12, which can now be used for analysis and predicting the Ultimate Tensile Strenght for recycling aluminium chip using the hot extrusion process. The Miscellaneous Design and Response Surface Methodology enabled the determination of optimal operating conditions for obtaining hot extrusion production. The optimization of the analyzed responses demonstrated that the best results for hot extrusion process parameter. It reveals the empirical models developed were reasonably accurate, particularly for UTS at 550°C temperature and 3 hours preheating time. All the actual values for the confirmation run are within the 95% prediction interval. Key-word: Recycling Aluminium, Hot Extrusion, Response Surface Methodology, Optimization

Development of Lab Test Mode to Estimate Performance Drop of Brake Pads Base on Circuit Test Results