This study aims to analyze the effect of pressure variation in the stir-squeeze casting process on the hardness and microstructure of Aluminum Matrix Composites (AMCs) reinforced with 3% Palm Kernel Shell Ash (PKSA) and 1% Silicon Carbide (SiC). The matrix material used was 6063 aluminum alloy, with the addition of 1% magnesium (Mg) to enhance wettability between the matrix and the reinforcemen…