Abstract: Background: The purpose of this study was to analyze the hardness of the castings made of Aluminum Alloy (AA) 6061 mixed with wood charcoal powder and coconut shell charcoal powder. AA 6061 is an aluminum alloy with elements of Magnesium and Silicon that is widely used in automotive and construction equipment, this aluminum alloy has beneficial properties such as corrosion resistance, light weight and malleability. Materials and Methods: Wood charcoal powder is wood charcoal that is crushed into a fine powder. Wood charcoal is obtained from the carbonization process of wood by burning with limited oxygen. Meanwhile, coconut shell charcoal powder is charcoal powder made from burned coconut shells and also undergoes a carbonization process. Smelting is done with the material in the form of pieces of AA6061 which is melted in a crucible until it melts, where the melting temperature is an average of 700oC......
Key Word: AA6061, Wood Charcoal, Coconut Shell Charcoal, Hardness.
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