Squeeze casting is one of many casting methods are used to produce aluminum cast. It has been done by varying the pressure and temperature, in order to get a better mechanical properties and less porosity than other method. Pressure is the important factor in this process to obtain a good property. The aims of this research to develop squeeze casting method, and to know effect of low pressure in this process on mechanical properties and micro structure of aluminum A356 cast. Furthermore, this material will be used to fabricate aluminum matrix composites. This research was conducted with pressure respectively 2, 2.5, 3,3.5 and 4 MPa pouring temperature at 735 o C and molding temperature at 300 o C. Aluminum cast tested on tensile strength, Brinell hardness and micro structural test. The results are obtained, tensile strength and hardness linearly increase with the increase of squeeze casting pressure. The average of Maximum tensile strength is 192 MPa and 78 Brinell hardness number at 4 MPa of pressure. Micro structural test shows finer grains was obtained with the increasing of the casting pressure.
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