The motivation for the present work is based on changing the sand molds to produce advantage of sound castings and mechanical properties of A356 aluminum alloy, thereby promotion cost. Before such a change is implemented in a mass-production A356 casting, its influence on the Mechanical Properties of the materials must be thoroughly investigated and understood. Moisture in the green sand mold and CO{sub}2 sand mold produce more pore in the A356 casting than in Furan sand mold. Furan sand mold has higher density for mass of unit volume. React hydrogen of moisture absorbs by A356 casting to form more pores during solidification. Reducing density of A356 casting affect on hardness, U.T.S., and impact of mechanical properties. Castings by Furan sand mold has superior mechanical properties from observation of experimental data.
Atmosphere Mechanical properties