Abstract: An organic foam pattern of the article to be cast is immersed in a dry sand mold containing no binder, the mold is filled with molten aluminum or aluminum alloy which replaces the foam and gradually solidifies, and an increasing isostatic gas pressure is simultaneously applied to the mold and to the aluminum or aluminum alloy after filling of the mold is complete. The isostatic gas pressure rises to a maximum value higher than 1.5 MPa and up to 10 MPa, and results in cast articles having improved mechanical characteristics and, in particular, better resistance to fatigue.