View Sample Alloy Digest Data Sheet (PDF)Since 1952, Alloy Digest has been the leading reference for materials property data on metals and alloys used throughout the world. Featuring graphs, charts and tables, these sheets give facts and figures on composition or characterization, physical and mechanical properties, heat treatment, and machinability.BELMONT ALLOY 18912 is an aluminum casting alloy containing 0.8% magnesium and relatively high copper and nickel along with its 6.5% tin. The composition makes the alloy suitable for bearing applications requiring operation at relatively high temperatures and with good resistance to thermal stresses. Sand and permanent-mold castings comprise its main use. It is particularly well suited for shock or impact loads.