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 18910 is a general-purpose aluminum casting alloy containing 2.5% silicon which contributes to good casting characteristics for intricate shapes. Sand and permanent-mold castings comprise its main use. It is used widely for bearings and components of intricate shape. Because of its anti-scuffing properties, low friction and high resistance to wear under conditions of boundary and thin-film lubrication, it is used extensively for large rolling mill bearings.