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.Hidurax 7 is a nickel and silicon hardened bronze grade with tensile properties slightly lower than Hidurax 1 (see Alloy Digest Cu-740). The alloy has high impact properties and low magnetic permeability.