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.Frontier 40-E aluminum alloy is a high strength natural aging aluminum-zinc-magnesium-chromium-titanium alloy. It requires no heat treatment to develop high strength, has high shock resistance, exceptional corrosion resistance, high yield strength, excellent machinability, and pressure tightness.