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.ARMCO 17-7 PH* is a precipitation-hardening stainless steel that provides high strength and hardness, excellent fatigue strength, good corrosion resistance and minimum distortion on heat treatment. It is easily formed in the annealed condition, then hardens to high strength levels by simple heat treatment.