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.CARPENTER PH 13-8 Mo is a martensitic precipitation-hardening stainless steel. It has high strength and hardness combined with good ductility and toughness in large sections. Compared to other ferrous alloys this material offers a high level of useful mechanical properties under severe environmental conditions. It is highly resistant to general corrosion and to stress-corrosion cracking.