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.AISI 5135 is a low-alloy, through-hardening steel containing nominally 0.95% chromium. It is recommended for applications where medium hardenability, moderate strength and low-to-moderate toughness are sufficient. It may be used in the unhardened (annealed, as-rolled, or normalized) condition or after quenching in oil followed by tempering.