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.Jalloy-AR is the trade name of a group of constructional steels which boost working limits for abrasive resistance at high yield-strength levels. This series is produced in two sets of hardness values, namely, Jalloy-AR-360 with a hardness rating of 340-380 Brinell and Jalloy-AR-400 with a minimum hardness rating of 400 Brinell.