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.TLS H13 PQ is an H13 type tool steel of premium quality. It meets the standards needed in the die casting industry by means of special melting techniques, thermomechanical processing, and care in annealing treatments.