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.EVANOHM* alloy R is an electrical resistance alloy with exceptional stability. Its resistivity increases during heat treatment and once obtained does not change significantly even when used at temperatures as high as 392 F (200 C). Resistors made with EVANOHM alloy R show a maximum drift of 5ppm per year over 15 years.