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.MUELLER Alloy 3771 (formerly MBCo. Alloy 211) is one of the most widely used and most easily forged of the copper-base forging alloys. It is most often used in multiple sequence hammer forging operations where a wide forging temperature range is desired. It is also a free-machining alloy. Typical uses include valve bodies, putters and hardware.