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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.

SAE 4147 is a medium-carbon low-alloy steel with relatively high hardenability and good resistance to abrasion, fatigue and impact. It is recommended for moderately severe service. Although nominally an oil-hardening grade, SAE 4147 may be water hardened if suitable precautions are taken to minimize the danger of cracking during quenching. It has a relatively low tendency for the development of temper embrittlement during tempering in the range 850-1100 F. Typical applications comprise gears, shafting, machine-tool parts, clutch parts and connecting rods.