FAGERSTA FB-52 is a moderately alloyed high-speed tool steel (hardware grade) designed to provide a desirable combination of economy and good mechanical properties. It is especially well suited for twist drills and similar cutting tools. Among its many other uses are gear cutters, punches and wood-working tools. This datasheet provides information on composition and hardness. It also includes information on forming, heat treating, machining, and surface treatment. Filing Code: TS-324. Producer or source: Fagersta Steels Inc..