K. E. 839 is a chromium, high-carbon tool steel recommended for bearings, shear blades, taps, gauges, swaging dies and other tool applications requiring good abrasions resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on heat treating and machining. Filing Code: TS-212. Producer or source: Kayser, Ellison & Company Ltd.