ULTIMO-200 is a medium-carbon, chromium-molybdenum alloy steel capable of providing tensile strengths of over 200,000 psi in sections up to 4 inches diameter. It is recommended for heavy duty shafts, gears, rolls, bolts, etc. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-229. Producer or source: Atlas Steels Company.