Understanding the difference between 40Cr and 40CrNi is key to achieving reliable performance in machined components. Both are widely used alloy steels, but their mechanical properties suit different working conditions.
40Cr is a general-purpose quenched and tempered steel with good machinability, moderate strength, and cost efficiency. It performs well for shafts, gears, bolts, and standard structural parts where load and impact are not extreme. It offers stable hardness and wear resistance for most daily industrial applications.
40CrNi, strengthened with nickel, delivers higher tensile strength, better toughness, and superior impact resistance. Its higher hardenability makes it ideal for heavy‑duty parts, large shafts, crankshafts, and components exposed to dynamic loads or low temperatures.
When cost and general performance matter, choose 40Cr. For heavy loads, high toughness, and long service life, 40CrNi is the better solution. With strict material control and precision CNC machining, we provide custom parts in both grades to meet your exact engineering needs.
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