Chromium-nickel molybdenum alloy steel, commonly called Cr-Ni-Mo steel, is a alloy steel used in the production of components that require high levels of strength, such as shafts, gears, screws and nuts. Cr-Ni-Mo steel is typically composed of around 80% iron, 17% chromium (Cr), 6-7% nickel (Ni) and 1-2% molybdenum (Mo). Because of its composition, the steel has superior strength, toughness, resistance to wear and fatigue, and good weldability, making it an excellent material for components subject to heavy usage and harsh conditions.
20CrNiMo steel is a low-alloy Cr-Ni-Mo steel developed for use in high temperature environments. It contains 20% chromium (Cr), 8-10% nickel (Ni) and 1-2% molybdenum (Mo). 20CrNiMo steel has good cold workability and can be hardened to enhance its strength and toughness. Common applications of 20CrNiMo steel includes turbine blades, shafts, crankshafts, rollers, gears and machine components.
40CrNiMo steel is an improved version of 20CrNiMo steel that is used for critical components such as turbine blades, cam followers and processor belts with extreme temperature requirements. 40CrNiMo steel has higher levels of chromium and nickel content, while having lower levels of molybdenum than its predecessor. Compared to 20CrNiMo steel, the 40CrNiMo steel offers superior mechanical properties, including enhanced yield strength and higher levels of corrosion resistance. Additionally, it offers good cold workability and can be machined and hardened to further enhance its strength and toughness.
To ensure the highest levels of quality and performance, 20CrNiMo and 40CrNiMo steel is typically produced through a combination of processes including forging, hot rolling, and heat treatments. Particular care must be taken during forging to control the grain size in order to achieve the desired mechanical properties. The final product will usually be tested for hardness, tensile strength, and toughness before being approved for use.
Cr-Ni-Mo steel has a wide range of applications, from the manufacture of components in the aerospace and automotive industries, to the production of medical implants and tools used in surgical procedures. This type of steel is highly versatile, offering superior strength and durability in extreme temperature and high stress environments. As a result, Cr-Ni-Mo steel is increasingly being used for components that require the highest levels of performance and reliability.
