1 Introduction
20MoCr3 is a chromium-molybdenum-vanadium alloy used in a number of industries, such as aerospace, automotive, power generation and heavy duty machine shops. It is a highly resilient material which is resistant to corrosion, wear and high temperatures, making it suitable for a wide range of applications.
2 Chemical composition
20MoCr3 is composed of 20% chromium, 1.5% molybdenum, 0.07% vanadium, 0.15% tungsten, 0.04-0.07% nitrogen and 0.37-0.44% sulfur. This gives the alloy a high resistance to oxidation and a good combination of strength and toughness.
3 Applications
20MoCr3 is often used for a variety of mechanical applications, particularly in industries dealing with oil and gas exploration. Its excellent strength and corrosion resistance make it a popular material for valves, rings, gaskets, seals, pistons and pump shafts used in this field.
For high temperature applications, 20MoCr3 can withstand temperatures up to 1200°F (649°C). This makes it an ideal material for applications in engines, turbines, oil and gas lines and gas compressors.
In addition, 20MoCr3 is widely used for a variety of fasteners and machined parts, due to its excellent strength and toughness. It is often used for gears, couplings, bearings, pipes and other components.
4 Heat treatment
20MoCr3 is typically annealed and tempered to obtain the desired mechanical properties. Annealing will soften the material and allow it to be machined, while tempering will provide increased strength and wear resistance. It is important to note that this alloy can be susceptible to cracking if the incorrect heat treatment is used.
5 Advantages of 20MoCr3
20MoCr3 has a number of advantages, including:
Excellent corrosion resistance: The chromium content of this alloy helps it to resist corrosion in a variety of environments.
High strength and durability: The molybdenum and vanadium content give the alloy a high strength and it is also wear resistant.
Excellent resistance to oxidation and high temperatures: 20MoCr3 is resistant to oxidation and can withstand temperatures up to 1200°F (649°C).
Excellent machinability: This alloy can be easily machined and is a popular choice for fasteners and machined parts.
6 Disadvantages of 20MoCr3
Despite its many benefits, 20MoCr3 does have a few drawbacks. It is prone to cracking if the wrong heat treatment is used and it is relatively expensive compared to other alloys.
7 Conclusion
Overall, 20MoCr3 is an excellent choice for a variety of applications due to its excellent strength, wear and oxidation resistance, and its high temperature tolerance. This alloy is widely used in the oil and gas exploration industry and for a variety of machined components and fasteners. Its major disadvantage is the cost, but its other benefits outweigh this drawback.
