Introduction
20MnVBH steel is an alloy of high strength and low alloy structural steel produced by Hebei Jingye Steel Company. It is mainly used in bridges, ships, automobiles and other structural parts that require superior toughness, good weldability and cold forming properties. In addition, it can also be used in a variety of special steel components and components for nuclear power plants, such as the inner casing of the reactor core and the pressurized fuel assemblies.
Uses
One of the major uses of 20MnVBH steel is in the construction of bridges. Its excellent yield and tensile strength, as well as its good toughness and weldability, make it an ideal choice for bridge structures. The material’s superior toughness and weldability also make it an excellent choice for shipbuilding, as it can easily be welded into complex shapes, even when adjusting for temperature differences or structural irregularities.
20MnVBH steel has also proven indispensable in the automotive industry, where its superior toughness and ability to withstand higher temperatures and pressure are key characteristics. This superior strength to weight ratio allows 20MnVBH steel to be used to create lighter and more efficient cars, with increased safety and performance characteristics.
Furthermore, 20MnVBH steel has unique properties that make it useful in the manufacture of nuclear power plant components. Its superior toughness and weldability allow it to be used in the manufacture of reactor core inner casings and pressurized fuel assemblies, while its good cold formability makes it ideal for complex shapes and parts.
Processing
20MnVBH steel has superior machinability, allowing for speed and accuracy during the manufacturing process. However, it requires special cutting tools because of its higher iron content and harder characteristics. To prevent cracking or tearing, blades and tool tips should be made of high-speed steel, and maintained at higher speeds for smoother finishes.
20MnVBH also requires special welding techniques to minimize microstructure segregation. As it is sensitive to variations in temperature, the welding equipment should be carefully monitored so that it does not exceed the temperature limits for the material. It also has superior ductility and toughness, making it well suited for cold forming processes, provided that proper lubricants are used.
Conclusion
20MnVBH steel is a versatile and high-strength alloy steel available in both plate and tube forms. It can be used in the construction of bridges, ships, cars, and nuclear power plants. It has superior machinability and weldability, as well as high toughness and formability. Special tools and welding techniques must be used to ensure that the material is properly machined and welded.
