22MnVBHA guaranteed hardenability structural steel

Introduction

22MnVBHA is a special structural steel with low carbon content, which is first produced in China. The steel has unique properties, good toughness and hardness, good wear resistance and fatigue strength, etc. It has a very important role in the development of modern industrial technology. The steel has a good property in normal air quenching and tempering, which can greatly improve the comprehensive properties of the steel and ensure its high-temperature strength, good plasticity and low-temperature toughness. Meanwhile, it can ensure a good performance of the piece after being processed, so it is widely used in various industries.

Chemical Composition

22MnVBHA steel contains 0.15-0.22% of carbon, 1-1.3% of silicon, 0.25-0.50% of manganese, 0.4-0.7% of chromium, 0.15- 0.30% of tungsten, 0.12- 0.20% of vanadium, and 0.035- 0.050% of boron.

Physical Properties

22MnVBHA steel has a tensile strength of 285MPa-440MPa, an elongation of 15%-20%, a yield strength of 205MPa-360MPa, and a ratio of reduction of area of 40%-50%. Additionally, it has a hardness of the delivery state of 155- 201 HB, a hardness after quenching of 254-232 HB, and a hardness after tempering of 150-208HB.

Processing

Generally, the normalizing and quenching are used for the processing of 22MnVBHA steel, which will make it more homogeneous. This can ensure that the steel has a more uniform microstructure and a better combination of plasticity and toughness. The heating temperature during normalizing should be 900-950 °C, which should be heated for 30 minutes for each 20 mm thickness of the material, and then cooled in air.

The quenching should be carried out after the cooling from normalizing. It is preferred to quench in saltwater or brine at a rate of 6- 8 °C/s. The tempering should be done at temperature of 520- 570°C, and for every 20mm thickness of the steel should be heated for 30 minutes.

Applications

The steel has good toughness and wear resistance, so it is widely used in various industries. It is often used to manufacture tools and parts that need to bear large impact loads and friction wear, such as excavator parts, mining machinery parts, drilling machinery, construction machinery parts and agricultural machinery parts, etc.

Conclusion

22MnVBHA is a special structural steel, which offers very good toughness and wear resistance. It has a high-temperature strength, a good plasticity and a low-temperature toughness and can ensure a good performance after processing. In addition, it is widely used in various industries, such as excavator parts, mining machinery parts, drilling machinery, construction machinery parts and agricultural machinery parts, etc.

22MnVBHA is a quenched and tempered structural steel with excellent strength and wear resistance properties. The 0.22% carbon, 0.90% manganese, and 0.035% boron composition provides excellent machinability and improves the toughness of the steel.

The most characteristic feature of 22MnVBHA steel is its hardness. The steel has a Quench Hardening Index (QHI) of less than 500, making it extremely tough. This is due to the combination of carbon and manganese content in the material, which imparts excellent resistance to abrasion and wear.

In addition to its high hardness, 22MnVBHA offers excellent weldability. The addition of boron enables the steel to be welded without the formation of brittle zones. The welds made using 22MnVBHA are highly resistant to cracking, even at very high temperatures.

Another beneficial feature of the steel is its strength. 22MnVBHA has an ultimate tensile strength of 930 MPa and a yield strength of 700 MPa. This strength makes it suitable for use in components that need to withstand dynamic loads and high impact forces. For example, it is suitable for use in construction of bridges and other structures that are subject to heavy dynamic loads.

The excellent wear resistance, tough strength, and improved weldability of 22MnVBHA make it well-suited for a variety of applications, such as in the automotive, mining and construction industries. 22MnVBHA is also used for components requiring good toughness, such as agricultural and forestry equipment, as well as tools for extreme conditions. It is an excellent choice for parts subject to high stresses and vibration.

Overall, 22MnVBHA is an excellent choice for components that require high strength and excellent wear resistance. Its combination of carbon and manganese content makes it both tough and weldable, while its boron content adds additional strength and improved weldability. The steel is ideal for applications in the automotive, mining and construction industries, as well as in forestry, agricultural and extreme environment applications.