21CrMOV is a low-alloy steel that belongs to the chromium (Cr)-molybdenum (Mo)-vanadium (V) series of materials, which is commonly used in the manufacture of mechanical parts and structural parts that work at high temperatures and pressures, such as bolts, fasteners, shafts and other load parts of power plant boilers, high-pressure vessels, steam turbines and petrochemical equipment. 21CRMOV alloy steel improves the strength, toughness, heat resistance and corrosion resistance of the material by adding chromium, molybdenum and vanadium elements.
High temperature intensity: 21CrMOV steel has good high-temperature strength and creep resistance, and can maintain good mechanical properties in high-temperature environments.
Good heat resistance: The addition of chromium and molybdenum significantly improves the heat resistance of the alloy, allowing it to withstand the effects of high temperatures for long periods of time without failing.
Excellent resistance to oxidation and corrosion: 21CrMOV steel has good oxidation resistance and corrosion resistance at high temperatures, especially strong resistance to hydrogen corrosion and sulfide corrosion.
Good toughness and weldabilityDespite its high strength, alloy steel retains good toughness and has good weldability, making it suitable for welding manufacturing complex structures.
The main application areas of 21CrMOV alloy steel include:
Power industry: High-temperature bolts and fasteners used in the manufacture of power plant boilers, as well as other components subjected to high temperatures and pressures.
Petrochemical equipmentIn the petrochemical industry, it is used in the manufacture of key components for reactors, heat exchangers and piping systems.
Mechanical engineering: Suitable for the production of high-performance shafts, gears, fasteners and other mechanical components that are subjected to heavy loads.
Heat treatment: The performance optimization of 21CrMOV steel relies on the right heat treatment process, including quenching and tempering, to achieve the desired hardness and mechanical properties.
WeldingSpecial measures such as preheating and post-welding heat treatment are required during the welding process to prevent cracks and ensure the quality of welded joints.
Due to the special properties and application requirements of 21CrMov alloy steel, its production and processing need to follow strict process standards. When designing and using the structure of this material, it is recommended to consult professional materials and engineers to ensure a safe and reliable application.