20CrMo is a low alloy steel whose chemical composition mainly includes carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr) and molybdenum (Mo). The following are specific chemical composition standards:
Carbon (C): 0.17~0.24%
Silicon (Si): 0.17~0.37%
Manganese (Mn): 0.40~0.70%
Phosphorus (P): ≤0.035%
Sulfur (S): ≤0.035%
Chromium (Cr): 0.80~1.10%
Molybdenum (Mo): 0.15~0.25%
Among them, carbon and silicon are elements that adjust the strength and toughness of steel. Manganese can improve the strength and toughness of steel. Phosphorus and sulfur are impurity elements that will affect the toughness and plasticity of steel, so they need to be controlled within a certain range. Chromium is an element that enhances steel's corrosion resistance and hardness, and molybdenum increases steel's strength and heat resistance. These elements exist in a certain proportion in steel and can adjust the strength and toughness of steel, giving it excellent mechanical properties.
The chemical composition of 20CrMo steel complies with international standards and is suitable for manufacturing mechanical parts, bearings, gears, hubs, etc. In addition, its mechanical properties are also quite excellent, with tensile strength (MPa) ≥ 885, yield strength (MPa) ≥ 635, elongation (%) ≥ 12, and impact toughness (J) ≥ 78.
20CrMo steel is a high-quality low-carbon medium alloy structural steel with high strength, high toughness, good hardenability, no temper brittleness, cold strain plasticity, machinability and weldability. This kind of steel is listed as a recommended standard grade in major industrial countries in the world. It has low alloying element content and has a good synergistic effect of various alloying elements. Therefore, it is widely used in many fields:
Machinery manufacturing: 20CrMo steel is used to manufacture high-pressure pipes and various fasteners, such as oil drill bits, pipeline connectors, oil well casings, chemical reactors and other equipment components. At the same time, it can also manufacture forging dies, such as hammer heads, modules and press working parts, etc.
Automobile manufacturing: This material is used in the field of automobile manufacturing to manufacture gears, shafts, chassis, engine components, and body structures of transmission systems. Its high strength and excellent fatigue resistance not only improve the load-bearing capacity and safety of the car, but also provide the possibility for lightweighting the car.
Railway transportation: 20CrMo steel is also commonly used in the manufacture of railway transportation equipment and components, such as rail connectors, wheels, axles and car body structures.
Petrochemical field: Due to its good corrosion resistance and welding performance, 20CrMo steel is also widely used in manufacturing storage tanks, pipelines, reactors and other equipment. It can withstand the erosion of various complex environments and chemical media, ensuring petrochemical production security and stability.
Shipbuilding and marine engineering fields: This material is also widely used in ship manufacturing and offshore platform construction. Its excellent corrosion resistance and high strength can ensure long-term stable operation of ships and marine facilities in complex environments and extreme conditions.
Electric power and bridge construction fields: In addition, 20CrMo steel is also used to manufacture high-pressure boilers, steam turbine components, and bridge structural parts.
In general, 20CrMo steel is widely used in various fields that require high strength, high toughness and good corrosion resistance due to its excellent physical and chemical properties.