G20CrMoA (carburized) bearing steel

G20CrMoA Bearing Steel

G20CrMoA bearing steel, also known as semi-seamless bearing steel, is a kind of steel used in the manufacture of bearing rings and rolling elements. Bearing steel is usually used in combination with other metals, such as bronze, brass or stainless steel, to create a bearing structure of superior strength and endurance. Bearing steel is known for its high strength and wear resistance, properties which make it essential in applications involving the transmission of high loads and speeds, such as automotive and mechanical engineering.

G20CrMoA bearing steel is a low-alloy steel grade with enhanced wear resistance and fatigue strength when compared to other steels. G20CrMoA is composed mainly of 0.25-0.35% carbon and 0.80-1.20% chromium, along with smaller amounts of other metals such as vanadium, molybdenum and silicon. Due to the high chromium content, G20CrMoA steel has exceptional resistance to surface corrosion and wear.

G20CrMoA bearing steel is produced in a number of shapes and sizes in order to meet the specific requirements of the application and maintain a balance between strength and cylindrical tolerance. The steel is available in both hot and cold finished forms, with cold finished the most preferred type for applications where the highest level of accuracy and tolerance is desired.

G20CrMoA bearing steel is used extensively in industries such as automotive, aerospace, power generation, railway and engineering where high performance and reliability are essential. In automotive applications, G20CrMoA bearing steel is mainly used in the manufacture of engine components, transmission systems and differential gears. Furthermore, it is commonly used for the production of running gears, springs and other components in the railway and power engineering sectors.

Due to its low-alloy composition and enhanced wear resistance compared to other steel grades, G20CrMoA bearing steel provides a longer working life as well as quieter and smoother operation. Furthermore, due to its excellent machinability and high fatigue strength, G20CrMoA is widely preferred in applications that require precision machining and a high tolerance finish.

In order to maintain the highest levels of performance, G20CrMoA bearing steel needs to be carefully applied. Improper heat treatment and improper grinding of the steel can result in higher levels of early failure under load. In addition, if the steel is not lubricated appropriately, premature wear and tear can be expected.

In conclusion, G20CrMoA bearing steel is a versatile and reliable material that is suitable for a wide variety of industrial applications due to its high strength and wear resistance. Moreover, G20CrMoA bearing steel is easy to work with and offers longer life cycles, reduced maintenance costs and improved levels of performance.

G20CrMoA is a kind of bearing steel. It belongs to medium carbon, chromium-molybdenum type steel. It has the characteristics of good hardenability and good machinability, which is suitable for the manufacture of medium and large size bearing components with medium and high speed or low temperature.

The performance index of G20CrMoA bearing steel is that its maximum hardness after quenching reaches 56HRC, and the comprehensive performance indexes such as mechanical properties and fatigue properties have returned to corresponding levels. Compared with other bearing steels, the material cost of G20CrMoA is obviously reduced, and the relative performance and cost can be better balanced.

G20CrMoA bearing steel carbon content is 0.18-0.23%, and the content of chromium is 1.30-1.60%. After quenching, its mechanical properties meet the requirements, that is, the yield strength Re is more than or equal to 725MPa, the tensile strength Rm is 805-925MPa, the elongation A50 is 12%-15%.

G20CrMoA bearing steel has good spheroidizing effect after heat treatment and good surface quality, which can reduce the cutting force, reduce the cutting heat, reduce the friction between the tool and the workpiece, increase the tool life, reduce the roughness, and improve the bearing processing product accuracy.

In conclusion, G20CrMoA bearing steel has the advantages of good hardenability, machinability, small quenching deformation, good surface quality and dimensional accuracy, low cost, good balance between performance and cost, etc. It is suitable for the manufacture of large and medium-sized high-speed and low-temperature bearings.