Q390D seamless steel pipe is a high-strength, low-alloy, corrosion-resistant seamless steel pipe, which is widely used in construction, machinery, chemical industry, petroleum, electric power and other fields. Its Q390D grade indicates that the steel pipe has a yield strength of 390MPa and a quality grade of D.
Q390D seamless steel pipe
Executive standard: GB T8162 seamless steel pipe for structure, GB T8163 seamless steel pipe for fluid transportation.
Q390D mechanical properties: tensile strength 490 650MPa, wall thickness 16 thick yield strength 390MPa, wall thickness 16mm 30mm yield strength 370, wall thickness 30mm yield strength 350MPaImpact test Q390D minus 20 impact energy 34, Q390D seamless steel pipe chemical composition: carbon: 020, Silicon: 050, manganese: 170, phosphorus: 0030, sulfur: 0025, niobium: 007, vanadium: 020, Titanium: 020, Cr: 030, Nickel: 050, copper: 020, nitrogen: 0015, molybdenum: 010 , aluminum, 0015.
The characteristics of Q390D seamless steel pipe are mainly manifested in the following aspects:
1.High strength: The yield strength of Q390D seamless steel pipe is 390MPa, which is much higher than that of ordinary seamless steel pipe, which can withstand higher pressure and load, and has stronger tensile strength and yield point. Therefore, in the fields of construction and machinery, Q390D seamless steel pipe can replace some traditional high-strength materials such as alloy steel and stainless steel to reduce engineering costs.
2.Low alloy: Q390D seamless steel pipe is designed with low alloy element composition, which is lower production cost and more environmentally friendly than traditional high alloy steel and stainless steel. At the same time, the use of low-alloy elements also makes Q390D seamless steel pipes excellent in terms of corrosion resistance and welding performance.
3.Corrosion resistance: Q390D seamless steel pipe has undergone special anti-corrosion treatment, has good corrosion resistance, and can adapt to various harsh environmental conditions, such as acid, alkali, salt and other chemical media environment and marine atmospheric environment. This makes Q390D seamless steel pipe widely used in chemical, petroleum, electric power and other fields.
4.Good welding performance: Q390D seamless steel pipe has low alloy element content, and it is not easy to produce defects such as cracks and porosity during welding, and the welded joint has high strength and good toughness. This makes Q390D seamless steel pipe more convenient and faster in the manufacturing and construction process, reducing the difficulty and cost of welding.
5.Complete specifications: Q390D seamless steel pipe has complete specifications, and different specifications and thicknesses of steel pipes can be selected according to different engineering needs. At the same time, Q390D seamless steel pipe can also be customized according to customer requirements with special specifications and special processing requirements to meet the individual needs of customers.
In practical application, the advantages of Q390D seamless steel pipe have been fully reflected. For example, in the construction field, Q390D seamless steel pipe can be used in high-rise buildings, long-span structures and other occasions that need to withstand high loads; In the field of machinery, Q390D seamless steel pipe can be used to manufacture heavy equipment, pressure vessels and other equipment that needs to withstand high pressure and high temperature; In the chemical and petroleum fields, Q390D seamless steel pipes can be used for transporting corrosive media and high-temperature fluids and other occasions that require corrosion resistance and high strength; In the power sector, Q390D seamless steel pipes can be used to manufacture power poles, transmission lines and other facilities that need to withstand high voltages and high currents.
In a word, Q390D seamless steel pipe, as a high-strength, low-alloy, corrosion-resistant seamless steel pipe, has a wide range of application prospects and market potential. With the continuous development of science and technology, it is believed that Q390D seamless steel pipe will be applied and promoted in more fields. At the same time, with the continuous improvement of environmental awareness, low-alloy and environmentally friendly materials will be more and more favored and valued. Therefore, the development prospect of Q390D seamless steel pipe will be broader.