What material is Q390B steel plate? What are the features?

Q390B steel plate is a kind of low-alloy high-strength structural steel. It not only has the characteristics of high-strength steel but also belongs to the category of low-carbon steel. With its excellent mechanical properties and wide range of uses, Q390B has become one of the indispensable materials in modern industry.​

Q390B has a relatively high yield strength, which means that it can maintain the stability of the structure and is not prone to plastic deformation when subjected to external forces.

In addition, it also has good fatigue resistance, enabling it to have a long service life under cyclic loads.

Q390B also has high toughness and a low brittle transition temperature, so it can maintain good toughness even at low temperatures, reducing the risk of fracture.​

In addition to mechanical properties, Q390B also has good cold forming performance and welding performance. It is easy to be processed into components of various shapes and sizes, and can still maintain its excellent performance under different welding processes. This enables

Q390B to have greater flexibility and adaptability in the manufacturing process.

Moreover, Q390B has good corrosion resistance and certain wear resistance, allowing it to be used for a long time in harsh environments without being affected by corrosion and wear.​

The implementation standard for Q390B steel plate is GB/T1591-2018, which specifies its chemical composition, mechanical properties, smelting methods and delivery status. According to different application requirements, Q390B steel plates can be delivered in hot-rolled, controlled-rolled, normalized, normalized-tempered, thermomechanical controlled rolling (TMCP) or thermomechanical controlled rolling and tempered states. These different delivery states enable Q390B steel plates to adapt to various processing techniques and application scenarios.​

When the steel plate is required to have thickness direction performance, symbols Z15, Z25 and Z35 representing the performance grades in the thickness direction will be added after the grade of Q390B steel plate. These symbols indicate the performance grade of the steel plate in the thickness direction, ensuring its reliability and safety in specific applications.​

Q390B steel plates have a wide thickness range, which can be produced from 8mm to 700mm, among which the material performance of 400mm thick steel plates is guaranteed. The steel plates can also be cut into irregular parts as needed to meet the requirements of different projects. The smelting methods of Q390B steel plates include converter or electric furnace smelting, and external refining can be carried out when necessary to ensure the purity and uniformity of the steel.​

The dimensions, shape, weight and allowable deviations of Q390B steel plates shall comply with the corresponding standard GB/T709. This standard specifies the geometric parameters and tolerance ranges of the steel plates to ensure the consistency and interchangeability of the products.​

Q390B steel plates are widely used in fields such as power towers, various types of cranes, heavy-duty vehicles, oil derricks, high-temperature fans, large forklifts, dump trucks and drilling rigs, coal mine hydraulic supports, and steel structures. Its excellent performance and reliability make it the preferred material in these fields, providing a solid foundation and guarantee for various projects.

Email: info@gneesteels.com
Whatsapp (WeChat): +86 15824687445