Cold-formed hollow-section steel (GB/T6728-1986) is a kind of steel material that is formed by cold-forming process and is widely applied in construction, manufacturing and industrial engineering. The advantages of cold-forming are mainly as follows: Firstly, the cross section of the cold-formed hollow-steel has better rigidity and stability than other kinds of steel beam, which can facilitate the structural design and optimize the carrying capacity and structural stability of the building. Secondly, the cold-forming steel has relatively higher plasticity, higher accuracy and better welding process, which can ensure the smooth welding of steel and meet the requirements of coating and painting process. Thirdly, its surface is smooth and the deformation after painting is small, which can ensure the accuracy and beauty of the construction interface. Finally, cold-formed hollow-section steel has low thermal expansion and can reduce energy loss during operation.
The development of cold-formed hollow-section steel has become a trend in the construction industry. Compared with traditional hot-rolled steel, cold-formed hollow-section steel is more economical and environmentally friendly. Although there are many kinds of cold-formed hollow-section steel, the one with GB/T6728-1986 standard is more secure and reliable. With the increasing requirements for the safety and greenness of buildings, the use of cold-formed hollow-section steel will be even more popular in the future.
Cold-formed hollow-section steel not only has better bending capacity and stability, but also has superior forming ability, which can make the steel section have greater sense of reality and publicity, as well as meet the requirements of modern architecture. The application of cold-formed hollow-section steel in building structure is increasing, which is expected to further promote the development of steel structure application. In addition, the cold-formed hollow-section steel can reduce the web thickness and obtain better local buckling resistance. Due to its lower price and higher reliability, cold-formed hollow-section steel has been increasingly favored by many enterprises.
In summary, the application of cold-formed hollow-section steel has many advantages. It is a reliable, sustainable and cost-effective way to construct buildings and is also conducive to energy saving and environmental protection. With the continuous improvement of steelmaking process and technology, as well as the emergence of new materials, the application of cold-formed hollow-section steel will become more diverse and further promote the development of the construction industry.
