In recent years, the performance of the construction steel market in China is weak as a whole, and the performance of hot-rolled threaded steel bars has been depressed for a long time. However, the steel industry itself is constantly trying and making efforts from various perspectives. It is believed that the market performance of hot-rolled rebar will be good in the near future.
At present, both cold-rolled and hot-rolled building steel products are available. Threaded steel bars are classified as small section steel according to their magnitude. Therefore, the scope and flexibility of its use are more. Usually, it is the skeleton of reinforced concrete building components. Threaded steel is usually used in reinforced concrete. Threads play a scientific and effective role in increasing friction, making the bond between steel and concrete very close, forming the effect of occlusion together. It makes it easy to avoid the phenomenon of pumping under the action of external force, and then greatly improves the strength of concrete.
The difference between hot-rolled threaded bars and ordinary round bars is that the surface has longitudinal ribs and transverse ribs. The threads are usually arranged with two longitudinal ribs and uniformly distributed transverse ribs along the length direction. This is a more common way, but there are some different and less common ways of arranging, which are not explained in detail here.
At present, the market is mostly used three-level and four-level seismic reinforcement, the same specifications price gap is still large, specifications are mainly 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 25 mm, 28 mm, 32 mm, the most widely used.
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