On the one hand, in terms of material, rebar contains more ferromanganese, has higher strength, stronger tensile resistance, and higher yield than ordinary steel bars, so it is often used in high-rise load-bearing parts and places that require high tensile strength. On the other hand, from the surface point of view, smooth ordinary (not threaded) steel bars are smooth steel bars without raised patterns on the surface, and they are all coiled into a coil, with specifications of 6.5mm, 8mm, 10mm, and 12mm. In contrast, the surface of the rebar coil is a steel bar with a threaded or crescent-shaped or herringbone-shaped raised pattern. Generally, the size of 8mm-10mm is also coiled, and the size of 12mm-32mm is straight.

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