In construction, we have many common steel products, among which round steel and thread steel are the most common, and round steel and thread steel are a superficial term for different kinds of steel bars. The main differences between them are the following points. Today we will stop talking about the relevant differences.
On the one hand, the shape of round steel is different from that of threaded steel. The appearance of round steel is comparable to that of lubricated steel, while the surface of threaded steel has spiral ribs. Another aspect is the difference of consumption norms. In the current norms, round steel refers to the material of HPB235 steel bar. Its consumption norm is "hot rolled smooth steel bar for reinforced concrete". Threaded steel generally refers to HRB335 and HRB400 steel bars. Its consumption standard is "Hot Rolled Ribbed Steel Bars for Reinforced Concrete". In one aspect, the strength is different. The design strength of round steel HPB235 is 210 Mpa. The strength of threaded steel is higher than that of round steel, and the design strength of HRB335 is 300 Mpa. The design strength of HRB400 is 360 Mpa.
On the other hand, round steel and threaded steel are different. Round steel belongs to the category of carbon steel, and the steel grade is Q235. Thread steel belongs to low alloy steel, and HRB335 steel bar is 20Mnsi (20MnSi). HRB400 steel bar is 20Mnsiv or 20MnsiNb or 20MnTi and so on. In an old city, the physical and mechanical properties are different, because of the different chemical composition and strength of reinforcing bars, so the physical and mechanical properties are different. The cold bending performance of round steel is better than that of round steel. It can be used as 180 degree hook. The threaded steel can only be used as 90 degree straight hook. The weldability of round steel is also better than that of conventional carbon welding rod. The threaded steel must use low alloy welding rod and thread. Steel is better than round steel in toughness and fatigue resistance.
Above is today's commentary on the differences between round steel and thread steel. Later, there will be more detailed and comprehensive explanations of steel theory. I hope that the industry will pay more attention to them: http://www.namegeneration.net/. If you have the demand of Jinan reinforcing steel wholesale, you can click on our official website for consultation.