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.

　　一方面圓鋼和螺紋鋼的外形不同，圓鋼的外表是比擬潤滑的，而螺紋鋼的表面面是帶有螺旋形的肋。另一個方面是會消費規范的不同，在現行規范中，圓鋼指的之材質為HPB235級鋼筋，它的消費規范是《鋼筋混凝土用熱軋光面鋼筋》。螺紋鋼普通指HRB335以及HRB400級鋼筋，它的消費規范是《鋼筋混凝土用熱軋帶肋鋼筋》。在一個方面就是強度的不同，圓鋼HPB235的設計強度為210Mpa。螺紋鋼的強度要比圓鋼的高，HRB335的設計強度為300Mpa。HRB400的設計強度為360Mpa。

　　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.

　　還有一方面圓鋼和螺紋鋼的鋼種也不同，圓鋼屬于碳素鋼一類，鋼種是Q235。螺紋鋼屬于低合金鋼，HRB335級鋼筋是20Mnsi(20錳硅)。HRB400級鋼筋是20Mnsiv或者20MnsiNb或者是20MnTi等等。在一個舊市物理力學性能不同，由于鋼筋的化學成分和強度的不同，因而在物理力學性能方面有所不同，圓鋼的冷彎性能比擬好，能夠做180度的彎鉤，螺紋鋼只能做90度的直鉤，圓鋼的可焊性也是比擬好的，用普通碳素焊條就能夠，螺紋鋼必需用低合金焊條，螺紋鋼在韌性、抗疲倦性能方面還是要好于圓鋼的。

　　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.

　　上述就是今日關于圓鋼和螺紋鋼的不同之處解說，后期將有愈加細致的鋼材理論學問解說，也希望業內人士多多的關注：http://www.ozhouu.com/，如果您有濟南鋼筋批發的需求可以點擊我們的官網進行咨詢。

　　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.ozhouu.com/. If you have the demand of Jinan reinforcing steel wholesale, you can click on our official website for consultation.