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.

　　一方面圆钢和螺纹钢的外形不同，圆钢的外表是比拟润滑的，而螺纹钢的表面面是带有螺旋形的肋。另一个方面是会消费规范的不同，在现行规范中，圆钢指的之材质为HPB235级钢筋，它的消费规范是《钢筋混凝土用热轧光面钢筋》。螺纹钢普通指HRB335以及HRB400级钢筋，它的消费规范是《钢筋混凝土用热轧带肋钢筋》。在一个方面就是强度的不同，圆钢HPB235的设计强度为210Mpa。螺纹钢的强度要比圆钢的高，HRB335的设计强度为300Mpa。HRB400的设计强度为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.

　　还有一方面圆钢和螺纹钢的钢种也不同，圆钢属于碳素钢一类，钢种是Q235。螺纹钢属于低合金钢，HRB335级钢筋是20Mnsi(20锰硅)。HRB400级钢筋是20Mnsiv或者20MnsiNb或者是20MnTi等等。在一个旧市物理力学性能不同，由于钢筋的化学成分和强度的不同，因而在物理力学性能方面有所不同，圆钢的冷弯性能比拟好，能够做180度的弯钩，螺纹钢只能做90度的直钩，圆钢的可焊性也是比拟好的，用普通碳素焊条就能够，螺纹钢必需用低合金焊条，螺纹钢在韧性、抗疲倦性能方面还是要好于圆钢的。

　　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.

　　上述就是今日关于圆钢和螺纹钢的不同之处解说，后期将有愈加细致的钢材理论学问解说，也希望业内人士多多的关注：http://www.jzqgc.com/，如果您有济南钢筋批发的需求可以点击我们的官网进行咨询。

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