As we all know, China's iron and steel industry has experienced many years of ups and downs, and has transited from the rapid development stage to the weak adjustment stage. The improvement of products has also changed a lot. The most prominent ones are HRB400 steel bar (three-level threaded steel bar) and hrb400e steel bar (three-level seismic threaded steel bar). In the field of building reinforcement, the third-grade threaded steel bar has the longest "domination" time and the largest proportion in the field of use.

　　近年來，hrb400鋼筋已被hrb400e鋼筋所取代。那么我們是否知道它們之間的區別和相同之處，是否可以用三級地震鋼來代替三級地震鋼呢?

　　In recent years, HRB400 steel bar has been replaced by hrb400e steel bar. So do we know the differences and similarities between them, and can we use three-level seismic steel instead of three-level seismic steel?

　　我們來看看他們的成績,hrb400e hrb400“E”的視覺差異,近年來地震指數增加,建設高標準的“E”是指使用的抗震要求鋼結構,其力學特性是衡量抗拉強度和屈服強度比不小于1.25,實測屈服強度和屈服強度比不大于1.30的規定的標準,而且大到總伸長不小于9%。這樣的鋼筋是目前建筑要求能夠滿足標準的品種，所以雖然三級螺桿式鋼筋在其他等級市場上的要求是一樣的，但這一關鍵抗震性能還不夠，所以很多已被淘汰。兩者主要相似之處在于，低屈服強度標準值為400MPa，設計值為360MPa。

　　Let's take a look at their achievements. The visual difference of hrb400e HRB400 "E" has increased in recent years. The construction of high-standard "E" refers to the steel structure required for seismic resistance. Its mechanical characteristics are to measure the ratio of tensile strength to yield strength not less than 1.25, the ratio of measured yield strength to yield strength not less than 1.30, and the maximum elongation is not less than 9%. This kind of reinforcement can meet the requirements of the current building standards, so although the requirements of three-stage screw reinforcement are the same in other grades of the market, but this key seismic performance is not enough, so many of them have been eliminated. The main similarity between them is that the standard value of low yield strength is 400 MPa and the design value is 360 MPa.

　　HRB400鋼筋可用于一些無特殊要求的建筑工程中。那么今天的hrb400鋼筋相關知識就介紹在這里，有更多的濟南鋼筋批發知識帶給您，希望您多多關注我們的網站:http://www.h2690.com/

　　HRB400 steel bar can be used in some construction projects without special requirements. So today's HRB400 reinforcing bar related knowledge is introduced here, more reinforcing bar knowledge to you, I hope you pay more attention to our website: http://www.h2690.com/