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(lái)，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(qū)別和相同之處，是否可以用三級(jí)地震鋼來(lái)代替三級(jí)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　　In recent years, HRB400 steel bar has been replaced by hrb400e steel bar.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(lái)看看他們的成績(jī),hrb400e hrb400“E”的視覺差異,近年來(lái)地震指數(shù)增加,建設(shè)高標(biāo)準(zhǔn)的“E”是指使用的抗震要求鋼結(jié)構(gòu),其力學(xué)特性是衡量抗拉強(qiáng)度和屈服強(qiáng)度比不小于1.25,實(shí)測(cè)屈服強(qiáng)度和屈服強(qiáng)度比不大于1.30的規(guī)定的標(biāo)準(zhǔn),而且大到總伸長(zhǎng)不小于9%。這樣的鋼筋是目前建筑要求能夠滿足標(biāo)準(zhǔn)的品種，所以雖然三級(jí)螺桿式鋼筋在其他等級(jí)市場(chǎng)上的要求是一樣的，但這一關(guān)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(qiáng)度標(biāo)準(zhǔn)值為400MPa，設(shè)計(jì)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(wú)特殊要求的建筑工程中。那么今天的hrb400鋼筋相關(guān)知識(shí)就介紹在這里，有更多的濟(jì)南鋼筋批發(fā)知識(shí)帶給您，希望您多多關(guān)注我們的網(wǎng)站:http://www.angcao.cn/

　　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.angcao.cn/