4e钢筋是几级钢-天气预报

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4e钢筋是几级钢

更新时间： 2020-11-01 00:00:00

4e钢筋是三级钢，螺纹钢筋上的4e含义为HRB400抗震钢筋（HRB400e)。4是HRB400（旧称3级钢筋），e是earthquake的e，意思为抗震。标有e的钢筋已经达到了国家公布的“抗震”钢材标准。hrb400e即指三级抗震钢筋。其与普通钢筋相比较，最大的优点就是抗拉强度和延伸率都比较大，比如，普通hrb400三级钢筋的抗拉强度要求大于400MPa；而如果是hrb400e抗震钢筋，抗拉强度则需达到550MPa以上。

关键词： 4e 钢筋

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