Two days ago, a friend left a message to Xiaobian, asking what level of reinforcement is hrb400? For the small editors who have been in the steel market for many years, this problem is naturally very simple, but for the friends who have just entered the steel market, it makes them difficult.

　　那么到底hrb400是几级钢筋呢？hrb400钢筋也叫三级螺纹钢，是热轧带肋钢筋的一种。hrb400是此钢筋的牌号。钢材牌号，又称钢铁产号，一般采用汉语拼音字母，化学元素符号和阿拉伯数字相结合表示钢材产品名称、用途、特性和工艺的方法。

　　So what level of reinforcement is hrb400? HRB400 steel bar, also known as three-stage threaded steel, is a kind of hot-rolled ribbed steel bar. HRB400 is the brand of this steel bar. Steel brand, also known as steel product brand, generally uses Chinese phonetic alphabet, chemical element symbols and Arabic numerals to express the name, use, characteristics and process of steel products.

　　说到这，我们也简单来介绍一下三级螺纹钢。螺纹钢属于小型型钢钢材，主要用于钢筋混凝土建筑构件的骨架。在使用中要求有一定的机械强度、弯曲变形性能及工艺焊接性能。生产螺纹钢的原料钢坯为经熔炼处理的碳素结构钢或低合金结构钢，成品钢筋为热轧成形、正火或热轧状态交货。

　　Speaking of this, we also briefly introduce the third-grade threaded steel. Threaded steel belongs to small steel, which is mainly used for the skeleton of reinforced concrete building components. Some mechanical strength, bending deformation and welding properties are required in use. The raw material for producing threaded steel is carbon structural steel or low alloy structural steel treated by sedation melting, and the finished steel bar is delivered in hot rolling, normalizing or hot rolling state.

　　关于hrb400是几级钢筋的介绍，就暂时告一段落了，如果大家还想要了解更多钢材方面的小知识，就多多关注济南佳正强钢材有限公司吧，也会为大家带来更多钢材知识的。

　　About HRB400 is the introduction of several grades of steel bar, it is temporarily over. If you want to know more about steel, you should pay more attention to Jinan Jiazhengqiang Steel Co., Ltd., which will also bring you more steel knowledge.