Rebar is a common name for hot rolled ribbed steel rebar. The steel grade of ordinary hot-rolled steel bar is composed of HRB and the minimum yield point of the grade. H, R, and B are the English initials of the three words Hotrolled, Ribbed, and Bars, respectively. According to latest standard of China, there are three kinds of rebar, namely HRB400 steel(ASTM A615, Grade 60), HRB500 steel(ASTM A615, Grade 75) and HRB600 steel(Based on GB/T 1499.2-2018).

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