The material of rebar mainly includes three types, namely HRB 335, HRB400, HRB500. The grade strength of these three materials is different. However, according to the latest Chinese national standard regulations, China has canceled HRB335MPa steel bars and added HRB600MPa steel bars, forming a series of strength levels of 400MPa, 500MPa, and 600MPa. Afterwards, this standard will be implemented uniformly.

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