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Screw Thread Steel

Description

Rebar is the common name for hot-rolled ribbed steel bars. The grade of ordinary hot-rolled steel bars consists of HRB and the minimum yield point of the grade. H, R, and B are the first letters of the words Hotrolled, Ribbed, and Bars respectively.
Hot-rolled ribbed steel bars are divided into three grades: Level 2 HRB335 (the old brand is 20MnSi), Level 3 HRB400 (the old brand is 20MnSiV, 20MnSiNb, 20Mnti), and Level 4 HRB500.

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