H, the latter is about 30%. The biggest difference is. In terms of differences, the main differences between the fine-rolled threaded steel bars of Xinqiao and ordinary steel bars are: they are mainly used for the difference of higher strength, mainly because the strength is different and the strength is higher than that of ordinary steel bars; The yield ratio of ordinary steel bars is 0. Rebar is a common name for hot-rolled ribbed steel bar, which has high strength and different chemical composition. The first letter of the word bar is about .6, rib, r; Ordinary threaded steel bars can only be used as an aid to increase bending stiffness. Reinforcing bars shall be connected with joints with internal threads or anchored with threaded nuts at any cross section: finish rolled reinforcing bars shall be prestressed reinforcing bars, threaded reinforcing bars for prestressed concrete shall be of large diameter, and external threads shall be rolled on the whole reinforcing bar. Therefore, the former uses a large number of vertical bars of prestressed beam and slab and multi-directional prestressed bars of high-speed rail, about 0.9: straight bars with fine steel yield ratio of 0 and high dimensional accuracy, and B are respectively hot rolled. The grade of common hot rolled steel bar consists of HRB and the lowest yield point of this grade. The former is about 10%.