What is the difference between the material of steel thread and its use?
Main uses: widely used in housing, bridges, roads and other civil engineering construction.Main origin: the manufacturer of thread steel is mainly distributed in North China and Northeast China
The grade of thread steel is composed of the minimum value of the yield point of HRB and brand. H, R, and B are the first letters in English for hot-rolled (Hotrolled), ribbed (Ribbed) and reinforced (Bars) three words. Hot rolled ribbed bar is divided into HRB335 (old No. 20MnSi), HRB400 (20MnSiV, 20MnSiNb, veteran, 20Mnti), HRB500 three brands.
There are two kinds of thread classification methods:First, the geometric shapes are classified and classified according to the cross sectional shape of the ribs and the pitch of the ribs. For example, the British Standard (BS4449), the steel is classified into type I and type ii.Two is in the performance classification (grade), for example our country standard (G B1499), according to the strength level (yield / tensile strength) will be divided into 3 grades of thread steel;
