Ordinary hot-rolled steel grades by HRB and its brands constitute the minimum yield point. H, R, B respectively, hot-rolled (Hotrolled), ribbed (Ribbed), steel (Bars) the first three words of the English alphabet. Hot-rolled ribbed steel division two HRB335 (old No. 20MnSi), three HRB400 (old number 20MnSiV, 20MnSiNb, 20Mnti), four HRB500 three grades. The difference between rebar and round bar: the difference between rebar and round bar is a surface with longitudinal ribs and transverse ribs 6mm steel purchases, usually with two longitudinal ribs and channels evenly distributed along the length of the transverse ribs. Is a small steel rebar steel, mainly used for the skeleton of reinforced concrete building elements. In use requires a certain degree of mechanical strength, bending welding performance and process performance. Production of raw steel billet for carbon steel or low-alloy structural steel smelting process by sedation. 6mm steel plant _6mm cold-rolled steel _ Ding Ding Ding Ding Industrial Co., Ltd., Henan Province by. Ding Ding Industrial Co., Ltd., Henan Province (www.hnddsy.com) strong, credible, and other industries in other Anyang accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Dingding cold rolling and you hand into the brilliant, for a better future!