Material HRB500 origin / manufacturer dedicated weighing weight concept Shijiazhuang warehouse dedicated warehouse where the city library genuine quality level (accepted by mass opposition) uses a range of metal products, machinery manufacturing, rail transportation, building decoration processing services without processing and distribution services to the sales and distribution factory goods type spot size φ10, φ12, Φ14, Φ15, φ16, φ18, Φ20, φ22, Φ25, Φ32, φ36, φ40 rebar surface ribbed steel, also known as ribbed steel bars, usually with two longitudinal ribs and along evenly distributed in the longitudinal direction transverse ribs. Transverse ribs helical shape, herringbone, crescent three kinds. With a nominal diameter of a few millimeters. Public ribbed steel nominal diameter corresponds to the cross section such as round bar nominal diameter. Steel 8-50 mm nominal diameter is recommended 6.5,8,10,12,16,18,20,22,25,28,32,36,40 mm diameter. Ribbed bars in concrete main tensile stress. Ribbed steel bars since the ribs of the role, and concrete have greater bonding capacity, which can better withstand external forces. Ribbed steel is widely used in a variety of building structures, especially for large, heavy, light thin wall and high-rise structures. Processing: rebar is produced by a small mill, small mill into main types: continuous, semi-continuous and transversal type. Currently the new world and in use at full continuous bar mill majority. Today's popular steel mill has a versatile high speed steel rolling mill and steel mill 4 split high yield. Category: Two steel commonly used classification methods: First, the geometry of the tree, according to the cross-sectional shape of the ribs and rib spacing different classification or classification, such as British Standard (BS4449), the rebar into Ⅰ type, Ⅱ type. This classification main reaction grip performance of rebar. Second, the performance classification (class), such as our standards (GB1499.2-2007), press the intensity level (yield point / tensile strength) will be divided into three grades of rebar; Japanese Industrial Standard (JISG3112), press the overall performance will be divided into five types of steel; British Standard (BS4461), and also provides a number of performance tests grade steel. But it can also be classified by purpose steel, such as into an ordinary reinforced concrete and reinforced concrete with steel and other heat treatment. Our reinforced concrete rolled ribbed steel according to national standards, grades and grades by the HRB constitute the minimum yield point. H, R, B, respectively, hot-rolled (Hotrolled), ribbed (Ribbed), steel (Bars) the first three words of English letters. Rolled ribbed steel bars into HRB335 (old number 20MnSi), HRB400 (old number 20MnSiV, 20MnSiNb, 20Mnti), HRB500 three grades. "