There are two common classification methods for rebar: one is based on geometric shape, which is classified or divided according to the different cross section shape and rib spacing. For example, in British Standard (BS4449), rebar is divided into type I and type II. This classification mainly reflects the gripping performance of deformed steel bars. Second, according to the performance classification (grade), for example, in the current executive standard of our country, the rebar is (G B1499.2-2007) and the wire rod is 1499.1-2008), the rebar is divided into three grades according to the strength level (yield point/tensile strength); According to the Japanese industrial standard (JI SG3112), rebar is divided into five categories according to its comprehensive properties; The British Standard (BS4461) also specifies several grades of performance test for deformed steel bars. In addition, rebar can also be classified according to its purpose, such as ordinary rebar for reinforced concrete and heat-treated rebar for prestressed reinforced concrete.
The deformed steel bars are divided into ordinary hot-rolled steel bars and fine-grained hot-rolled steel bars. According to the definition of the standard, ordinary hot-rolled steel bars are steel bars delivered in hot-rolled condition. Its metallographic structure is mainly composed of ferrite and pearlite, and there shall be no other structure that affects the service performance. The fine-grained hot-rolled steel bar refers to the fine-grained steel bar formed by controlled rolling and controlled cooling process during the hot rolling process. Its metallographic structure is mainly composed of ferrite and pearlite, and there shall be no other structure affecting the service performance, and the grain size shall not be coarser than Grade 9.
The grade of ordinary hot-rolled ribbed steel bar is composed of HRB, characteristic value of yield strength and anti-seismic sign (+E); The grade of fine-grained hot-rolled ribbed steel bar is composed of HRBF, characteristic value of yield strength and anti-seismic sign (+E); F is the first letter of Fine. Ordinary hot-rolled steel bar grades are divided into five grades: HRB400, HRB500, HRB600, HRB400E and HRB500E; The grades of fine-grained hot-rolled steel bars are divided into HRBF400, HRBF500, HRBF400E and HRBF500E.
Screw thread steel is widely used in civil engineering construction such as houses, bridges and roads. From highways, railways, bridges, culverts, tunnels, flood control, dams and other public facilities, to the foundations, beams, columns, walls, plates, and rebar of buildings and buildings are indispensable structural materials. At present, HRB400 or HRB400E steel bars have been widely used in the world. Our company can customize HRB500, HRB600 and other high-strength deformed steel bars.
Standards of rebar our company can supply
Chinese standard GB1499.2-2007
Grade II deformed steel HRB335
Grade III deformed steel HRB400
Three-class seismic deformed steel HRB400E
Grade IV deformed steel HRB500
Grade IV seismic deformed steel HRB500E
English standrd BS4449-2005 460B 500B
American atandard ASTM A615/A 615-04a GR40 GR60 GR75
Korea standard KSD3405-2011 SD400 SD500
Japanese standard JIS G3112-2004 SD390
We JINBAICHENG is one of the renowned manufacturer, exporter, stockist, stock holder and supplier of deformed steel bars. We have customer from Mexico, Turkey, Pakistan, Oman, Israel, Egypt, Arab,Vietnam, Myanmar, German, etc.
Website: www.sdjbcmetal.com
Email: jinbaichengmetal@gmail.com
Post time: Mar-16-2023