The General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and the National Standardization Administration of China jointly issued a new standard "Hot Rolled Ribbed Reinforcement" (GB 1499.2-2007), and the original standard (GB 1499- 1998) was abolished at the same time. This has caused some repercussions in the field of steel circulation, especially for traders who operate construction steel. Some steel trading companies in Shanghai organize sales staff to study and compare the old and new standards. They feel that there are several changes: First, the new national standards and new standards are mandatory and there is no transition period. It was officially implemented on March 1 day, and the old standard was abolished at the same time. There used to be a transition period of two years, but this time there is no transition period. Second, the content of the new standard has changed greatly, and there are different requirements in the scope of application, brand, size requirements, mechanical properties, surface quality, marking, testing and judgment methods. For example, the new standard adds fine-grained hot-rolled steel bars: HRBF335 and HRBF500 in classification and brand; In the order contract, "standard number, product name, brand of steel bar, nominal diameter, length and weight of steel bar, special requirements" were added. There are also new changes in the regulations on the length of steel bars. The old standard stipulates that "the allowable deviation shall not be greater than +50mm", while the new standard stipulates that "the deviation is 50mm during normal delivery, -50mm when the maximum length is required, and +50mm when the minimum length is required." This means that a 9-meter-long steel bar can be 25mm shorter or 25mm longer, both of which are up to standard. This way, steel mills can save some materials. Third, the new standard has changed the identification of steel bars, and steel traders must master it. Some insiders believe that "for traders, the most important thing is the sign of rebar." The mark is a mark engraved on the steel bar, and the old standard HRB335 is represented by "2"; HRB400 is denoted by "3"; HRB500 is indicated by "4". The logo of the new standard has changed: HRB335 is represented by "3"; HRB400 is denoted by "4"; HRB500 is indicated by "5"; HRBF335 is denoted by "C3"; HRBF400 is denoted by "C4"; HRBF500 is denoted by "C5". The seismic reinforcement with brand F shall be indicated on the signboard and "Quality Guarantee". In the future, I will see "4" engraved on the surface of the steel bar, which is HRB400. Now it is called Grade III steel bar, but the Grade III steel bar will not be weighed in the future. If it is called HRB400 steel bar. Fourthly, the new standard adjusts some indicators of steel bar performance. For example, the new standard reduces the tensile strength of steel bars, the old standard (HRB335, HRBF335) is 490Mpa, and the new standard is changed to ≥ 455 MPa; The old standard (HRB400, HRBF400) is 570Mpa, and the new standard is reduced to ≥540Mpa. The new standard stipulates the surface quality: "As long as the weight, size, cross-sectional area and tensile properties of the samples brushed by wire brushes are not lower than the requirements of this standard, rust, uneven surface or iron scale are not reasons for rejection." That is to say, according to the new standard, rebar rust is not a quality problem, nor a harmful surface defect, so customers can't ask for a return. These are really very important for traders engaged in rebar, so it is necessary to use new standards to protect users and their legitimate interests. Fifth, the new standard is in line with international standards, which is conducive to the export of steel bars. The new standard for hot rolled ribbed bars (GB 1499.2-2007) issued this time corresponds to the international standard ISO 6935-2: 199 1, and also refers to the international standard ISO/DIS 6935-2 (2005), so the new standard is quite different. In this way, the new standard is basically in line with international standards, that is to say, the steel bars produced according to the new standard meet international standards, which is conducive to the direct entry of domestic steel bars into the international market. It is precisely because the new standard is very different from the old standard that many new contents have been added. Therefore, steel traders engaged in steel traders naturally attach great importance to it, and some even organize salesmen to study. Therefore, it is very important to run new standards to safeguard the interests of customers and self-control. If a steel trading company provides a batch of steel bars to downstream customers, the other party says that the tensile strength does not meet the standard after testing, and the trading company comes up with a new standard, and the other party recognizes it at first sight. If it thinks it meets the national standards, it will not raise any quality objection. In addition, the new standard has new regulations and requirements on the brand, size, shape, weight and allowable deviation of steel bars, the contents of the order contract, the detection and judgment methods, etc. And the sales staff who operate rebar must know them in order to safeguard their own legitimate interests and the legitimate interests of customers.
S Shougang HG Hangang 2T Tangshan Steel 2T2 2T3 Jinjiang No.2 Rolling No.3 Steel
2 Cheng Gang 2A Angang 2X Xuangang
2LL Ling Gang 2B Tianjin Porter HL Tianjin Hailong 2TK Tianjin Group Heavy Industry Rolling Mill 2-B Baotou Steel 2TF Daqiuzhuang 2HY Baoding Yaxin 2T2 Rolling 22C Hebei Qinggang 2T3 Rolling 3X2X Xuangang 2LL Ling Gang QG Qingdao Yufeng HGHD Hangang AY Shenyang Yaxin 2 Cheng Gang 2BT Tangshan Yinfeng TH Tonghua 2BS Bazhou 2T Tangshan 2BT Beitai Ayanyangds Hebei Bazhou 2FX SF XX Tianjin Tianfeng LWG(F) Shandong Laiwu YF Silver Half 2TGJ(ZJGF) Shandong Fat.
DG Dagang is AY and Anyang Iron and Steel.
GT is Jiyuan iron and steel
YT Chongqing Cuprous Steel Plant YD Yanggang Group YG Yibin Steel Plant
HL Chongqing Yongchuan Heli SJ Chongqing Yongchuan Jin Shun Rolling Mill HS Chongqing Yongchuan Hongshun Rolling Mill HG Yuxi Iron and Steel Company Guo Hong Rolling Mill HG Yongchuan Hong Guang Casting and Forging Co., Ltd. HG? 6? 1K Yuxi Iron and Steel Metallurgical Building Materials General Factory LF Chongqing Yongchuan Yuxi Iron and Steel Longfeng ZW Luohuang Rolling Mill FJ Henan Fengnan No.9 Rolling Mill GT Henan Jiyuan Guotai Rolling Mill GT Guiyang Special Steel Co., Ltd. 2SF (Chongqing Steel) Chongqing Metallurgical Rolling Mill 2H2 (Chongqing Steel) Chongqing Metallurgical Rolling Mill 2H6 (Chongqing Steel) Chongqing Metallurgical Rolling Mill 2H8 (Chongqing Steel) Chongqing Special Rolling Mill C J (Chongqing Steel) Chongqing Yangtze River Steel Plant SG Shagang Shougang Shuigang WG Wuhan Iron and Steel Co., Ltd. EG Egang BG Bishan Steel Plant Henglong Iron and Steel Co., Ltd. Co., Ltd. DG Dazhou Iron and Steel Company DSG Dazhou Steel Plant HYG Dazhou Hongyu Steel Plant DDG Dazhou Qiligou Steel Plant MC Dazhou Minchuan Steel Plant WH Dazhou Wenhua Steel Plant HY Dazhou Hongyu Steel Plant FD Dazhou Dafu Steel Plant DLS State Wire Drawing Plant XG Dazhou Xiaogongmiao Steel Plant ZK Kaixian Gigi Lai Steel Plant TG Tianxing Steel Plant ZJ Emerging Casting Pipe Plant ZC Zhongxian Steel Processing Plant CLZ Chongqing Old House Steel Company XG Bayi Steel Plant DWChongqing Fulian Rolling Mill WM Chongqing Minhang Rolling mill ZG Sichuan Kaijiangren Steel Plant DSH Sichuan Desheng Iron and Steel Co., Ltd. KG Kungang Group No.1 Rolling Mill WX WISCO Group Xiangfan Iron and Steel Talents Co., Ltd. Guangdong Shaogang: SG Guanggang: Y Egang: EG Guangdong Yougang: YG Xianggang: XA Yufeng: YF Laiwu Iron and Steel: CWG Liugang: GGL Hongda: GCG Jiangxi Eagle Steel: YX Luoyang Iron and Steel:; LDG2 Xinyang, Henan: Wang Xi, Shandong: LXW Xinyu Iron and Steel: YH Changbai Mountain (Tonggang): TH Tangshan Yinfeng: YF Pingxiang Iron and Steel: PG Guangdong Sambo: SB Guangdong Ye Sheng: SY Fushun Xinfu: F Guangxi Fuxin: PFG Shaanxi Longmen: YL2 Hebei Wu 'an: X Jiangxi Yuanxing: YG Hunan Zhuzhou; Lingshan, Harbin Guangxi: LS Hebei Qinggang: SGS Hebei Ye Jing: JY Kungang: KG Shenyang Xiyu: SX.
ZLG is Zaozhuang Lijin Metallurgical Co., Ltd. YL is Yonggang (Lianfeng brand) pg is the steel grade pq of Pingxiang Steel in Jiangxi, so we don't know that HH is the steel grade LX of New Oriental (Huahang brand) and Fuxin is the steel grade of Fuxin Steel in Yancheng, Jiangsu, and there should be three triangles in the middle. HT is the steel grade of Jiangsu Hongtai.
CG Chengdu Iron and Steel Plant Shanxi Changzhi Iron and Steel Plant CW Sichuan Weiyuan Iron and Steel Plant SE Shuicheng Iron and Steel Company YX Chongqing Yuxi Iron and Steel Company YL Shaanxi Longmen Anhui Changjiang Iron and Steel Company
YD Yuanda Steel Plant Hunan Lianyuan Iron and Steel Company TDF Tangshan Iron and Steel Group Jinheng Enterprise Development Company XG Xiangtan Iron and Steel Company KF Yunnan, Yuxi and Xianfu Iron and Steel Company ykk Yuxi Kungang GG Sichuan Guanghan Iron and Steel Plant PG Pengcheng Iron and Steel Company Wanzhou Longteng JG jiuquan iron and steel Group LX Shaanxi Longmen Iron and Steel Co., Ltd., our Wuhan Iron and Steel (Group) Company DSCX (Sichuan) Desheng SGG Shuicheng HY Shanxi Hongyang Jiuquan BC Hunan Lengshuijiang Iron and Steel General Factory CSC Chongzhou Sanjiang Iron and Steel Plant YL Shaanxi Yulong YX Yuxi Iron and Steel Group HD Dazhou Tongchuan Hangda Metal Calendering.