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 for "Hot-rolled Ribbed Steel Bars" (GB1499. 2-2007), the original standard (GB1499-1998) was abolished at the same time. This has caused certain repercussions in the field of steel circulation, especially traders who deal in construction steel. They attach great importance to and pay attention to this. Some steel trading companies in Shanghai organized sales staff to study and compare the old and new standards. They felt that there were several changes: First, the new national standards are mandatory standards, and there is no transition period. They will be officially implemented on March 1. , and at the same time abolished the old standards. In the past, there was usually a two-year transition period, but this time there is no such period. Second, the new standards have changed greatly in terms of content, with different requirements in terms of scope of application, grades, dimensional requirements, mechanical properties, surface quality, marking, detection and judgment methods, etc. For example, the new standard adds fine-grained hot-rolled steel bars: HRBF335, HRBF500 to the classification and grade; and adds "standard number, product name, steel bar grade, steel bar nominal diameter, length and weight, and special requirements to the order contract." There are also new changes in the length regulations of rebar. 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, when the maximum length is required, the deviation is -50mm, and when the minimum length is required, the deviation is 50mm." This means that the current 9-meter fixed-length rebar can be 25mm shorter or 25mm longer, both of which meet the standards. In this way, the steel mill can save some materials. Third, the new standards have made changes in the identification of steel bars, which steel traders must master. Some people in the industry believe that "for traders, the most important thing is the mark of rebar." The mark is the mark engraved on the steel bar. The old standard HRB335 is represented by "2"; HRB400 is represented by "3"; HRB500 Indicated by "4". The signs of the new standard have been changed: HRB335 is represented by "3"; HRB400 is represented by "4"; HRB500 is represented by "5"; HRBF335 is represented by "C3"; HRBF400 is represented by "C4"; HRBF500 is represented by "C5" . Seismic steel bars with grade F must be clearly stated on the sign and "warranty letter". From now on, if you see "4" engraved on the surface of the steel bar, it means HRB400, which is now called Grade III rebar. However, in the future, Grade III rebar will no longer be called HRB400 steel bar. Fourth, the new standards adjust 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 ≥455Mpa; the old standard (HRB400, HRBF400) is 570Mpa, and the new standard drops to ≥540Mpa. The new standard stipulates surface quality: "As long as the weight, size, cross-sectional area and tensile properties of the sample brushed with a wire brush are not lower than the requirements of this standard, rust scale, surface unevenness or iron oxide scale will not be rejected. Reason for acceptance. "This means that according to the new standards, rusty rebar cannot be regarded as a quality problem and is not a harmful surface defect, and customers cannot request returns. These are indeed very important for traders operating rebar, and they must use new standards to protect users and their own legitimate interests. Fifth, the new standards are in line with international standards and are conducive to the export of steel bars. The newly promulgated new standard for "Hot-rolled ribbed steel bars" (GB1499.2-2007) corresponds to the international standard ISO 6935-2:1991, and also refers to the international standard ISO/DIS 6935-2 (2005), so the new standard with larger changes. In this way, the new standards are basically in line with international standards, which means that the steel bars produced according to the new standards meet international standards, which is conducive to the direct entry of domestic steel bars into the international market.

Because the new standards are quite different from the old standards and add a lot of new content, steel traders who are engaged in steel bar traders naturally attach great importance to them, and some even organize sales staff to learn from them. So it's important to implement new standards to maintain customer and self-interest. For example, a steel trading company provides a batch of steel bars to a downstream customer. After testing, the other party says that the tensile strength does not meet the standard. The trading company brings out the new standard. When the other party takes a look at it, they accept it and think it meets the national standard. No more quality objections. In addition, the new standards have new regulations and requirements for the marking, size, shape, weight and allowable deviations of steel bars, ordering contract content, testing and judgment methods, etc. Salespersons who sell rebar must understand it in order to maintain It protects its own legitimate interests and also safeguards the legitimate interests of its customers.

S Shougang HG Handan Iron and Steel 2T Tangshan Iron and Steel 2T2 2T3 Tianjin 2nd Roll 3rd Steel

2 Chenggang 2A Anshan Iron and Steel 2X Xuangang

2LL Linggang 2B Tianjin Porter HL Tianjin Hailong 2TK Tianjin Group Chongke Rolling Mill 2-B Baogang 2TF Daqiuzhuang 2HY Baoding Yaxin 2T2 Roll 2SC Hebei Qinggang 2T3 Roll 3 2X Xuangang 2LL Linggang QG Qingdao Yufeng HGHD Handan AY Shenyang Asia New 2 Chenggang 2BT Tangshan Yinfeng TH Tonghua 2BS Bazhou 2T Tangshan Iron and Steel 2BT Beitai AY Anyang DS Hebei Bazhou 2FX Shunfeng XX Tianjin Tianfeng LWG (F) Shandong Laiwu YF Yinban 2TGJ (ZJGF) Shandong Feicheng BT Liaoning Benxi SGS ( Shunshang) Qingxian Rolling SE Heavy Steel Co., Ltd.

DG Dagang Co., Ltd. is Anyang Steel Co., Ltd.

GT is Jiyuan Steel Co., Ltd.

YT Chongqing Yatong Steel Plant YD Yang Steel Group YG Yibin Steel Mill

HL Chongqing Yongchuan Heli SJ Chongqing Yongchuan Shunjin Rolling Mill HS Chongqing Yongchuan Hongshun Rolling Mill HG Yuxi Iron and Steel Company Hongguo Rolling Mill HG Yongchuan Hongguang Casting and Forging Co., Ltd. HG?6?1K Yuxi Steel Metallurgical Building Materials General Plant LF Chongqing Yongchuan Yuxi Steel Longfeng ZW Luohuang Rolling Mill FJ Henan Fengnan Ninth Rolling Mill GT Henan Jiyuan Guotai Rolling Mill GT Guiyang Special Steel Co., Ltd. 2SF ( Chongqing Metallurgical Rolling Mill 2H2 (Chongqing Steel) Chongqing Metallurgical Rolled Products Factory 2H6 (Chongqing) Chongqing Metallurgical Rolling Processing Plant 2H8 (Chongqing) Chongqing Special-shaped Rolling Mill CJ (Chongqing) Chongqing Yangtze Steel Mill SG Shagang Shougang Shuigang WG Wuhan Steel Co., Ltd. EG Egang BG Bishan Steel Plant Henglong Steel Co., Ltd. DG Dazhou Steel Company DSG Dazhou Steel Plant HYG Dazhou Hongyu Steel Plant DDG Dazhou Qiligou Steel Plant MC Dazhou Minchuan Steel Plant WH Dazhou Wen Hua Steel Plant HY Dazhou Hongyu Steel Plant FD Dazhou Fuda Steel Plant DLS Dazhou City Wire Drawing Plant XG Dazhou Xiaogongmiao Steel Plant ZK Kaixian Zili Steel Plant TG Tianxing Steel Plant ZJ Xinxing Cast Pipe Plant ZC Zhongxian Steel Processing Plant CLZ Chongqing Laowu Steel Company Materials Co., Ltd. Guangdong Shaogang: SG Guangzhou Iron and Steel: Y Esteel: EG Guangdong Friendship Steel: YG Xiangshan Iron and Steel: XA Yufeng: YF Laiwu Steel: CWG Liuzhou Iron and Steel: GGL Hongda: GCG Jiangxi Yinggang: YX Luoyang Steel:; Henan Xinyang: YA Shandong Xiwang: LXW Xinyu Iron and Steel: YH Changbaishan (Tongshan Iron and Steel): TH Tangshan Yinfeng: YF Pingxiang Iron and Steel: PG Guangdong Sanbao: SB Guangdong Shengye: SY Fushun Xinfu: F Guangxi Fuxin: PFG Shaanxi Longmen ：YL2 Hebei Wu'an: Company YL is Yonggang (Lianfeng brand) pg is the steel number of Jiangxi Pingxiang Steel pq I don’t know. HH is the steel number of New Oriental (Huahang brand) LX is the steel number of Jiangsu Yancheng Lianxin Steel FU XIN is Fuxin Steel Steel number, there should be three triangles in the middle.

HT is the steel number of Jiangsu Hongtai

CG Chengdu Steel Plant Shanxi Changzhi Steel Plant CW Sichuan Weiyuan Steel Plant SE Shuicheng Steel Company YX Chongqing Yuxi Steel Company YL Shaanxi Longmen Anhui Changjiang Steel

YD Yuanda Steel Plant Hunan Lianyuan Steel Company TDF Tangshan Steel Group Jinheng Enterprise Development Company Longteng JG Jiuquan Iron and Steel Group LX Shaanxi Longmen Iron and Steel Co., Ltd. WE Wuhan Iron and Steel (Group) Company DSCX (Sichuan) Desheng SGG Shuicheng HY Shanxi Hongyang Jiuquan BC Hunan Lengshuijiang Iron and Steel Plant CSC Chongzhou Sanjiang Iron and Steel Plant YL Shaanxi Yulong YX Yuxi Steel Group HD Hangda Metal Rolling, Tongchuan District, Dazhou City