GB/T 20564.1-2017 PDF EnglishUS$135.00 · In stock · Download in 9 seconds
GB/T 20564.1-2017: Continuously Cold Rolled High Strength Steel Sheet and Strip for Automobile - Part 1: Bake Hardening Steel Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 20564.1: Historical versions
Similar standardsGB/T 20564.1-2017: Continuously Cold Rolled High Strength Steel Sheet and Strip for Automobile - Part 1: Bake Hardening Steel---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT20564.1-2017 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.50 H 46 Replacing GB/T 20564.1-2007 Continuously Cold Rolled High Strength Steel Sheet and Strip for Automobile – Part 1.Bake Hardening Steel Issued on. SEPTEMBER 07, 2017 Implemented on. JUNE 01, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of PRC. Table of ContentsForeword... 3 1 Scope... 5 2 Normative References... 5 3 Terms and Definitions... 7 4 Classification and Grade Expression Method... 7 5 Ordering Contents... 8 6 Dimension, Appearance, Weight... 9 7 Technical Requirements... 9 8 Test Methods... 11 9 Inspection Rules... 12 10 Package, Mark and Quality Certificate... 13 Appendix A (Informative) Chemical Compositions of Steel... 14 Appendix B (Informative) Approximate Comparison between Domestic and Foreign Grades... 15ForewordGB/T 20564 Continuously Cold Rolled High Strength Steel Sheet and Strip for Automobile can be divided into 11 parts. --- Part 1.Bake Hardening Steel; --- Part 2.Dual Phase Steel; --- Part 3.High Strength Interstitial Free Steel; --- Part 4.High Strength Low Alloy Steel; --- Part 5.Isotropic Steel; --- Part 6.Transformation Induced Plasticity Steel; --- Part 7.Martensitic Steel; --- Part 8.Complex Phase Steel; --- Part 9.Quenching and Partitioning Steel; --- Part 10.Twinning Induced Plasticity Steel; --- Part 11.Carbon Manganese Steel. This Part belongs to Part 1 of GB/T 20564. This Part was drafted as per the rules specified in GB/T 1.1-2009. This Part replaced GB/T 20564.1-2007 Continuously Cold Rolled High Strength Steel Sheet and Strip for Automobile – Part 1.Bake Hardening Steel; compared with GB/T 20564.1-2007, this Part has the major technical changes as follows. --- Modify the nominal thickness range (see Clause 1 of this Edition; Clause 1 of Edition 2007); --- Add risk warning for non-oiled products and regulations on production completion date (see 7.3.2 of this Edition); --- Add explanation on the guarantee period of mechanical properties (see 7.4.1 of this Edition); --- Add provisions for the mechanical properties, when supplying products as per the specified parts (see 7.4.3 of this Edition); --- Modify the mechanical properties indexes of each grade (see Table 4 of this Edition; Table 4 of Edition 2007); --- Add the requirements for tensile test method (see 8.3 of this Edition); --- Delete the original Appendix B “Measurement Method for Bake Hardening Value BH2”; directly quote GB/T 24174 (see Table 7 of this Edition; Appendix B of Edition 2007). This Part was proposed by China Iron and Steel Industry Association. This Part shall be under the jurisdiction of National Technical Committee for Standardization of Steel (SAC/TC 183). Drafting organizations of this Part. Baoshan Iron & Steel Co., Ltd., Shougang Corporation, Bengang Group Co., Ltd., China Metallurgical Information and Standardization Institute, Xinyu Iron & Steel Co., Ltd., Angang Steel Company Limited, and Handan Iron and Steel Co., Ltd. Chief drafting staffs of this Part. Zhu Yan, Zhang Weixu, Hu Ling, Sun Zhongming, Ban Bijun, Wei Dong, Wang Zhongdong, Li Qian, Yang Yuanhua, Wang Yue, Li Yuqian, Tu Shulin, Liu Jun, Lu Baiyan, Chen Jianhua, Su Haolu, and Huang Jinhua. The historical edition replaced by this Standard is as follows. --- GB/T 20564.1-2007. Continuously Cold Rolled High Strength Steel Sheet and Strip for Automobile – Part 1.Bake Hardening Steel1 ScopeThis Part of GB/T 20564 specifies the terms and definitions, classification and grade expression method, dimension, shape, weight, technical requirements, test methods, inspection rules, package, marking and quality certificate of cold rolled bake hardening high strength steel sheet and strip. This Part is applicable to the steel sheet and strip with thickness of 0.50mm ~ 3.00mm (hereinafter referred to as “steel sheet and strip”) used for manufacturing automobile external and internal plates and partial structures.2 Normative ReferencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document. GB/T 223.5 Steel and Iron - Determination of Acid-Soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method GB/T 223.9 Iron Steel and Alloy - Determination of Aluminum Content - Chrom Azurol S Photometric Method GB/T 223.16 Methods for Chemical Analysis of Iron, Steel and Alloy - The Chromotropic Acid Photometric Method for the Determination of Titanium Content GB/T 223.40 Iron, Steel and Alloy - Determination of Niobium Content by the Sulphochlorophenol S Spectrophotometric Method3 Terms and DefinitionsThe following terms and definitions are applicable to this document. 3.1 Bake hardening steel; BH A certain amount of solid-solubilized carbon and nitrogen atoms are retained in the steel; meanwhile increase the strength by adding phosphorus, manganese and other strengthening elements.4 Classification and Grade Expression Method4.1 Classification 4.1.1 The classification of steel sheet and strip as per the use can refer to Table 1. 4.1.2 The classification of steel sheet and strip as per the surface quality can refer to Table 2. 4.2 Grade expression method The grade of steel sheet and strip consists of three parts like initial of “Cold Rolled” of “CR”, specified minimum yield strength value, initial of “Bake Hardening” of “BH”.5 Ordering Contents5.1 The contract or purchasing list ordering products as per this Part shall include the following contents. 5.2 If the ordering contract doesn’t specify the dimension and roughness accuracy, surface quality level, surface structure type, edge state and package, etc.; then the products in this Part shall be delivered as per the ordinary dimension and roughness accuracy, relative-high surface, pitting surface structure, cutting edge state; and the packaging mode shall abide by the packaging mode provided by the supplier.6 Dimension, Appearance, WeightThe dimension, appearance, weight and allowable tolerance of steel sheet and strip shall conform to the provisions of GB/T 708.7 Technical Requirements7.1 Chemical compositions The reference values for the chemical compositions (smelting analysis) of steel can refer to Appendix A. If the purchaser has the requirements for the chemical compositions; it shall be negotiated when ordering. Approximate comparison between domestic and foreign standard grades can refer to Appendix B. 7.2 Smelting method The steel used for steel sheet and strip shall be smelted by oxygen converter or electric furnace; unless otherwise specified, the smelting method shall be selected by the supplier. 7.3 Delivery state 7.4 Mechanical properties 7.4.1 The supplier shall guarantee that the mechanical properties (excluding the bake hardening value) of steel sheet and strip shall conform to the provisions of Table 4 within 6 months since the completion date of production. 7.5 Stretcher strain mark Under the storage conditions at room temperature, for the steel sheet and strip with surface requirements of FC and FD, the use of it shall guarantee no stretcher strain mark occur within 3 months since the completion date of production. 7.6 Surface quality 7.6.1 The surface of steel sheet and strip shall be free of defects that are harmful to use, such as scars, cracks, inclusions, etc.; steel sheet and strip shall have no delamination. 7.7 Surface structure The surface structure of steel sheet and strip shall conform to the provisions of Table 6.If the purchaser has special requirements for the roughness, it shall be negotiated when ordering.8 Test Methods8.1 The analysis method for the chemical compositions of steel shall be performed as per the provisions of GB/T 223.5, GB/T 223.9, GB/T 223.16, GB/T 223.40, GB/T 223.59, GB/T 223.64, GB/T 223.86, GB/T 4336, GB/T 20123, GB/T 20125, GB/T 20126 or general method; while the arbitration shall be performed as per the provisions of GB/T 223.5, GB/T 223.9, GB/T 223.16, GB/T 223.40, GB/T 223.59, GB/T 223.64, GB/T 223.86. 8.2 The inspection items and test methods of steel sheet and strip shall conform to the provisions of Table 7. 8.4 The Value r is calculated at 15% strain; when uniform extension is less than 15%, it is calculated by the strain at the end of uniform extension.9 Inspection Rules9.1 The inspection and acceptance of steel sheet and strip shall be performed by the supplier’s Inspection department. 9.2 The steel sheet and strip shall be accepted in batches. Each inspection batch consists of the steel sheet and strip with the same grade, the same specification, the same processing state. 9.3 The sampling quantities and sampling methods of steel sheet and strip shall conform to the provisions of Table 7. 9.4 The reinspection and judgement rules of steel sheet and strip shall conform to the provisions of GB/T 17505.10 Package, Mark and Quality CertificateThe package, mark and quality certificate of steel sheet and strip shall conform to the provisions of GB/T 247. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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