GB 912-2008 PDF EnglishUS$70.00 · In stock · Download in 9 seconds
GB 912-2008: [GB/T 912-2008] Hot-rolled sheets and strips of carbon structural steels and high strength low alloy structural steels Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Obsolete GB 912: Historical versions
Similar standardsGB 912-2008: [GB/T 912-2008] Hot-rolled sheets and strips of carbon structural steels and high strength low alloy structural steels---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/GB912-2008 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.50 H 46 Replacing GB/T 912-1989 Hot-rolled Sheets and Strips of Carbon Structural Steels and High Strength Low Alloy Structural Steels (ISO 4995.2001 (E), ISO 4996.1999 (E) NEQ) Issued on. OCTOBER 24, 2008 Implemented on. OCTOBER 1, 2009 Issued by. General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ); Standardization Administration (SAC) of the People's Republic of China. Table of ContentsForeword... 3 1 Scope... 4 2 Normative References... 4 3 Ordering Information... 6 4 Size, Appearance, Weight and Permissible Deviation... 7 5 Technical Requirements... 7 6 Test Methods... 9 7 Inspection Rules... 9 8 Packing, Marking and Quality Certificate... 9 9 Rounding off of Numerical Values... 10ForewordThis standard is the compulsory-provisions standard; 5.1.2, 5.4.1, 5.4.3 and 8.2 are the compulsory clauses. This standard is not equivalent to "Hot-rolled Steel Sheet of Structural Quality" (ISO 4995.2001 (E)) and "Hot-rolled Steel Sheet of High Yield Stress Structural Quality" (ISO 4996.1999 (E)). This standard replaces "Hot-rolled Sheets and Strips of Carbon Structural Steels and High Strength Low Alloy Structural Steels" (GB/T 912-1989). Compared with GB/T 912-1989, the main changes of this standard are as follows. — Change from voluntary standard to standard with compulsory-provisions; — Delete the content related to ply-rolling steel plate in the former standard; — Adjust the thickness range of products; — Add the "ordering information"; — Change the delivery state; — Modify the requirements of surface quality. This standard was proposed by China Iron and Steel Association. This standard shall be under the jurisdiction of the National Technical Committee on Iron and Steel of Standardization Administration of China. Chief drafting organizations of this standard. Guangdong Entry-Exit Inspection and Quarantine Bureau, Metallurgical Information and Standardization Institute and Benxi Iron & Steel (group) Co. Ltd. Chief drafting staffs of this standard. Li Chengming, Peng Xiaogang, Wang Xaiohu, Zhang Zhenkun, Zhou Qi, Zhang Xianfeng, Liu Jianbin, Cao Biao and Pei Yu. The previous edition replaced by this standard is as follows. — GB/T 912-1989. Hot-rolled Plates and Strips of Carbon Structural Steels and High Strength Low Alloy Structural Steels1 ScopeThis standard specifies the ordering information, size, appearance, weight and permissible deviation, technical requirements, test methods, inspection rules, packing, marking and quality certificate of hot-rolled plates and strips of carbon structural steels and high strength low alloy structural steels. This standard is applicable to hot-rolled plates and strips of carbon structural steels and high strength low alloy structural steels with thickness less than 3 mm.2 Normative ReferencesThe following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to these specifications. GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products GB/T 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy - The Diantipyrylmethane Phosphomolybdate Gravimetric Method for the Determination of Phosphorus Content GB/T 223.5 Steel and Iron - Determination of Acid-soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method GB/T 223.10 Methods for Chemical Analysis of Iron, Steel and Alloy - The Cupferron Separation-chrome Azurol S Photometric Method for the Determination of Aluminium Content3 Ordering Information3.1 The order contract or order according to this standard shall include the following contents.4 Size, Appearance, Weight and Permissible DeviationThe size, shape, weight and permissible deviation for steel plate, sheet and strip shall meet the requirements of GB/T 709.5 Technical Requirements5.1 Designation and chemical composition 5.1.1 The designation and chemical composition of steel shall meet the requirements specified in GB/T 700 and GB/T 1591. 5.2 Smelting process By converter or electro-smelting. 5.3 Delivery condition The steel plate and strip shall be delivered with hot rolling or annealed condition. 5.4 Mechanical property and processing property 5.4.1 Tensile strength and elongation percentage of steel sheet and strip shall meet the requirements of GB/T 700 and GB/T 1591, but the elongation percentage is permitted to be 5 % less (absolute value) than that specified in GB/T 700 or GB/T 1591. 5.5 Surface quality 5.5.1 Harmful defects, such as the scar, crack, fold, inclusion, bubble and embed iron-oxide-scale, shall be free from the surface of the steel sheet and strip. Steel sheet and strip shall be free from any delaminate. 5.5.2 Local defects, such as iron oxide scale in thin layer, corrosion and slight pockmark, which do not affect using, are allowed to exist on the surface of the steel sheet and strip. The convex-concave shall not exceed half of the thickness deviation of the steel sheet and strip, and the permitted minimum thickness of steel sheet and strip shall be ensured.6 Test Methods6.1 The inspection items, sampling quantity, sampling method and test method of each batch of steel sheet and strip shall meet the requirements specified in Table 1.7 Inspection Rules7.1 The inspection and acceptance of steel sheet and strip are in charge of the supplier's technology and quality supervision department. The purchaser is entitled to perform inspection and acceptance according to any inspection item specified in this standard or contract. 7.4 The re-inspection and judgment of steel sheet and strip shall be carried out in accordance with the requirements of GB/T 17505.8 Packing, Marking and Quality Certificate8.1 Packing, marking and quality certificate of steel sheet and strip shall meet the requirements of GB/T 247.The type of the quality certificate may be according to the requirements of GB/T 18253.9 Rounding off of Numerical ValuesRounding off of numerical values shall meet the requirements of YB/T 081. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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