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GB 712-2011 (GB/T 712-2022 Newer Version) PDF English


GB 712-2011 (GB712-2011) PDF English
Standard IDContents [version]USDSTEP2[PDF] delivered inName of Chinese StandardStatus
GB/T 712-2022English395 Add to Cart 0-9 seconds. Auto-delivery. Structural steel for ship and ocean engineering Valid
GB 712-2011English85 Add to Cart 0-9 seconds. Auto-delivery. [GB/T 712-2011] Ship and ocean engineering structural steel Obsolete
GB 712-2000English399 Add to Cart 3 days Hull structural steel Obsolete
GB 712-1988EnglishRFQ ASK 3 days Hull structural steel Obsolete
Newer version: GB/T 712-2022     Standards related to (historical): GB/T 712-2022
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GB 712-2011: PDF in English

GB 712-2011 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.50 H 46 Replacing GB 712-2000 Ship and Ocean Engineering Structural Steel ISSUED ON. JUNE 16, 2011 IMPLEMENTED ON. FEBRUARY 1, 2012 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of the People's Republic of China. 3. No action is required - Full-copy of this standard will be automatically & immediately delivered to your EMAIL address in 0~60 minutes. Table of Contents Foreword ... 3  1 Application Scope ... 5  2 Normative References ... 5  3 Classification and Designations ... 7  4 Ordering Content ... 8  5 Dimensions, Shapes, Weights and Tolerances ... 8  6 Requirements ... 8  7 Inspection and Test ... 13  8 Packaging, Marking and Quality Certification ... 16  9 Rounding-off of Numerical Values ... 16  Annex A (Normative) Designations, Delivery Conditions and Impact Test Batches of Steels ... 17  Annex B (Informative) ... 20  Table of Correspondence of All Grades and Designations of Steels Used for Hull Specified in the Rules of All Classification Societies ... 20  Foreword Articles 2, 3 and 4, 6.6.2 and Annex B of this Standard are voluntary; the others are compulsory. This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. In this Standard, GB 712-2000, Hull Structural Steel, was revised by referring to the rule of China Classification Society (CCS), Rules for Materials and Welding. GB 712-2000, Hull Structural Steel, is abolished from the date of the implementation of this Standard. Compared with GB 712-2000, the major changes of this Standard are as follows. -- the standard name is modified; -- the ordering content is added; -- 24 designations of 6 steel grades and two grades of Z25 and Z35 of Z-direction steel are added; -- the harmful elements such as P and S in steels are under strict control; -- the chemical compositions and mechanical properties of 24 designations of high strength and super strength steel grades are added; -- the provision on the surface quality repair-grinding area is added; -- the allowable abnormal part of the surface quality of steel strips is reduced to 6%; -- the Article of “Rounding-off of Numerical Values” is added; -- Annex A (Designations, Delivery Conditions and Impact Test Batches) and Annex B (Table of Correspondence of All Grades and Designations of Steels Used for Hull Specified in the Rules of All Classification Societies) are added. Annex A of this Standard is normative; Annex B is informative. This Standard was proposed by China Iron and Steel Association. This Standard shall be under the jurisdiction of the National Standardization Technical Committee on Steels. The drafting organizations of this Standard. Ansteel Co., Ltd., China Metallurgical Information and Standardization Institute, Chongqing Iron and Steel Co., Ltd., Xinyu Iron and Steel Group Co., Ltd., Tianjin Iron and Steel Group Co., Ltd., Nanjing Iron and Steel Co., Ltd., Xiangtan Iron and Steel Co., Ltd. of Hunan Valin, Jiangsu Shagang Group Co., Ltd., Shugang Group, Hunan Valin LY STEEL Co., Ltd., China Ship and Ocean Engineering Structural Steel 1 Application Scope This Standard specifies the classification and designations, ordering content, dimensions, shapes, weights and tolerances, requirements, inspection and test, and packaging, marking and quality certification of ship and ocean engineering structural steel. This Standard applies to steel plates of thickness not greater than 150 mm, steel strips and shear plates of thickness not greater than 25.4 mm and profile steels of thickness or diameter not greater than 50 mm (hereinafter referred to as steels), which are used to manufacture the ships of ocean, coastal and inland water voyages, fishing boats and ocean engineering structures. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to this Standard. GB/T 222, Permissible Tolerances for Chemical Composition of Steel Products 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 Aluminium Content – Chrom Azurol S Photometric Method GB/T 223.12, Methods for Chemical Analysis of Iron, Steel and Alloy – The Sodium Carbonate Separation-Diphenyl Carbazide Photometric Method for the Determination of Chromium Content GB/T 223.14, Methods for Chemical Analysis of Iron, Steel and Alloy – The N- Benzoy-N-Phenylhydroxylamine Extraction Photometric Method for the Determination of Vanadium Content 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 223.19, Methods for Chemical Analysis of Iron Steel and Alloy – The Neocuproine-Chloroform Extraction Photometric Method for the Determination of Copper Content GB/T 223.23, Iron, Steel and Alloy – Determination of Nickel Content – The Dimethylglyoxime Spectrophotometric Method GB/T 223.25, Methods for Chemical Analysis of Iron, Steel and Alloy – The Dimethylglyoxime Gravimetric Method for the Determination of Nickel Content GB/T 223.26, Iron, Steel and Alloy – Determination of Molybdenum Content – The Thiocyanate Spectrophotometric Method GB/T 223.37, Methods for Chemical Analysis of Iron, Steel and Alloy – The Indophenol Blue Photometric Method for the Determination of Nitrogen Content after Distillation Separation GB/T 223.40, Iron, Steel and Alloy – Determination of Niobium Content by the Sulphochlorophenol S Spectrophotometric Method GB/T 223.62, Methods for Chemical Analysis of Iron, Steel and Alloy – The Butyl Acetate Extraction Photometric Method for the Determination of Phosphorus Content GB/T 223.63, Methods for Chemical Analysis of Iron, Steel and Alloy – The Sodium (Potassium) Periodate Photometric Method for the Determination of Manganese Content GB/T 223.67, Iron, Steel and Alloy – Determination of Sulfur Content – Methylene Blue Spectrophotometric Method GB/T 223.69, Iron, Steel and Alloy – Determination of Carbon Contents – Gas- volumetric Method after Combustion in the Pipe Furnace GB/T 228.1, Metallic Materials – Tensile Testing – Part 1. Method of Test at Room Temperature (GB/T 228.1-2011, ISO 6892-1.2009, MOD) GB/T 229, Metallic Materials – Charpy Pendulum Impact Test Method GB/T 247, General Rule of Package, Mark and Certification for Steel Plates (Sheets) and Strips GB/T 709, Dimensions, Shape, Weight and Tolerances for Hot Rolled Steel Sheets and Strips GB/T 2101, General Requirement of Acceptance, Packaging, Marking and Certification for Section Steel GB/T 2970, Thick Steel Plates - Method for Ultrasonic Inspection GB/T 2975, Steel and Steel Products – Location and Preparation of Test Pieces for Mechanical Testing GB/T 4336, Carbon and Low-alloy Steel – Determination of Multi-element Contents 4 Ordering Content 4.1 The contract or order placed in accordance with this Standard shall include the following content. a) a reference to this Standard; b) designation; c) specification; d) weight; e) dimensions and accuracy of dimensions and shapes; f) delivery condition; g) marking; h) special requirements. 4.2 When the content of e) ~ g) is not specified in the ordering contract, it may be decided by the supplier. 5 Dimensions, Shapes, Weights and Tolerances The dimensions, shapes, weights and tolerances of tinplate shall be as specified in GB/T 709; and the lower deviation of thickness is -0.30 mm. The dimensions, shapes, weights and tolerances of profile steels shall be as specified in relevant standards. 6 Requirements 6.1 Designations and chemical compositions 6.1.1 The designations and chemical compositions (ladle analysis) of steels of general strength and high strength shall be as specified in Table 2. The carbon equivalent maximum value of steels of high strength delivered under the condition of TMCP shall be as specified in Table 3. 6.1.2 The designations and chemical compositions (ladle analysis) of steels of super strength shall be as specified in Table 4. 6.1.3 The tolerances for the chemical compositions of steels shall be as specified in GB/T 222. thickness direction of Z-direction steel 5 Ultrasonic flaw detection testing Per sheet - GB/T 2970 6 Surface quality Per sheet/per pcs - Visual inspection and measurement 7 Dimensions, shape ... ......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.