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GB 712-2011

GB 712-2011_English: PDF (GB712-2011)
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GB 712-2011English85 Add to Cart 0--10 minutes. Auto-delivered. [GB/T 712-2011] Ship and ocean engineering structural steel GB 712-2011 Valid GB 712-2011
 

BASIC DATA
Standard ID GB 712-2011 (GB712-2011)
Description (Translated English) [GB/T 712-2011] Ship and ocean engineering structural steel
Sector / Industry National Standard
Classification of Chinese Standard H46
Classification of International Standard 77.140.50
Word Count Estimation 17,166
Date of Issue 2011-06-16
Date of Implementation 2012-02-01
Older Standard (superseded by this standard) GB 712-2000
Quoted Standard GB/T 20066; GB/T 20123; GB/T 20124; GB/T 20125; YB/T 081; GB/T 222; GB/T 223.5; GB/T 223.9; GB/T 223.12; GB/T 223.14; GB/T 223.16; GB/T 223.19; GB/T 223.23; GB/T 223.25; GB/T 223.26; GB/T 223.37; GB/T 223.40; GB/T 223.62; GB/T 223.63; GB/T 223.67; GB/T 223.69; GB/T 228.1; GB/T 229; GB/T 247; GB/T 709; GB/T 2101; GB/T 2970; GB/T 2975; GB/T 4336; GB/T 5313; GB/T 17505
Drafting Organization Angang Steel Company Limited
Administrative Organization National Steel Standardization Technical Committee
Regulation (derived from) Announcement of Newly Approved National Standards No. 9 of 2011
Proposing organization China Iron and Steel Association
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This Chinese standard specifies the ship and marine engineering classification and structural steel grades, order contents, size, shape, weight and tolerances, requirements, inspection and testing, packaging, marking and quality certification. This standard applies to manufacture offshore, coastal and river trade area sailing ships, fishing vessels and marine engineering structures with a thickness of not more than 150mm of steel, the thickness is not greater than 25. 4mm and thickness of the strip and the clipboard or diameter of not more than 50mm of steel (hereinafter referred to as steel).

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 ...