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GB/T 711-2008 English PDF (GBT711-2008)

GB/T 711-2008 English PDF (GBT711-2008)

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GB/T 711-2008: Hot-rolled quality carbon structural steel plates, sheets and wide strips

This Standard specifies the dimension, shape, weight, allowable deviation, technical requirements, test method, test rules, packing, mark, and quality certificate of hot-rolled quality carbon structural steel plates, sheets and wide strips. This Standard is applicable to the hot-rolled quality carbon structural steel plates, sheets and wide strips of which the thickness is 3mm~60mm and the width is not less than 600mm.
GB/T 711-2008
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.50
H 46
Replacing GB/T 711-1988
Hot-rolled Quality Carbon Structural Steel
Plates, Sheets and Wide Strips
ISSUED ON. OCTOBER 10, 2008
IMPLEMENTED ON. MAY 1, 2009
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the PEOPLE Republic of China;
Standardization Administration of the People's Republic of China
(SAC).
Table of Contents
Foreword ... 3
1. Scope ... 4
2. Normative references ... 4
3. Order content ... 7
4. Dimension, shape, weight and allowable deviation ... 7
5. Technical requirements ... 7
6. Test method ... 12
7. Inspection rules ... 13
8. packaging, marking and quality certificate ... 13
9. Rounding-off of numerical value ... 13
Foreword
This Standard replaces GB/T 711-1988 "Hot-rolled Quality Carbon Structural Steel Plates, Sheets and Wide Strips".
Compared with GB/T 711-1988, the main changes in this standard are as follows. - Change the provisions on delivery state;
- The sulfur content is reduced by 0.005%;
- The impact test is changed from transverse direction to longitudinal direction; and the impact absorbed energy value is increased;
- The inspection batch weight is increased to 60t.
This Standard was proposed by China Iron and Steel Association.
This Standard shall be under jurisdiction of China Steel Standardization Technical Committee.
Chief drafting organizations of this Standard. Chongqing Iron and Steel Company Limited, Tianjin Iron and Steel Co., Ltd., Shougang Corporation, Angang Steel Company Limited, and China Metallurgical Information And Standardization Research Institute. Chief drafting staffs of this Standard. Zhu Bin, Zeng Xiaoping, Yuan Jianhua, Li Shuqing, Du Dasong, Shi Li, Guan Jichun, Su Yan, and Wang Xiaohu.
The previous versions replace by this Standard are as follows.
- GB/T 711-1985, and GB/T 711-1988.
Hot-rolled Quality Carbon Structural Steel Plates,
Sheets and Wide Strips
1. Scope
This Standard specifies the dimension, shape, weight, allowable deviation, technical requirements, test method, test rules, packing, mark, and quality certificate of hot-rolled quality carbon structural steel plates, sheets and wide strips. This Standard is applicable to the hot-rolled quality carbon structural steel plates, sheets and wide strips of which the thickness is 3mm~60mm and the width is not less than 600mm.
2. Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this Standard. For dated reference, the subsequent amendments (excluding corrigendum) or revisions of these publications do not apply. However, the parties who enter into agreement based on this Standard are encouraged to study whether the latest editions of these references are applicable. For undated references, the latest edition of the normative document is applicable to this Standard.
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 223.9 "Iron Steel and Alloy - Determination of Aluminum Content - Chrom Azurol S Photometric Method"
GB/T 223.11 "Iron Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration 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 223.18 "Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium Thiosulfate Separation Iodimetric Method for the Determination of Copper 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 223.36 "Methods for Chemical Analysis of Iron, Steel and Alloy - The Neutral Titration Method for the Determination of Nitrogen Content after Distillation Separation"
GB/T 223.37 "Methods for Chemical Analysis of Iron Steel and Alloy - The Indophenal Blue Photometric Methods for the Determination of Nitrogen Content after Distillation Separation"
GB/T 223.59 "Iron Steel and Alloy - Determination of Phosphorus Content - Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony
Phosphomolybdate Blue Spectrophotometric Method"
GB/T 223.60 "Methods for Chemical Analysis of Iron, Steel and Alloy - The Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon Content"
GB/T 223.61 "Methods for Chemical Analysis of Iron, Steel and Alloy - The Ammonium Phosphomolybdate Volumetric Method for the Determination of
Phosphorus Content"
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 223.64 "Iron Steel and Alloyed - Determination of Manganese Content - Flame Atomic Absorption Spectrometric Me 223.64thod"
GB/T 223.67 "Iron Steel and Alloy - Determination of Sulfur Content - Methylene Blue Spectrophotometric Method"
GB/T 223.68 " Methods for Chemical Analysis of Iron, steel and Alloy - The Potassium Iodate Titration Method after Combustion in the Pipe Furnace for the Determination of Sulfur Content"
GB/T 222 "Permissible Tolerances for Chemical Composition of Steel Products" GB/T 224 "Determination of Depth of Decarburization of Steels"
GB/T 226 "Etch Test for Macrostructure and Defect of Steels"
GB/T 228 "Metallic Materials - Tensile Testing at Ambient Temperature" (GB/T 228-2002.eqv ISO 6892. 1998)
GB/T 229 "Metallic Materials - Charpy Pendulum Impact Test Method" (GB/T 229-2007, ISO 148.2006, MOD)
GB/T 232 "Metallic Materials - Bend Test" (GB/T 232-1999, eqv ISO 7438.1985) GB/T 247 ?€?General Rule of Acceptance, Package, Mark and Certification for Steel Plates, Sheets and Strips?€?
GB/T 709 ?€?Dimension, Shape, Weight and Tolerances for Hot Rolled Sheets and Plates?€?
GB/T 2970 ?€?Thicker Steel Plates - Method for Ultrasonic Inspection?€?
GB/T 2975 "Steel and Steel Products - Location and Preparation of Test Pieces for Mechanical Testing" (GB/T 2975-1998, eqv 377. 1997)
GB/T 4336 "Standard Test Method for Spark Discharge Atomic Emission
Spectrometric Analysis of Carbon and Low-alloy Steel (routine Method)"
GB/T 17505 "Steel and Steel Products - General Technical Delivery Requirements" (GB/T 17505-1998, eqv ISO 404. 1992)
GB/T 20066 "Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition" (GB/T 20066-2006, ISO 14284. 1996, IDT)
GB/T 20123 "Steel and Iron - Determination of Total Carbon and Sulfur Content - Infrared Absorption Method after Combustion in an Induction Furnace (routine Method)" (GB/T 20123-2006, ISO 15350. 2000, IDT)
GB/T 20125 "Low-alloy Steel - Determination of Multi-element Contents - Inductively Coupled Plasma Atomic Emission Spectrometric Method"
YB/T 081 "Rule for Rounding off of Numerical Values and Judgment of Testing Values for Technical Standards of Metallurgy"
5.4 Mechanical property
5.4.1 Mechanical property of steel plates (sheets) and steel strips shall comply with requirements in Table 2. Each property of 08Al steel shall comply with requirements of 08 steel plates (sheets) and steel strips; cold bending experiment of No. 08~35 steel shall comply with requirements in Table 3, if the quality can be guaranteed by the supplier, test may be exempted.
5.4.1.1 For steel plate delivered in the heat treatment condition, if the elongation rate is increased more than 2% (absolute value) of Table 2, tensile strength is allowed to be lowered by 40N/mm2 than the provisions in Table 2.
5.4.1.2 When the thickness of steel plates (sheets) and steel strips is greater than 20mm, if the thickness incremented by 1mm, then the elongation rate can be reduced by 0.25% (absolute value); if the thickness ???32mm, total reduced value shall not be greater than 2% (absolute value); if the thickness >32mm, total reduced value shall not be greater than 3% (absolute value).
5.4.2 If both parties agree, 20??C or -20??C low-temperature impact test can be proceeded on steel products whose thickness is not less than 6mm; the impact force of 10, 15 and 20 steel plate shall comply with requirements in Table 4; test temperature shall be indicated in the contract. Test temperature and impact absorpti...

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