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GB/T 3274-2007 English PDF (GBT3274-2007)

GB/T 3274-2007 English PDF (GBT3274-2007)

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GB/T 3274-2007: Hot-rolled plates and strips of carbon structural steels and high strength low alloy structural steels

This Standard specifies the content, size, form, weight, permissible tolerance, technical conditions, experiment, inspection rules, packaging, mark and quality certificate of hot-rolled steel plate and strip of carbon structural steel and low-alloy structural steel.
GB/T 3274-2007
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.50
H 46
Replacing GB/T 3274-1988
Hot-rolled Plates and Strips of Carbon Structural
Steels and High Strength Low Alloy Structural Steels
ISSUE ON. AUGUST 14, 2007
IMPLEMENTED ON. MARCH 1, 2008
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People's Republic of China (GAQSIQ);
Standardization Administration of the People's Republic of
China (SAC).
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Purchasing Content ... 7
4 The Size, Shape, Weight and Permissible Tolerance ... 8
5 Technical Requirements ... 8
6 Test Methods ... 9
7 Inspection Rules ... 10
8 Packaging, Mark and Quality Certificate ... 10
9 Rounding-off of Values ... 10
Foreword
This Standard is not equivalent to ISO 630.1995 ?€?Structural Steel and ISO 13976.2005 Hot-rolled Steel Sheet in Coils of Structural Quality and Heavy Thickness?€?.
This Standard replaces GB/T 3274-1998 ?€?Hot-rolled Plates and Strips of
Carbon Structural Steels and High Strength Low Alloy Structural Steels?€?. Compared with the previous standard, the main changes are as follows.
- GB/T 14977 and GB/T 18253 are supplemented into the normative
reference;
- Ordering content is supplemented;
- Provisions of surface quality are modified;
- Provisions of weld repair are supplemented;
- Group-batch provisions are modified.
This Standard was proposed by China Iron and Steel Association.
This Standard shall be under the jurisdiction of National Technical
Standardization Committee.
Main drafting organizations of this Standard. Angang Steel Company Limited, Tianjin Iron and Steel Co., Ltd., China Metallurgical Information Standardization Institute AND Jinan Iron and Steel Co., Ltd.
Main drafters of this Standard. Liu Xuyuan, Wang Xiaohu, Xu Keliang, Pu Zhimin, Wu Bo, Sun Genling and Tang Yifan.
This standard was first-time issued in 1988.
Hot-rolled Plates and Strips of Carbon Structural
Steels and High Strength Low Alloy Structural Steels
1 Scope
This Standard specifies the content, size, form, weight, permissible tolerance, technical conditions, experiment, inspection rules, packaging, mark and quality certificate of hot-rolled steel plate and strip of carbon structural steel and low-alloy structural steel.
This Standard is applicable to 3mm ~ 400mm thick hot-rolled steel plate or 3mm ~ 25.4mm thick hot-rolled steel strip of carbon structural steel and low-alloy structural steel.
2 Normative??References
The following standards contain the provisions which, through reference in this text, constitute the provisions of this Standard. As for the dated reference, the subsequent amendments (excluding corrigendum) or revisions of these
publications do not apply. For undated references, the latest edition of the normative document referred to applies.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel
Products
GB/T 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy -
Diantipyrylmethane Phosphomolybdate Gravimetric Method - Determination
of Phosphorus Content
GB/T 223.5 Methods for Chemical Analysis of Iron, Steel and Alloy -
Reduced Molybdosilicate Spectrophotometric Method - Determination of
Acid-soluble Silicon Content
GB/T 223.10 Methods for Chemical Analysis of Iron, steel and Alloy -
Cupferron Separation-chrome Azurol S Phot
GB/T 223.11 Methods for Chemical Analysis of Iron, Steel and Alloy -
Ammonium Persulfate Oxidation Volumetric
GB/T 223.14 Methods for Chemical Analysis of Iron, steel and Alloy -
N-benzoyl-n-phenylhydroxylamine Extraction
GB/T 223.17 Methods for Chemical Analysis of Iron, Steel and Alloy -
Diantipyrylmethane Photometric Method - Determination of Titanium
Content
GB/T 223.18 Methods for Chemical Analysis of Iron Steel and Alloy -
Sodium Thiosulfate Separation Iodimetric Method - Determination of
Cupper Content
GB/T 223.19 Methods for Chemical Analysis of Iron, Steel and Alloy -
Neocuproine-chloroform Extraction Photometric Method - Determination of Copper Content
GB/T 223.23 Methods for Chemical Analysis of Iron, Steel and Alloy-
Dimethylglyoxime Spectrophotometric Method - Determination of Nickel
Content
GB/T 223.24 Methods for Chemical Analysis of Iron, steel and Alloy -
Extraction Separation - Dimethylglyoxime Spectrophotometric Method -
Determination of Nickel Content
GB/T 223.32 Methods for Chemical Analysis of Iron, Steel and Alloy -
Hypophosphite Reduction-iodimetric Method - Determination of Arsenic
Content
GB/T 223.37 Methods for Chemical Analysis of Iron, steel and Alloy -
Indophenol Blue Photometric Methods - Determination of Nitrogen Content after Distillation Separation
GB/T 223.40 Methods for Chemical Analysis of Iron, steel and Alloy -
Anion-exchange Separation-sulphochlorophenol S Photometric Method -
Determination of Niobium Content
GB/T 223.58 Methods for Chemical Analysis of Iron, steel and Alloy -
Sodium Arsenite-sodium Nitrite Titrimetric Method - Determination of
Manganese Content
GB/T 223.59 Methods for Chemical Analysis of Iron, steel and Alloy -
Reduced Molybdoantimonyl Phosphoric Acid Photometric Method -
Determination of Phosphorus Content
GB/T 223.60 Methods for Chemical Analysis of Iron, Steel and Alloy -
Perchloric Acid Dehydration Gravimetric Method - Determination of Silicon Content
GB/T 223.63 Methods for Chemical Analysis of Iron, Steel and Alloy -
Sodium (potassium) Periodate Photometric Method - Determination of
Manganese Content
GB/T 223.64 Methods for Chemical Analysis of Iron, Steel and Alloy - Flame Atomic Absorption Spectrometric Method - Determination of Manganese
Content
GB/T 223.68 Methods for Chemical Analysis of Iron, Steel and Alloy -
Potassium Iodate Titration Method after Combustion in the Pipe Furnace - Determination of Sulfur Content
GB/T 223.71 Methods for Chemical Analysis of Iron, Steel and Alloy -
Gravimetric Method after Combustion in the Pipe Furnace - Determination of Carbon Content
GB/T 223.72 Methods for Chemical Analysis of Iron, Steel and Alloy -
Alumina Chromatographic Separation-barium Sulfate Gravimetric Method -
Determination of Sulphur Content
GB/T 228 Points of the Testing Method Used for Metal Materials in
Compression at Ambient Temperature (GB/T 228-2002, eqv ISO
6892.1998)
GB/T 229 Metallic Materials-charpy Notch Impact Test (GB/T 229-1994, eqv ISO 83.1976, eqv ISO 148.1983)
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 700 Carbon Structural Steels
GB/T 709 Dimensions, Shape, Weight and Tolerances for Hot-rolled Plates and Sheets
GB/T 1591 High Strength Low Alloy Structural Steels
GB/T 2975 Steel and Steel Products - Location and Preparation of Test
Pieces for Mechanical Testing (GB/T 2975-1998, eqv ISO377.1997)
GB/T 4336 Method for Photoelectric Emission Spectroscopic Analysis of
Carbon Steel Medium and Low Alloy Steel (Routine method)
GB/T 14977 General Requirement of Surface Finish for Hot Rolled Steel
Plates
GB/T 17505 Steel and Steel Products General Technical Delivery
Requirements (GB/T 17050-1998, eqv ISO 404.1992)
6.2 The surface quality of steel plate and steel strip can be inspected with naked eye.
7 Inspection??Rules
7.1 The steel plate and steel strip can be checked or confirmed by the
supplier's quality supervision department; the purchaser is entitled to implement the inspection and acceptance according to this Standard
provisions and the contract?€?s clauses.
7.2 The steel plate and steel strip shall be accepted in batch; each batch is composed of those steel plates and steel strips with same-designation,
same-furnace number, same-quality grade and same-delivery condition; each batch weight shall not exceed 60t. For those steel plate and steel strip roller with weight over 30t, they can be rolled into two batches of steel products. 7.3 If the minimum thickness in the same-steel plate batch exceeds 10mm, then the thickness difference of these steel plates shall not be more than 5mm; if the minimum thickness in the same-steel plate batch doesn't exceed 10 mm, then the thickness difference of these steel plates shall not be more than 2 mm. The sampling shall be conducted at the thickest steel plate of same-batch. 7.4 For mixed batch that is composed of steel plate and steel strip, which are smelt in smaller nominal-capacity furnace, it shall comply with relevant provisions in GB/T 700 and GB/T 1591.
7.5 The re-inspection and judgment of steel plate and steel strip shall comply with the provisions of GB/T 17505.
8 Packaging,??Mark??and??Quality??Certificate
The steel plate and steel strip?€?s packaging, mark and quality certificate shall comply with the provisions of GB/T 247. The steel plate and steel strip?€?s quality certificate can be in accordance with GB/T 18253.
9 Rounding?€?off??of??Values
Rounding off of values shall comply with the provisions of YB/T 081.

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