GB/T 714-2015 PDF in English
GB/T 714-2015 (GB/T714-2015, GBT 714-2015, GBT714-2015)
Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
GB/T 714-2015 | English | 85 |
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Structural steel for bridge
| Valid |
GB/T 714-2008 | English | 479 |
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Structural steel for bridge
| Obsolete |
GB/T 714-2000 | English | 399 |
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Structural steel for bridge
| Obsolete |
GB/T 714-1965 | English | RFQ |
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Technical requirements for hot-rolled carbon steels for bridges
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Standards related to (historical): GB/T 714-2015
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GB/T 714-2015: PDF in English (GBT 714-2015) GB/T 714-2015
ICS 77.140.50
H 46
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Replacing GB/T 714-2008
Structural steel for bridge
ISSUED ON. SEPTEMBER 11, 2015
IMPLEMENTED ON. JUNE 01, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 8
4 Designation presentation method ... 8
5 Order content ... 9
6 Size, shape, mass and allowable deviation ... 10
7 Technical requirements ... 10
8 Test methods ... 17
9 Inspection rules ... 18
10 Packaging, marking and quality certificate ... 19
APPENDIX A (Informative) Designation comparison of relevant standard ... 20
APPENDIX B (Informative) Recommended yield strength ratio of steel ... 21
Appendix C (Informative) Guidance for the assessment of atmospheric
corrosion resistance of weathering bridge steels ... 22
Foreword
This standard was drafted in accordance with the rules given in GB/T
1.1-2009.
This standard replaces GB/T 714-2008 “Structural steel for bridge”. As
compared with GB/T 714-2008, the main technical changes are as follows.
- INCREASE the thickness range to 150 mm;
- ADD the terms and definitions (SEE Chapter 3);
- CANCEL the Q235q steel designation (SEE 2008 version);
- Based on the different delivery status, respectively SPECIFY the chemical
compositions of the steel of different designations;
- CONTROL stricter the P, S and N element in the chemical composition,
and ADD the requirements of H element (SEE Table 1 ~ Table 5);
- ADD the technical requirements for the quality class F of Q420q and
above designation steel (SEE Table 1, Table 3, Table 4, Table 5, Table
8);
- CHANGE the defective part of the strip which shall not exceed 8% of the
total length of each coil of strip into not exceeding 6%;
- ADD the yield strength ratio of the recommended steels in Appendix B
(informative);
- ADD Appendix C (informative) for the guidance of the weathering
resistance assessment for bridge steels.
This standard was proposed by China Iron and Steel Association.
This standard shall be under the jurisdiction of National Steel Standardization
Technical Committee (SAC/TC 183).
The main drafting organizations of this standard. Anshan Iron and Steel Group
Corporation, Metallurgical Industry Information Standards Research Institute,
Tianjin Iron and Steel Group Co., Ltd., Xinyu Iron and Steel Co., Ltd., Jiangsu
Shagang Group Co., Ltd., Nanyang Hanye Special Steel Co., Ltd., Hunan Valin
Xiangtan Iron & (Group) Co., Ltd., Fujian Sanming Iron and Steel Group Co.,
Ltd., Hebei Iron and Steel Co., Ltd. Handan Branch, Wuhan Iron and Steel Co.,
Ltd., Shougang Corporation.
Structural steel for bridges
1 Scope
This standard specifies the terms and definitions, the designation presentation
methods, the order content, dimensions, shape, mass and allowable
tolerances, technical requirements, test methods, inspection rules, packaging,
marking and quality certificates of the structural steel for bridge.
This standard is applicable to the structural steel sheets of the thickness not
more than 150 mm, the structural steel strips and shear steel sheets of the
thickness not more than 25.4 mm for bridges, AND the structural steel of the
thickness not more than 40 mm for bridges.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable 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 molybdo-silicate spectrophotometric 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 223.19 Methods for chemical analysis of iron, steel and alloy - The
neocuproin-hydrochlorid monnohydrat trichloromethane extraction
photometric method for the determination of copper content;
GB/T 223.23 Iron and steel alloys - Determination of nickel content – The
dimethylglyoxime spectrophotometric method;
GB/T 223.26 Iron, steel and alloy - Determination of molybdenum content –
The thiocyanate 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 periodate (potassium) photometric method for the determination of
manganese content;
GB/T 223.64 Iron, steel and alloy - Determination of manganese content -
Flame atomic absorption spectrometric method;
GB/T 223.72 Steel and alloy - Determination of sulfur content - Gravimetric
method;
GB/T 223.78 Methods for chemical analysis of iron, steel and alloy -
Curcumin spectrophotometric method for the determination of boron
content;
GB/T 223.79 Iron and steel - Determination of multi-element content - X-ray
fluorescence spectrometry (Routine method);
GB/T 223.81 Iron, steel and alloy - Determination of total aluminium and
total boron contents - Microwave digestion-inductively coupled plasma
mass spectrometric method;
GB/T 223.82 Steel and iron - Determination of hydrogen content - Inert gas
pulse fusion heat conductivity method;
GB/T 223.84 Steel and iron - Determination of titanium content -
Diantipyrylmethane spectrophotometric method;
GB/T 223.85 Steel and iron - Determination of sulfur content - Infrared
absorption method after combustion in induction furnace;
GB/T 223.86 Steel and iron - Determination of total carbon content - Infrared
absorption method after combustion in induction furnaces;
GB/T 228.1 Metallic materials - Tensile testing - Part 1. Method of test at
room temperature;
GB/T 229 Metallic materials - Charpy pendulum impact test method;
GB/T 232 Metallic materials - Bend test;
GB/T 247 General rules of acceptance, package, mark and certification for
steel sheets and strips;
GB/T 706 Hot rolled section steel;
GB/T 709 Dimension, shape, weight and tolerances for hot rolled sheets
and strips;
GB/T 2101 General requirements of acceptance packaging marking and
certification for section steel;
GB/T 2970 Method for ultrasonic testing of thicker steel plates
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 - Spark discharge atomic emission spectrometric method (Routine
method);
GB/T 5313 Steel plates with through-thickness characteristics;
GB/T 8170 Rules for rounding off for numerical values & expression and
judgement of limiting values;
GB/T 11263 Hot-rolled H and cut T section steel;
GB/T 14977 General requirements for surface condition of hot-rolled steel
plates;
GB/T 17505 Steel and steel products - General technical delivery
requirements;
GB/T 20066 Steel and iron - Sampling and preparation of samples for the
determination of chemical composition;
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 20124 Steel and iron - Determination of nitrogen content - Thermal
conductimetric method after fusion in a current of inert gas (Routine
method);
GB/T 20125 Low-alloy steel - Determination of multi-element contents -
Inductively coupled plasma atomic emission spectrometric method;
first letter of the Chinese phonetic alphabet of the bridge character, the quality
grade symbol, and so on.
Example. Q420qD. Wherein.
Q - The first letter of the Chinese phonetic alphabet “qu” of the yield strength
of bridge steel [Translator note. “qu” represents “yield strength”];
420 - The specified minimum yield strength value, in the unit of MPa;
q - The first letter of the Chinese phonetic alphabet “qiao” of the bridge steel
[Translator note. “qiao” represents “bridge”];;
D - The quality grade is D.
As for the grade D steel sheet which is delivered in thermo-mechanical rolling
state, if it has the weather resistance and thickness direction properties, then
after the aforementioned designation, respectively ADD the performance level
code of the weather resistance (NH) and the thickness direction (Z direction).
Example. Q420qDNHZ15.
5 Order conten...
...... Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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