GB/T 19879-2023 PDF English
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| GB/T 19879-2023 | English | 245 |
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Steel Plate for building structure
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| GB/T 19879-2015 | English | 135 |
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Steel plate for building structure
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| GB/T 19879-2005 | English | 359 |
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Steel plates for building structure
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GB/T 19879-2023: Steel Plate for building structure---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT19879-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
CCS H 46
Replacing GB/T 19879-2015
Steel Plate for Building Structure
Issued on. SEPTEMBER 7, 2023
Implemented on. APRIL 1, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 7
4 Designation Expression Method... 7
5 Ordering Contents... 8
6 Size, Shape, and Weight... 8
7 Technical Requirements... 9
8 Test Methods... 15
9 Inspection Rules... 16
10 Packaging, Marking and Quality Certificate... 17
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This Document replaced GB/T 19879-2015 Steel Plates for Building Structure. Compared with
GB/T 19879-2015, the major technical changes of this Document besides the structural
adjustments and editorial modifications are as follows.
a) Change the thickness range of steel applicable for building structures (see Clause 1 of this
Edition; Clause 1 of the 2015 Edition);
b) Change the requirements for steel designation and chemical composition (see 7.1 of this
Edition; 6.1 of the 2015 Edition);
c) Change the mechanical properties and process properties of the steel plate (see 7.4 of this
Edition; 6.4 of the 2015 Edition)
d) Change the requirements for welding repair of steel plates (see 7.5.3 of this Edition; 6.5.3
of the 2015 Edition);
e) Change the requirements for ultrasonic test of steel plates (see 7.6 of this Edition; 6.6 of
the 2015 Edition);
f) Add requirements for tensile test specimens (see footnote a of Table 7 of this Edition).
Please note some contents of this Document may involve patents. The issuing agency of this
Document shall not assume the responsibility to identify these patents.
This Document was proposed by China Iron and Steel Association.
This Document shall be under the jurisdiction of National Technical Committee on Steels of
Standardization Administration of China (SAC/TC 183).
Drafting organizations of this Document. Wuyang Iron and Steel Co., Ltd.; China Metallurgical
Information and Standardization Institute; Zhangjiagang Hongchang Steel Co., Ltd.; Xinyu
Iron & Steel Group Co., Ltd.; Hunan Valin Xiangtan Iron and Steel Co., Ltd.; Hebei Puyang
Iron and Steel Co., Ltd.; Hunan Valin Steel Co., Ltd.; Liuzhou Iron & Steel Co., Ltd.;
Chongqing Iron and Steel Co., Ltd.; Guangdong Zhongnan Iron & Steel Co., Ltd.; Shougang
Group Co., Ltd.; MCC Jingcheng Engineering Technology Co., Ltd.; and Fujian Sansteel
Minguang Co., Ltd.
Chief drafting staffs of this Document. Zhao Guochang, Long Jie, Sun Menghan, Huang Jiugui,
Cao Ruihong, Liu Ximao, Guo Longxin, Qi Jianghua, Wu Kai, Li Hongwei, Qiu Wensheng,
Shi Li, Yu Haiqun, Zhou Wenbo, Wei Ming, Zhang Peng, Zhang Weixu, Li Ran, Xiong
Wenming, Zhang Yongwei, Guo Xiao, Wang Dongyang, Cheng Huibing, Yuan Qinpan, Guo
Xiaolong, Gao Xuhui, Yang Yongda, Dong Chao, and Yan Xiaomin.
This Document was first-time published in 2005; first-time revised in 2015; it is second-time
revised hereby.
Steel Plate for Building Structure
1 Scope
This Document specifies the designation expression method, ordering content, size, shape,
weight, technical requirements, test methods, inspection rules, packaging, marking and quality
certificates of steel plate for building structure.
This Document is applicable to the manufacture of high-performance hot-rolled steel plate
(hereinafter referred to as steel plate) with a thickness of 6mm~200mm for building structures,
long-span structures and other steel structures. Hot-rolled steel strips can also be implemented
with reference to this Document.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in 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) is applicable to this Document.
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 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 223.14 Methods for Chemical Analysis of Iron, Steel and Alloy - The N-Benzoy-N-
Phenylhydroxylamine Extraction Photometric Method for the Determination of Vanadium
Content
3 Terms and Definitions
For the purposes of this Document, there are no terms and definition apply.
4 Designation Expression Method
The designation of steel consists of four parts, namely, the first letter "Q" in Chinese Pinyin for
"Qu" of yield strength, the specified minimum yield strength value, the first letter "GJ" in
Chinese Pinyin for "Gao Jian" of steel for high-performance building structures, and the quality
grade symbol (B, C, D, E).
5 Ordering Contents
Contracts or orders based on this Document include but are not limited to the following.
6 Size, Shape, and Weight
6.1 The size, shape and allowable deviation of the steel plate shall comply with the provisions
of GB/T 709-2019.
6.2 The steel plate is delivered according to the theoretical weight. The thickness used in the
theoretical weight calculation is the average of the maximum and minimum thickness allowed
for the steel plate. The density of the steel plate used for calculation is 7.85g/cm3.
7 Technical Requirements
7.1 Designation and chemical composition
7.1.1 The designation and chemical composition (smelting analysis) of steel shall comply with
the provisions of Table 1.
7.1.2 For thickness direction performance steel plates, the sulfur content shall comply with the
a When V, Nb, and Ti are added in combination, for Q235GJ and Q345GJ, (V+Nb+Ti)≤0.15%; for Q390GJ, Q420GJ, and Q460GJ,
(V+Nb+Ti)≤0.22%.
7.1.3 The carbon equivalent (CEV) and welding crack sensitivity index (Pcm) of all quality
levels of steel of each designation shall comply with the provisions of Table 2.Delivery shall
be in carbon equivalents.
7.1.4 The allowable deviation of the chemical composition of the finished steel plate shall
comply with the provisions of GB/T 222.
7.2 Smelting methods
Steel is smelted in electric furnaces or converters and refined outside the furnace.
7.3 Delivery status
The delivery status of each designation shall comply with the provisions of Table 2.The specific
delivery status shall be agreed upon by both parties and shall be specified in the contract.
7.4 Mechanical properties and process properties
7.4.1 Stretching
The tensile properties of the steel plate shall comply with the provisions of Tables 3 and 4.
7.4.2 Charpy (V-notch) impact test
7.4.2.1 The Charpy (V-notch) impact properties of steel plates of each quality level shall comply
with the provisions of Table 5.
7.4.3 Bending test
7.4.3.1 The bending test of steel plates shall comply with the provisions of Table 6.
7.4.3.2 If the supplier can ensure that the bending test is qualified, the bending test may not be
performed.
7.5 Surface quality
7.5.1 There shall be no cracks, bubbles, scars, folds, inclusions and pressed-in iron oxide scale
on the surface of the steel plate. Steel plates shall not have visible delamination.
7.6 Ultrasonic testing
Steel plates with thickness direction performance shall be ultrasonic tested one by one in
accordance with GB/T 2970, and the qualification level is Level-III.
7.7 Other requirements
According to the requirements of the purchaser and upon agreement between the two parties,
the purchaser may put forward other requirements for the steel plate and indicate them in the
contract.
8 Test Methods
8.1 The inspection items, sampling quantity, specimen direction, sampling method, and test
method of each batch of steel plates shall comply with the provisions of Table 7.
8.2 The chemical composition test of steel is generally conducted in accordance with GB/T
4336, GB/T 20123, GB/T 20124, GB/T 20125 or general chemical analysis methods. During
arbitration, the provisions of the following standards shall be followed, such as GB/T 223.5,
9 Inspection Rules
9.1 Inspection and acceptance
The inspection and acceptance of steel plates shall be carried out by the supplier's technical
inspection department, and the purchaser shall have the right to conduct verification.
9.2 Batching rules
9.3 Reinspection and judgment
9.3.1 The reinspection and judgment of steel plates shall comply with the provisions of GB/T
17505.
9.4 Rounding-off of numerical value
The inspection results of steel plates shall be rounded-off by the rounding value comparison
method.
10 Packaging, Marking and Quality Certificate
The packaging, marking and quality certificate of steel plates shall comply with the provisions
of GB/T 247.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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