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GB/T 24238-2017 PDF in English


GB/T 24238-2017 (GB/T24238-2017, GBT 24238-2017, GBT24238-2017)
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GB/T 24238-2017: PDF in English (GBT 24238-2017)

GB/T 24238-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.60
H 44
Replacing GB/T 24238-2009
Hot-Rolled Wire Rod for
Prestressed Steel Wire and Strand
ISSUED ON. MAY 31, 2017
IMPLEMENTED ON. DECEMBER 1, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
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 Scope ... 4
2 Normative References ... 4
3 Grade ... 6
4 Booking Content ... 6
5 Dimension, Shape, Weight and Permissible Deviation ... 7
6 Technical Requirements ... 7
7 Test Methods ... 9
8 Inspection Rules ... 10
9 Rounding Off for Values ... 10
10 Package, Marking and Quality Certificate ... 11
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced GB/T 24238-2009 Hot Rolled Wire Rod for Prestressed Steel
Wire and Strand; compared with GB/T 24238-2009, this Standard has the major
technical changes as follows besides the editorial modification.
--- Expand the specification range of wire rod;
--- Cancel four grades of YL72A, YL77A, YL82A, YL87A;
--- Elaborate the sorbate content of each grade;
--- Confirm allowable level requirements for mesh cementite and center martensite;
--- Modify the mechanical properties;
--- Enhance the requirements for decarburization depth.
This Standard was proposed by China Iron and Steel Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Steel (SAC/TC 183).
Drafting organizations of this Standard. Angang Steel Company Limited, Jiangsu
Shagang Group Co., Ltd., Jiangsu Yonggang Group Co., Ltd., Tianjin Iron & Steel
Group Co., Ltd., Zenith Steel Group Co., Ltd., Qingdao Special Iron and Steel Co., Ltd.,
Tianjin Silvery Dragon Prestressed Materials Co., Ltd., Baosteel Group Nantong Wire
Products Co., Ltd., and China Metallurgical Information and Standardization Institute.
Chief drafting staffs of this Standard. Di Liping, Yin Yi, An Huizhu, Ren Maoyong, Ren
Cuiying, Wang Lingjun, Nie Wenjin, Sui Zhisong, Sun Guangtao, Liu Cheng, Wang
Zhengmao, Xie Tieqiao, Chen Liang, Yu Jingqi, Hu Haiping, Liu Xuesen, Li Xiaobo,
Shen Aiguo, Meng Zhaoxian, and Gui Zhonglin.
The historical edition replaced by this Standard is as follows.
--- GB/T 24238-2009.
Hot-Rolled Wire Rod for
Prestressed Steel Wire and Strand
1 Scope
This Standard specifies the grade, ordering content, dimension, shape, weight and
permissible deviation, technical requirements, test methods, inspection rules, package,
marking and quality certificate of wire rod for prestressed steel wire and strand.
This Standard is applicable to the hot-rolled wire rod for prestressed steel wire and
strand (hereinafter referred to as wire rod).
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 document.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 223.5 Methods for Chemical Analysis of Iron, Steel and Alloy - The Reduced
Molybdosilicate Spectrophotometric Method for the Determination of Acid-Soluble
Silicon Content
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
Neocuproine-chloroform Extraction Photometric Method for the Determination of
Copper Content
GB/T 223.23 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Dimethylglyoxime Spectrophotometric Method for the Determination of Nickel
Content
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 223.62 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 Methods for Chemical Analysis of Iron, Steel and Alloy - the Gas-
Volumetric Method after Combustion in the Pipe Furnace for the Determination of
Carbon Content
GB/T 223.72 Iron, Steel and Alloy - Determination of Sulfur Content - Gravimetric
Method
GB/T 224 Determination of Depth of Decarburization of Steels
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1. Method of Test at Room
Temperature
GB/T 2101 Generel Provisions on Acceptance, Package, Marking and Quality
Certificate for Profile Steel
GB/T 2975 Steel and Steel Products – Location and Preparation of Test Pieces for
Mechanical Testing
GB/T 4336 Standard Test Method for Spark Discharge Atomic Emission
Spectrometric Analysis of Carbon and Low-Alloy Steel (Routine Method)
GB/T 6394 Metal - Methods for Estimating the Average Grain Size
GB/T 8170 Rules of Rounding off for Numerical Values & Expression and
Judgement of Limiting Values
GB/T 10561 Steel - Determination of Content of Nonmetallic Inclusions -
Micrographic Method Using Standards Diagrams
GB/T 13298 Inspection Methods of Microstructure for Metals
GB/T 14981-2009 Dimension Shape Mass and Tolerance for Hot-Rolled Round
Wire Rod
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.