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GB/T 24238-2009 English PDF (GBT24238-2009)

GB/T 24238-2009 English PDF (GBT24238-2009)

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GB/T 24238-2009: Hot rolled wire rod for prestressed steel

This Standard specifies the designation, ordering content, size, shape, weight, allowable deviation, technical requirements, testing methods, inspection rules, package, mark and quality certificate of hot rolled wire rod for prestressed steel. This Standard is applicable for the manufacture of hot rolled wire rod for prestressed steel.
GB/T 24238-2009
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.60
H 44
Hot rolled wire rod for prestressed steel
ISSUED ON. JULY 15, 2009
IMPLEMENTED ON. APRIL 01, 2010
Issued by.
General Administration of Quality Supervision, Inspection
and Quarantine of the PEOPLE Republic of China;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1. Scope ... 4
2. Normative references ... 4
3. Designation ... 6
4. Ordering content ... 6
5. Size, shape, weight and allowable deviation ... 6
6. Technical requirements ... 7
7. Test method ... 9
8. Inspection rules ... 10
9. Rounding-off of numerical value ... 10
10. Packing, marking and quality certificate... 10
Annex A (Informative) Comparison on Designations of this Standard and
other Standards ... 11
Foreword
Annex A of this Standard is informative.
This Standard was proposed by China Iron and Steel Industry Association. This Standard shall be under the jurisdiction of National Technical Committee of Standardization for Steel.
Drafting organizations of this Standard. Angang Steel Co., Ltd., China Metallurgical Information And Standardization Institute, Shougang Group, Qingdao Iron and Steel Co., Ltd., Jiangsu Shagang Group Co., Ltd., Xingtai Iron and Steel Co., Ltd. AND Xuanhua Iron and steel group Co., Ltd.
Main drafters of this Standard. Zhang Peng, Piao Zhimin, Wang Liping, Zheng Shifen, Chen Shouqin, Yin Junfeng, Zhang Yuxin, Zhang Junfeng, Wang Lingjun and Dai Shifeng.
Hot rolled wire rod for prestressed steel
1. Scope
This Standard specifies the designation, ordering content, size, shape, weight, allowable deviation, technical requirements, testing methods, inspection rules, package, mark and quality certificate of hot rolled wire rod for prestressed steel.
This Standard is applicable for the manufacture of hot rolled wire rod for prestressed steel (hereinafter referred to as wire rod).
2. Normative references
The articles contained in the following documents have become part of this document when they are quoted herein. For the dated documents so quoted, all subsequent modifications (including all corrections) or revisions made thereafter do not apply to this Standard. However, the parties who reach an agreement according to this Standard are encouraged to study whether the latest versions of these documents may be used. For the undated documents so quoted, the latest versions (including all modification sheets) apply 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 aluminium content - Chrome azurol S photometric 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 223.19 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 223.37 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. 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 Iron steel and alloy - Determination of carbon contents - Gas-volumetric method after combustion in the pipe furnace
GB/T 223.79 Iron and steel - Determination of multi-element contents - X-ray fluorescence spectrometry (Routine method)
GB/T 224 Determination of depth of decarburization of steels
GB/T 228 Metallic materials - Tensile testing at ambient temperature
GB/T 2101 General requirement of acceptance packaging marking and certification for section 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 10561 Steel - Determination of content of nonmetallic inclusions - Micrographic method using standards diagrams
GB/T 13298 Metal - Inspection method of microstructure
GB/T 14981-2009 Dimension shape mass and tolerance for hot-rolled round wire rod 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 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method
GB/T 24242.1-2009 Non-alloy steel wire rods for conversion to wire - Part 1. General requirements
YB/T 081 Rule for rounding off of numerical values and judgement of testing values for technical standards of metallurgy
YB/T 169 Metallographic test method for the sobit percent in the high carbon steel wire rod
3. Designation
The designation of steel is composed of Chinese phonetic alphabet (capitalized) of ?€?stress?€?, average carbon content and the symbols that distinguish the manganese content. For example. YL77A, YL82B.
Where.
YL - Initial Chinese phonetic alphabets of ?€?stress?€?;
72, 77, 82, 87 - Average carbon content specified in the standard (in 0.1?€?); A, B - Symbols that distinguish the different manganese contents in the chemical components.
4. Ordering content
When placing an order, the following information shall be included in the contract. a) Product name;
b) Standard No.;
c) Designation;
d) Nominal diameter of wire rod;
e) Size and shape?€?s accuracy level;
f) Weight;
g) Packing way and marking requirements (if required);
h) Other requirements.
5. Size, shape, weight and allowable deviation
5.1 Size, shape and allowable deviation of wire rod shall meet the provisions of Grade-B Annex A
(Informative)
Comparison on Designations of this Standard and other Standards
Comparison on designations of this Standard and other standards is shown in Table A.1. This Standard ISO 16120-4 JIS G3502 JIS G3506 YB/T 146
YL72A ?€? SWRS 72A SWRH 72A 72A
YL72B C72D2 SWRS 72B SWRH 72B 72MnA
YL77A ?€? SWRS 77A SWRH 77A 77A
YL77B C76D2, C78D2 SWRS 77B SWRH 77B 77MnA
YL82A ?€? SWRS 82A SWRH 82A 82A
YL82B C82D2 SWRS 82B SWRH S2B 82MnA
YL87A ?€? SWRS 87A ?€? ?€?
YL87B C86D2, C88D2 SWRS 87B ?€? ?€?

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