GB/T 24587-2025 (GB/T 24587-2009) PDF English
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GB/T 24587-2009: Hot-rolled wire rods for prestressing steel bars of concrete---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/GBT24587-2009
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.60
H 44
Hot-rolled wire rods for
prestressing steel bars of concrete
Issued on. OCTOBER 30, 2009
Implemented on. MAY 01, 2010
Issued by.
General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Content of Order... 6
4 Dimension, Form, Weight and Permissible Deviations... 6
5 Technical Requirements... 7
6 Test Methods... 8
7 Inspection Rules... 8
8 Package, Marking and Quality Certificate... 9
Foreword
This Standard was proposed by China Iron and Steel Association.
This Standard shall be under the jurisdiction of Technical Committee on Steel of
Standardization Committee of China.
Drafting organizations of this Standard. Tianjin Iron and Steel Co., Ltd., Tianjin Yinlong
Prestressing Steel Products Group Co., Ltd., Tangshan Iron and Steel Co., Ltd., Xingtai
Iron & Steel Corp., Ltd., China Metallurgical Information and Standardization Institute.
Main drafters of this Standard. Wu Bo, Gong Wenxu, Zhao Yuxiu, Yu Jingqi, Xie Zhiqin,
Deng Cuiqing, Sun Xiaoling, Han Weiqi, Wang Lingjun, Dai Shifeng.
Hot-rolled wire rods for
prestressing steel bars of concrete
1 Scope
This Standard specifies the content of order, dimension, form, weight and permissible
deviations, technical requirements, test methods, inspection rules, package, marking and
quality certificates etc. for hot-rolled wire rods for prestressing steel bars of concrete.
This Standard applies to hot-rolled wire rods for prestressing steel bars of concrete.
2 Normative references
The articles contained in the following documents have become part of this Standard
when they are quoted herein. For the dated documents so quoted, all the modifications
(excluding corrections) or revisions made thereafter shall not be applicable to this
Standard. For the undated documents so quoted, the latest editions shall be applicable to
this Standard.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.3 Methods for chemical analysis of iron, steel and alloy - The
diantipyrylmethane phosphomolybdate gravimetric method for the determination of
phosphorus content
GB/T 223.11 Iron steel and alloy - Determination of chromium content - Visual titration
or potentiometric titration method (GB/T 223.11-2008, ISO 4937.1986, MOD)
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
3 Content of Order
Contracts or orders signed in accordance with this Standard shall include.
4 Dimension, Form, Weight and Permissible Deviations
4.1 The dimension, form, weight and permissible deviations of wire rods shall comply with
GB/T 14981.
4.2 Any special requirements for the dimension, form and weight of wire rods shall be
mutually agreed upon between the seller and the buyer, and indicated in the contract.
5 Technical Requirements
5.1 Designation and Chemical Composition
5.2 Smelting Process
Steel for wire rod shall be smelted in oxygen converters or electric furnaces.
5.3 Condition of Delivery
Wire rods shall be delivered as hot rolled.
5.4 Mechanical Properties
According to the requirements of the buyer, wire rods can be subject to mechanical
performance tests; the test items and performance index shall be agreed upon between
the seller and the buyer.
5.5 Decarburized Layer
If required by the buyer and indicated in the contract, wire rods can take a decarburized
depth test. The total decarburized layer at one side of the wire rod (ferrite + transition layer)
is divided into two groups as shown in Table 2.D in the table is the nominal diameter of
wire rods. The group shall be indicated in the contract. If not, it will be regarded as group
II.
5.6 Surface Quality
5.7 Special Requirements
Based on the buyer’s needs and agreed on between the seller and the buyer, tests of
microstructures, non-metallic inclusions, etc. can be carried out, with the test indexes
determined through consultation between both parties, and indicated in the contract.
6 Test Methods
6.1 The chemical composition of steel can be tested through common methods; when
arbitration, it shall be conducted according to GB/T 223.
7 Inspection Rules
7.1 Inspection and Acceptance
The quality inspection and acceptance of wire rods shall be carried out by the seller’s
technical supervision department. The buyer is entitled to carry out inspection and
acceptance according to this Standard.
7.3 Re-inspection and Decision Rules
The re-inspection and decision rules of wire rods shall be in accordance with GB/T 2101.
8 Package, Marking and Quality Certificate
The package, marking and quality certificate of wire rods shall comply with GB/T 2101.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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