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GB/T 20118-2025: General technical requirements for steel wire ropes
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GB/T 20118: Evolution and historical versions
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General technical requirements for steel wire ropes
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| GB/T 20118-2017 | English | 999 |
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Steel wire ropes for general purposes
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| GB/T 20118-2006 | English | RFQ |
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Steel wire ropes for general purpose
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Standard similar to GB/T 20118-2025 GB/T 18579 | GB/T 21839 | GB/T 18983 | GB/T 11182 | GB/T 20119 | Basic data | Standard ID | GB/T 20118-2025 (GB/T20118-2025) | | Description (Translated English) | General technical requirements for steel wire ropes | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H49 | | Classification of International Standard | 77.140.65 | | Word Count Estimation | 74,735 | | Date of Issue | 2025-08-29 | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 20118-2017, GB/T 25833-2010, GB/T 20067-2017 | | Issuing agency(ies) | State Administration for Market Regulation; Standardization Administration of China | GB/T 20118-2025: General technical requirements for steel wire ropes---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/GBT20118-2025
ICS 77.140.65
CCSH49
National Standards of the People's Republic of China
Replace GB/T 20118-2017, GB/T 25833-2010, GB/T 20067-2017
General technical conditions for steel wire rope
(ISO 2408.2017,Steelwireropes-Requirements,MOD)
Published on 2025-08-29
Implemented on 2026-03-01
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of Contents
Preface III
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4.Classification 3.
5 marks 5
6.Order details 5.
7 Materials 5
8 Technical Requirements 7
9.Test 18
10 Experiments 19
11 Acceptance Method 22
12 Packaging, Marking and Certificate of Quality 22
13 Safety, Use and Maintenance 22
Appendix A (Informative) Structural Changes of This Document Compared to ISO 2408.2017 23
Appendix B (Informative) Technical Differences Between This Document and ISO 2408.2017 and Their Reasons 25
Appendix C (Normative) Table 27 Minimum Breaking Tensile Force for Steel Wire Rope Categories, Diameters, and Grades
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
This document supersedes GB/T 20118-2017 "General Technical Requirements for Steel Wire Ropes" and GB/T 25833-2010 "Galvanized Steel Wire for Highway Guardrails".
Compared with GB/T 20118-2017, the standards for "Ropes" and "Coarse Diameter Steel Wire Ropes" have undergone structural adjustments and editorial changes.
In addition, the main technological changes are as follows.
---Added 3×7, 3×19M, 6×61, 8×61M, 6×35N, 6×61N, 6×91N, 8×61N, 8×91N, and 8×61 (total)
Of the 10 wire rope categories, 4 × V39 wire rope categories have been removed (see Table 1,.2017 edition of Table 1).
---Three new wire rope categories have been added. 24(W)×7, 24(W)×19, and 35(W)×36 (see Table 2);
---The steel wire used for rope making has been upgraded to a nominal tensile strength grade of 2060 MPa (see 7.1);
---The requirements for the fiber core have been changed (see 7.2.1,.2017 version 7.2.1);
---The requirement for the minimum distance between wire joints in multi-strand wire ropes has been changed (see 8.3,.2017 version of 8.3);
---The oiling requirements for wire ropes have been changed (see 8.4,.2017 version 8.4);
---Requirements for pre-deformation and post-deformation of wire ropes have been added (see 8.5);
---The requirement for wire rope lay method has been removed (see 8.9 in the.2017 edition);
---The requirements for permissible diameter deviation and out-of-roundness of wire ropes have been changed (see Table 6, Table 6 in the.2017 edition);
---The requirement for wire rope lay length has been increased (see 8.11);
---Added 3×7, 3×19M, 6×61, 6×35N, 6×61N, 6×91N, 8×61, 8×61M, 8×61N, 8×91N, 24
Reference weight coefficients and minimum breaking strength coefficients for 13 categories of wire ropes. (W)×7, 24(W)×19, and 35(W)×36.
The reference weight factors for 35(W)×7, 35(W)×19, and 34(M)×7 wire ropes have been changed, and the reference weight factor for 4×V39 has been removed.
Weight factor and minimum breaking tensile strength factor (see Table 8,.2017 edition);
---The allowable tensile strength of steel wire has been changed (see Table 9, Table 9 in the.2017 edition);
---The minimum number of twists for steel wires with a diameter of 4.80mm to 6.00mm has been increased (see Table 10);
---The minimum number of bends required for 4.80mm~5.00mm steel wire has been increased (see Table 11);
---The minimum coating weight requirement for 4.00mm~6.00mm steel wire has been changed (see Table 12,.2017 version of Table 12);
---Added requirements for wire rope end treatment (see 8.16);
---The accuracy requirements for wire rope diameter measuring instruments have been changed (see 9.1.1,.2017 version of 9.1.1);
---A method for measuring the length of steel wire rope has been added (see 9.2);
---Added provisions for zinc coating adhesion testing (see 10.3.5).
This document is modified to adopt ISO 2408.2017 "Requirements for wire ropes".
Compared with ISO 2408.2017, this document has undergone many structural adjustments. A comparison table of the structural numbering changes between the two documents can be found here.
Appendix A.
This document differs significantly from ISO 2408.2017.The relevant clauses are indicated in vertical single-line margins.
The lines (|) are marked. A summary of these technical differences and their reasons can be found in Appendix B.
The following editorial changes have been made to this document.
---To align with existing standards, the document name has been changed to "General Technical Requirements for Steel Wire Ropes";
---Informative Annexes F, G, and H of ISO 2408.2017 have been deleted.
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the China Iron and Steel Association.
This document is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183).
This document was drafted by. Guizhou Steel Rope Co., Ltd., Jiangsu Langshan Steel Rope Co., Ltd., and Jiangsu Yunyu Metal Products Co., Ltd.
Company, Jully Group Co., Ltd., Jiangsu Saifutian Group Co., Ltd., Shanghai Junwei Steel Ropes & Rigging Co., Ltd., Jiangsu Shenwang
Group Steel Cable Co., Ltd., Hunan Xianggang Metal Materials Technology Co., Ltd., Haicheng Zhengchang Industrial Co., Ltd., Offshore Oil Engineering Co., Ltd.
The company, Shandong Deshang Metal Technology Co., Ltd., Yancheng Zhengyang Steel Rope Co., Ltd., Yancheng Rongxing Rope Manufacturing Co., Ltd., and Shenxian Shengxin Metal Manufacturing Co., Ltd.
Product Co., Ltd., Nantong Product Quality Supervision and Inspection Institute, and Metallurgical Industry Information and Standards Research Institute.
The main drafters of this document are. Liu Tingjun, Yang Zhengyan, Ren Cuiying, Chen Yansong, Zhang Shousen, Li Jiaojiao, Deng Haiyan, Xue Jianjun, and Zhao Chunjiang.
Yang Yuemin, Wang Shijun, Huang Weijie, Wang Zhouyong, Zhao Ruming, Yang Xiaolong, Wang Zhenzhong, Zhang Jing, Xu Hua, Cao Quanli, Chen Jianhao, Liu Hongjun, Su Diyao
Gu Xiaojian, Cai Hong, Cui Haijing, Gao Zhengkai, Song Ziwu, Huang Jianming, Liu Yisen, Li Xingwei, Zhang Yongqing, Zhao Ruie, Zhang Hui, Xu Xiaojing, Ling Chen
Wang Lingjun, Leng Mingjian, Yang Fan.
The document replaced by this document has been released in the following versions.
---GB/T 20118, first published in.2006 as GB/T 20118-2006 "General Purpose Steel Wire Rope" (GB/T 20118-2006)
The replaced documents and their previous release information are. GB 1102-1974 "Round Strand Steel Wire Rope", GB 8918-1988 "High-Quality Steel Wire Rope".
The standard for steel wire ropes (GB/T 8918-1996) was first revised in.2017.
---GB/T 20067, first published in.2006 as GB/T 20067-2006, and revised for the first time in.2017;
---GB/T 25833, first published in.2010 as GB/T 25833-2010.
General technical conditions for steel wire rope
1.Scope
This document defines the terminology and definitions for wire rope, provides classification and marking, and specifies the ordering details, materials, technical requirements, inspection, and verification.
The method of acceptance, packaging, marking and quality certificate, safety, use and maintenance, and test methods are described.
This document applies to round and shaped strand wire ropes made of bright and coated carbon steel wire.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 228.1 Metallic materials—Tensive testing—Part 1.Tests at room temperature (GB/T 228.1-2021, ISO 6892-1)
2019, MOD)
GB/T 238 Metallic materials - Wire - Repeated bending test method (GB/T 238-2013, ISO 7801.1984, MOD)
GB/T 239.1 Metallic materials - Wire - Part 1.Unidirectional torsion test method (GB/T 239.1-2023, ISO 7800.
2012, IDT)
GB/T 1839 Test methods for the quality of galvanized coatings on steel products (GB/T 1839-2008, ISO 1460.1992, MOD)
GB/T 2104 General provisions for packaging, marking and quality certificate of steel wire rope
GB/T 8170 Rules for rounding off numerical values and the representation and determination of limiting values
GB/T 8358 Test method for breaking tensile strength of steel wire rope (GB/T 8358-2023, ISO 3108.2017, MOD)
GB/T 8706 Wire Ropes - Terminology, Marking and Classification (GB/T 8706-2017, ISO 17893.2004, MOD)
GB/T 15030 Sisal steel wire rope core (GB/T 15030-2021, ISO 4345.1988, NEQ)
GB/T 21965 Steel Wire Rope Acceptance and Defect Terminology
GB/T 29086 Safe Use and Maintenance of Steel Wire Ropes
GB/T 43357 General Performance Test Methods for Steel Wire Ropes
NB/SH/T 0387 Lubricants for steel wire ropes
YB/T 4452 Steel Wire Rope Fiber Core
YB/T 5343 Round steel wire for rope making
3.Terms and Definitions
The terms and definitions defined in GB/T 8706 and the following terms and definitions apply to this document.
3.1
wire rope lay length
In a single-strand wire rope, the outer strands rotate around the wire rope axis once (or in a spiral) and remain parallel to the steel wire.
The distance between two corresponding points on the axis of the silk rope (see Figure 1).
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