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GB/T 4357-2022 English PDF
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GB/T 4357: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 4357-2022 | English | 410 |
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Cold-drawn unalloyed steel wire for springs
| Valid |
| GB/T 4357-2009 | English | 85 |
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Cold-drawn non-alloy steel wire for springs
| Obsolete |
| GB/T 4357-1989 | English | 80 |
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[GB 14647-2008] Carbon spring steel wires
| Obsolete |
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GB/T 4357-2022: Cold-drawn unalloyed steel wire for springs
---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/GBT4357-2022
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.56
CCS H 49
Replacing GB/T 4357-2009
Cold-drawn unalloyed steel wire for springs
(ISO 8458-2.2002, Steel wire for mechanical springs - Part 2.Patented cold-drawn
non-alloy steel wire, MOD)
Issued on. APRIL 15, 2022
Implemented on. NOVEMBER 01, 2022
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 4
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 7
4 Classification and marking... 9
4.1 Classification... 9
4.2 Marking... 9
5 Order contents... 10
6 Dimensions and shape requirements... 10
6.1 Dimensions and allowable deviation... 10
6.2 Out-of-roundness... 12
6.3 Cast of steel wire... 13
6.4 Straightness of straight wire... 13
7 Technical requirements... 14
7.1 Materials... 14
7.2 Surface state and requirements... 14
7.3 Surface quality... 16
7.4 Mechanical properties... 16
7.5 Process performance... 16
7.6 Welding... 17
8 Test methods... 22
8.1 Dimensions and appearance... 22
8.2 Plating... 22
8.3 Surface quality... 23
8.4 Mechanical properties... 23
8.5 Process performance... 23
8.6 Other test methods... 23
9 Inspection rules... 24
9.1 Inspection and acceptance... 24
9.2 Group-batching rules... 24
9.3 Spot check and sampling... 24
9.4 Re-inspection... 24
9.5 Numerical rounding and determination... 24
10 Packaging, transportation, storage, marking, quality certificate... 26
10.1 Packaging, transportation, storage... 26
10.2 Markings and quality certificates... 26
Appendix A (Informative) Comparison of structure numbers between this document
and ISO 8458-2.2002... 27
Appendix B (Informative) Technical differences between this document and ISO 8458-
2.2002 and their reasons... 28
Appendix C (Informative) Suggestions for the use of steel wires... 30
References... 33
Foreword
This document was drafted, in accordance with the provisions of GB/T 1.1-2020
"Directives for standardization - Part 1.Rules for the structure and drafting of
standardizing documents".
This document replaces GB/T 4357-2009 "Cold-drawn non-alloy steel wire for springs".
Compared with GB/T 4357-2009, except for structural adjustment and editorial changes,
the main technical changes are as follows.
a) ADD the normative references (see Chapter 2; Chapter 2 of the 2009 edition);
b) ADD the term "patented" and its definition. DELETE the terms "cold-drawn non-
alloy steel wire for spring" and "ring" and their definition; CHANGE the
definition of other terms (see Chapter 3; Chapter 3 of 2009 edition);
c) CHANGE the Table 1 and order content (see Table 1; Chapters 4 and 5 of the 2009
edition);
d) CHANGE the technical requirements for wire rods (see 7.1.1; 7.1.2 and Table 5
of the 2009 edition);
e) ADD the area reduction index (see Table 6); CHANGE some torsional
performance indexes (see Table 6; Table 8 of 2009 edition), as well as some
strength indexes in the range of 0.40 mm ~ 0.48 mm (see Table 6; Table 8 of the
2009 edition);
f) CHANGE the allowable fluctuation range of the tensile strength of the same coil
of steel wire (see Table 7; 7.4.2 of the 2009 edition);
g) ADD the inspection method for the pitch (see 8.1.4);
h) ADD the inspection method for aluminum content, in zinc-aluminum alloy plating
(see 8.2.1);
i) CHANGE the "nominal diameter" on which the tensile strength is based, into
"measured diameter" (see 8.4; 7.4.1 of the 2009 edition);
j) CHANGE the "Summary of inspection items, applicability, requirements,
sampling inspection proportion, test methods, technical requirements" (see Table
8; Table 9 of the 2009 edition);
k) ADD the transport and storage requirements (see 10.1; 10.1 of the 2009 edition);
l) ADD the Appendix C, to provide guidance and suggestions for the selection of
steel wires.
This document modifies and adopts ISO 8458-2.2002 "Steel wire for mechanical
springs - Part 2.Patented cold-drawn non-alloy steel wire".
Compared with ISO 8458-2.2002, this document has many adjustments in structure.
See Appendix A, for a comparison of structure numbering changes between the two
documents.
Compared with ISO 8458-2.2002, this document has many technical differences, which
are marked by a vertical single line (|) in the outer margin of the clauses involved. See
Appendix B, for these technical differences and their reasons.
Please note that some content of this document may be patented. The issuing agency of
this document assumes no responsibility for identifying patents.
This document was proposed by China Iron and Steel Association.
This document shall be under the jurisdiction of the National Steel Standardization
Technical Committee (SAC/TC 183).
Drafting organizations of this standard. Xinyu Xingang Metal Products Co., Ltd.,
Jiangyin Bekaert Wire Products Co., Ltd., Tianjin Huayuan Times Metal Products Co.,
Ltd., Bekaert (Qingdao) Wire Products Co., Ltd., Ningbo Mingpin Metal Products Co.,
Ltd., Jiangsu Shenwang Group Steel Cable Co., Ltd., Hubei Fuxing New Material
Technology Co., Ltd., Shandong Xindadi Holding Group Co., Ltd., Xinyu Xinrui Metal
Products Co., Ltd., Metallurgical Industry Information Standards Research Institute.
The main drafters of this document. Duan Jianhua, Zhou Binbin, Leng Mingjian, Liao
Jian, Xu Rong, Wang Yong, Yan Lei, Cao Shumin, Yu Jiawei, Huang Weijie, Li
Longbiao, Fu Chongjian, Hu Jiye, Qi Naqiao, Cheng Shumao, Wen Jun, Huang
Jianming, Deng Rongyuan, Sun Dayong, Fu Xiaohua, Ren Cuiying, Wang Lingjun.
This document was first published in 1984; revised for the first time in 1989; revised
for the second time in 2009.This is the third revision.
Cold-drawn unalloyed steel wire for springs
1 Scope
This document specifies the classification and marking, order content, size and shape
requirements, technical requirements, test methods, inspection rules, packaging,
transportation, storage, marking, quality certificates for the manufacture of cold-drawn
non-alloy steel wire for springs.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. 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 standard.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 224 Determination of the depth of decarburization of steels (GB/T 224-2019,
ISO 3887.2017, MOD)
3 Terms and definitions
The terms and definitions, which are defined in GB/T 341, as well as the following
terms and definitions, apply to this document.
The distance in the horizontal direction, after the two ends of a free hanging ring of
steel wire are bounced apart.
4 Classification and marking
Corresponding to the stress level of the spring, the steel wire can be divided into three
strength grades. low tensile strength (L), medium tensile strength (M), high tensile
strength (H).
5 Order contents
The order contracts under this document shall contain the following requirements.
6 Dimensions and shape requirements
The out-of-roundness shall not be greater than half of this diameter tolerance.
The straightness of the straight steel wire shall meet the requirements of GB/T 342- 2017.
7 Technical requirements
Phosphating is a common plating. Other coatings can be negotiated.
When requested by the purchaser, the steel wire, which has a nominal diameter of less
than 3.00 mm, may adopt winding test; it shall not have any cracks.
When requested by the purchaser, the coil spring test can be carried out, on the steel
wire which has a nominal diameter d not greater than 0.70 mm.
8 Test methods
The tensile strength shall be calculated, from the measured diameter.
When measuring the size required for calculating the reduction of cross-section, the
measurement error shall not be greater than ±1%.
Other test methods shall comply with the provisions of Table 8.
9 Inspection rules
Sampling ratio requirements shall be in accordance with Table 8.When taking 10% of
the number of steel wire pieces, in each production batch, take a maximum of 10 pieces;
but for a batch of 20 pieces or less, take at least 2 pieces.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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