GB/T 4357-2022 PDF English
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| 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).
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.
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)
GB/T 228.1 Metallic materials - Tensile testing - Part 1.Method of test at room
temperature (GB/T 228.1-2010, ISO 6892-1.2009, MOD)
GB/T 239.1 Metallic materials - Wire - Part 1.Simple torsion test (GB/T 239.1-
2012, ISO 7800.2003, MOD)
GB/T 341 Steel wire - Classification and terminology
GB/T 342-2017 Dimension, shape, mass and tolerance of cold-drawn round square
and hexagonal steel wires (ISO 22034-2.2016, NEQ)
GB/T 1839 Test method for gravimetric determination of the mass per unit area of
galvanized coatings on steel products (GB/T 1839-2008, ISO 1460.1992, 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.
3.1
Patented
A heat treatment method, which places the medium carbon steel or high carbon steel,
that was heated for austenitizing, in a hot bath of appropriate temperature (such as
lead bath, salt bath, water bath, etc.) OR in a forced air flow (such as controlled air
cooling after rolling in a steel mill), for cooling purposes, to obtain sorbite or sorbite-
based metallography.
[Source. 5.50 of GB/T 7232-2012, and 3.3.14 of GB/T 341-2008, with modifications]
3.2
Static load
The constant load, OR the load, which changes but whose design stress does not
exceed 0.1 times the fatigue strength, OR the load whose design stress exceeds 0.1
times the fatigue strength but total number of cycles does not reach 10000, as
undertaken by the spring.
[Source. GB/T 23935-2009, 5.1.1, with modifications]
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.
a) This document number;
b) Nominal diameter of steel wire;
c) Quantity.
6 Dimensions and shape requirements
The allowable deviation of the diameter of the coiled steel wire shall meet the
requirements of Table 2.The allowable deviation of the diameter of the straight steel
wire shall meet the requirements of Table 3.
7 Technical requirements
The chemical composition (melting analysis) of the steel shall comply with the
requirements in Table 4.The allowable deviation of the chemical composition of the
finished steel wire shall comply with the provisions of GB/T 222.
Phosphating is a common plating. Other coatings can be negotiated.
The plated steel wire can be galvanized, plated with zinc-aluminum alloy or copper;
OR other plating can be negotiated, between the supplier and the buyer.
8 Test methods
Steel wire's diameter. Use an outer micrometer to measure on any cross-section;
take the arithmetic mean of two values, in the mutually perpendicular directions.
Out-of-roundness of steel wire. The difference, between the largest diameter and
the smallest diameter, which is measured on the same cross-section.
9 Inspection rules
Unless there is a special agreement between the supplier and the buyer, all tests shall
be carried out at the supplier's premises.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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