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GB/T 5267.1-2023: Fasteners - Electroplate coating
Status: Valid GB/T 5267.1: Evolution and historical versions
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| GB/T 5267.1-2023 | English | 1099 |
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Fasteners - Electroplate coating
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GB/T 5267.1-2023
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| GB/T 5267.1-2002 | English | 125 |
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Fasteners -- Electroplated coatings
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GB/T 5267.1-2002
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| GB/T 5267-1985 | English | 639 |
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Electroplated coatings on threaded fasteners
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GB/T 5267-1985
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PDF similar to GB/T 5267.1-2023
Basic data | Standard ID | GB/T 5267.1-2023 (GB/T5267.1-2023) | | Description (Translated English) | Fasteners - Electroplate coating | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J13 | | Classification of International Standard | 21.060.01 | | Word Count Estimation | 54,568 | | Date of Issue | 2023-05-23 | | Date of Implementation | 2023-12-01 | | Older Standard (superseded by this standard) | GB/T 5267.1-2002 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 5267.1-2023: Fasteners - Electroplate coating---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 21:060:01
CCSJ13
National Standards of People's Republic of China
Replace GB/T 5267:1-2002
Fastener Plating
Released on 2023-05-23
2023-12-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface III
Introduction V
1 Scope 1
2 Normative references 1
3 Terms and Definitions 2
4 General characteristics of coatings 2
5 Corrosion resistance and test 8
6 Dimensional requirements and tests 10
7 Mechanical, physical properties and tests 13
8 Suitability of test 14
9 Marking system 14
10 Order Requirements 18
11 Storage Conditions 18
Appendix A (Informative) Design and Installation of Electroplated Fasteners 19
Appendix B (informative) Hydrogen embrittlement 25
Appendix C (informative) Corrosion resistance of chromate conversion coating zinc coating 28
Appendix D (informative) Common thread coating thickness and thread clearance 29
Appendix E (Informative) Corrosion Resistance Evaluation of Coating System Neutral Salt Spray Test Chamber according to GB/T 10125 35
Appendix F (Informative) GB/T 5267:1-2002 Marking Code of Electroplating System for Fasteners 43
Reference 46
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents"
drafting:
This document is part 1 of GB/T 5267: GB/T 5267 has issued the following parts:
---GB/T 5276:1 Electroplating layer of fasteners;
---GB/T 5276:2 Electroless zinc flake coating for fasteners;
---GB/T 5276:3 Hot-dip galvanized coating for fasteners;
---GB/T 5276:4 Fastener surface treatment Corrosion-resistant stainless steel passivation treatment:
This document replaces GB/T 5267:1-2002 "Fastener Plating": Compared with GB/T 5267:1-2002, except for structural adjustment and
Apart from editorial changes, the main technical changes are as follows:
a) The scope of application has been changed to apply to all fasteners, including self-tapping screws, self-extruding screws, washers, rivets and clamps, etc:
Electroplated coatings (conversion coatings, seal coats, surface coatings, lubricants) with or without additional layers (see Chapter 1, Section 1 of the:2002 edition
chapter);
b) Added a statement that the requirements of GB/T 5267:1 for electroplated fasteners take precedence over other general national standards involving electroplating
(see Chapter 1);
c) Deleted all references to ISO 2081 (GB/T 9799);
d) Added minimum corrosion resistance requirements (white corrosion and red rust) (see Chapter 5);
e) Added the latest knowledge about hydrogen embrittlement and preventive measures (see 4:4, Appendix B);
f) Added the definition defined in GB/T 3099:3 (see Chapter 3);
g) Added neutral salt spray test (NSS) (see 5:2) and sulfur dioxide test (Kesternich) (see 5:3);
h) Increased measurability and assembly requirements (see 6:2);
i) The test method for measuring thickness has been added, and the area for measuring thickness has been more clearly specified (see 6:4);
j) Delete the requirement of batch average thickness (see Chapter 9, Appendix D of the:2002 edition);
k) Added marking system for coating system (see Chapter 9);
l) Added mechanical and physical performance requirements and related test methods (see Chapter 7);
m) Added design and installation information for electroplated fasteners (see Appendix A);
n) Added common thread coating thickness and thread clearance information (see Appendix D);
o) Added information on corrosion resistance assessment for neutral salt spray test chambers (see Appendix E):
This document is modified to adopt ISO 4042:2022 "Fastener Electroplating System":
The technical differences between this document and ISO 4042:2022 and their reasons are as follows:
--- Replaced ISO 1891-2 (see Chapter 3) with the normatively quoted GB/T 3099:3 to adapt to the technical conditions of our country;
--- Replaced ISO 1456 (see Table 1, 7:1, Table F:2) with the normatively quoted GB/T 9797 to adapt to the technical conditions of our country;
--- Replaced ISO 2093 (see Table 1, 7:1) with the normatively quoted GB/T 12599 to adapt to the technical conditions of our country;
--- Replaced ISO 2082 (see Table 1, 7:1) with the normatively quoted GB/T 13346 to adapt to the technical conditions of our country;
--- Replaced ISO 15330 (see 4:4:6, B:6) with the normatively quoted GB/T 3098:17 to adapt to the technical conditions of our country;
--- Replaced ISO 9227 (see 5:2, Table 8, A:1:4:1, Appendix C, Appendix E) with the normatively quoted GB/T 10125 to suit
According to the technical conditions of our country;
--- Replaced ISO 1502 (see 6:2:2) with the normatively quoted GB/T 3934 to adapt to the technical conditions of our country;
--- Replaced ISO 3497 (see 6:4) with the normatively quoted GB/T 16921 to adapt to the technical conditions of our country;
--- Replaced ISO 2177 (see 6:4) with the normatively quoted GB/T 4955 to adapt to the technical conditions of our country;
--- Replaced ISO 1463 (see 6:4) with the normatively quoted GB/T 6462 to adapt to the technical conditions of our country;
--- Replaced ISO 2178 (see 6:4) with the normatively quoted GB/T 4956 to adapt to the technical conditions of our country;
--- Replaced ISO 21968 (see 6:4) with the normatively quoted GB/T 31554 to adapt to the technical conditions of our country;
--- Replaced ISO 16047 (see 7:4, Table 12, Chapter 10, A:2:1) with the normative referenced GB/T 16823:3 to adapt to I
country's technical conditions;
--- Replaced ISO 3613 (see 7:5) with the normatively quoted GB/T 9791 to adapt to the technical conditions of our country;
--- Replaced ISO 8991 (see 9:2) with the normatively quoted GB/T 1237 to adapt to the technical conditions of our country;
--- Replaced ISO 16228 (see Chapter 10) with the normatively quoted GB/T 39310 to adapt to the technical conditions of our country:
The following editorial changes have been made to this document:
---Change the name of the standard to "Fastener Plating";
---Replace the international documents cited for information with Chinese documents;
---Changed references:
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed by China Machinery Industry Federation:
This document is under the jurisdiction of the National Fastener Standardization Technical Committee (SAC/TC85):
This document is drafted by: China Machinery Productivity Promotion Center Co:, Ltd:, Jinyi Industrial Co:, Ltd:,
Firmware Co:, Ltd:, Zhoushan 7412 Factory, Zhoushan Zhengyuan Standard Parts Co:, Ltd:, Henan Aerospace Precision Manufacturing Co:, Ltd:, Ningbo Ningli
High-strength Fastener Co:, Ltd:, Product Quality Supervision and Testing Center for General Parts in Machinery Industry, Hunan Shenyi Precision Parts Co:, Ltd:
Division, Suzhou Thermal Engineering Research Institute Co:, Ltd:, Zhejiang Yutai Auto Parts Co:, Ltd:, Yuxing Fastener (Jiaxing) Co:, Ltd:, Jinan Shida
Fastener Co:, Ltd:, Quzhou Tianli Fastener Co:, Ltd:
This document is interpreted by the National Fastener Standardization Technical Committee:
The release status of previous versions of this document and the documents it replaces are as follows:
---It was first published as GB/T 5267-1985 in 1985, and was first revised as GB/T 5267:1-2002 in:2002;
--- This is the second revision:
Introduction
The surface treatment of fasteners is an important link in the production of fasteners: According to the coating function, the corrosion resistance, decoration and function of fasteners can be realized:
performance requirements: When selecting surface treatment for threaded fasteners, not only must realize various functions, but also meet the requirements of screwability:
GB/T 5267 aims to regulate electroplating, electroless zinc flake coating, hot-dip galvanizing, stainless steel passivation and thermal diffusion infiltration for fastener products:
Technical requirements for different surface treatments such as zinc coating, for paint suppliers, coating processors, fastener manufacturers, distributors and end-user organizations
Production, sales and product quality acceptance inspection provide standard basis, and it is proposed to be composed of 5 parts:
---GB/T 5267:1 Fastener plating (ISO 4042);
---GB/T 5267:2 Electroless zinc flake coating for fasteners (ISO 10683);
---GB/T 5267:3 Hot-dip galvanized coating of fasteners (ISO 10684);
---GB/T 5267:4 Fastener surface treatment corrosion-resistant stainless steel passivation treatment (ISO 16048);
---GB/T 5267:5 Specifications for thermal diffusion galvanizing layer of fasteners:
GB/T 5267 transformed 4 independent international standards for surface treatment of fasteners:
surface treatment standards: Incorporate different surface treatment standards into the GB/T 5267 series for ease of use:
Considering research work related to hexavalent chromium-free passivation, seal coat and surface coating application, functional property requirements and minimizing the risk of hydrogen embrittlement
As a new development related to the results of the work, ISO /TC2 carried out a comprehensive revision of ISO 4042:1999 and published it in:2018: Our country is not right
ISO 4042:2018 adopted the standard and directly adopted ISO 4042:2022:
The general standard of electroplating ISO 2081:2018 (GB/T 9799-2011, ISO 2081:2008, IDT) and ISO 19598:2016 are not
Covers all requirements for electroplated fasteners, especially those related to hydrogen embrittlement and baking: Therefore, during the revision process of this document, the two
Standards are referenced to avoid conflicts:
For galvanized nuts, flat washers and case-hardened screws, measures to reduce the risk of hydrogen embrittlement, especially those related to baking, have been revised:
In order to be consistent with the revisions of GB/T 3098:2 and GB/T 3098:5, and to reflect the latest research results: For compliance
For electroplated flat washers of GB/T 3098:26, it is generally believed that the tensile stress caused by intentional and unintentional bending during use may
May increase the risk of hydrogen embrittlement: An appropriate test method to simulate this situation is currently being investigated:
Fastener Plating
1 Scope
This document specifies the technical requirements for electroplating and coating systems of steel fasteners, and the dimensional and characteristic requirements are also applicable to copper or copper alloy fasteners:
firmware:
This document specifies the internal hydrogen embrittlement requirements (see 4:4), and gives recommendations to reduce the risk of hydrogen embrittlement (see Appendix B):
This document applies to galvanized and galvanized alloy (zinc, zinc-nickel, zinc-iron) and cadmium-plated fasteners, mainly for corrosion protection and other functions
characteristic:
--- With or without conversion coating;
--- with or without closure;
--- With or without surface coating;
--- With or without lubrication (self-lubrication and/or additional lubrication):
Only the dimensional requirements for ordinary threaded fasteners in this document apply to other electroplatings and coating systems (tin, tin-zinc, copper-tin, copper-silver, copper,
silver, copper-zinc, nickel, nickel-chromium, copper-nickel, copper-nickel-chromium):
The requirements of this document for electroplated fasteners take precedence over other documents concerning electroplating:
This document applies to bolts, screws, studs and nuts with normal thread, fasteners with non-common thread and non-threaded fasteners, such as washers, pins, clips
Hoops and rivets:
NOTE: Plating is also applied to stainless steel fasteners for the purpose of lubrication to avoid thread seizure:
See Appendix A for design and assembly information on coated fasteners:
This document does not specify fastener weldability or coating performance:
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document:
GB/T 1237 Marking method for fasteners (GB/T 1237-2000, ISO 8991:eqv1986)
GB/T 3098:17 Preload test parallel bearing surface method for checking mechanical properties of fasteners for hydrogen embrittlement (GB/T 3098:17-
2000, ISO 15330:1999, IDT)
GB/T 3099:3 Fastener Terminology Surface Treatment (GB/T 3099:3-2017, ISO 1891-2:2014, MOD)
GB/T 3934 Specifications for common thread gauges (GB/T 3934-2003, ISO 1502:1996, MOD)
GB/T 4955 Metal coating coating thickness measurement - anodic dissolution coulometric method (GB/T 4955-2005, ISO 2177:
2003, IDT)
GB/T 4956 Magnetic method for measuring the thickness of non-magnetic coatings on magnetic substrates (GB/T 4956-2003,
ISO 2178:1982, IDT)
GB/T 6462 Microscopic method for measuring the thickness of metal and oxide coatings (GB/T 6462-2005, ISO 1463:2003,
IDT)
GB/T 9791 Test method for chromate conversion coating of zinc, cadmium, aluminum-zinc alloy and zinc-aluminum alloy (GB/T 9791-2003,
ISO 3613:2000, MOD)
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