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Delivery: <= 7 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 5267.1-2023: Fasteners - Electroplate coating Status: Valid GB/T 5267.1: Historical versions
Basic dataStandard 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21.060.01 Word Count Estimation: 54,568 Date of Issue: 2023-05-23 Date of Implementation: 2023-12-01 Older Standard (superseded by this standard): GB/T 5267.1-2002 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T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 contentsPreface 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 46forewordThis 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:IntroductionThe 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 Plating1 ScopeThis 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 referencesThe 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) ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 5267.1-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 5267.1-2023_English as soon as possible, and keep you informed of the progress. 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