GB/T 5267.1-2002 (GB/T 5267.1-2023 Newer Version) PDF English
GB/T 5267.1-2002 (GB/T5267.1-2002, GBT 5267.1-2002, GBT5267.1-2002)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 5267.1-2023 | English | 1099 |
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Fasteners -- Electroplate coating
| Valid |
| GB/T 5267.1-2002 | English | 125 |
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Fasteners -- Electroplated coatings
| Obsolete |
| GB/T 5267-1985 | English | 639 |
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Electroplated coatings on threaded fasteners
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Newer version: GB/T 5267.1-2023 Standards related to (historical): GB/T 5267.1-2023
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GB/T 5267.1-2002: PDF in English (GBT 5267.1-2002) GB/T 5267.1-2002
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.060.01
J 13
GB/T 5267.1-2002 / ISO 4042:1999
Replacing GB/T 5267-1985
Fasteners – Electroplated Coatings
(ISO 4042:1999, IDT)
ISSUED ON: DECEMBER 05, 2002
IMPLEMENTED ON: JUNE 01, 2003
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine
Table of Contents
Foreword ... 4
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 7
4 Dimensional Requirements and Gauging ... 8
5 Other Coating Requirements ... 9
6 Hydrogen Embrittlement Relief ... 9
7 Corrosion Protection ... 10
8 Applicability to Fasteners that Cut or form Their Own Mating Threads ... 10
9 Specification of Coating Thickness ... 11
10 Measurement of Coating Thickness ... 14
11 Sampling for Thickness Tests ... 14
12 Ordering Requirements for Electroplating ... 15
13 Designation ... 15
Annex A (Informative) Hydrogen Embrittlement Relief ... 16
Annex B (Informative) Salt Spray Corrosion Protection Performance of Metallic
Coatings ... 19
Annex C (Informative) Guidance on Procedures that may be Adopted to
Accommodate Thick coatings ... 21
Annex D (Normative) Determination of Batch Average Thickness ... 23
Annex E (Normative) Designation Code, System A, for Electroplated Coatings
on Threaded Parts ... 26
Annex F (Informative) Examples for Coating Designation ... 29
Annex G (Informative) Surface Areas of Bolts, Screws and Nuts ... 30
Foreword
This Part is one of the national serial standards of “Fastener Surface Treatment”. Such
serial standards include as follows:
a) GB/T 5267.1-2002 Fasteners - Electroplated Coatings;
b) GB/T 5267.2-2002 Fasteners－Non-Electrolytically Applied Zinc Flake Coatings.
This Part equivalently adopts international standard of ISO 4042:1999 Fasteners –
Electroplated Coatings (English Edition).
This Part replaced GB/T 5267-1985 Electroplated Coatings on Threaded Fasteners.
Compared with GB/T 5267-1985, this Part has the major changes as follows:
--- Modify standard number (the Edition 1985 is GB/T 5267; this Edition is GB/T
5267.1);
--- Adjust the contents of terms and definitions (Clause 2 of Edition 1985; Clause 3
of this Edition);
--- Cancel the use conditions of electroplated coatings (4.2 of Edition 1985);
--- Increase the provision on the upper limit of the thickness of coatings with P =
0.2~0.3mm; adjust the provision on the upper limit of coatings with other pitches
(Table 4 and 5 in Clause 5 of Edition 1985; Table 2 of this Edition);
--- Cancel the provision of old standard on the coating thickness inspection and
acceptance; adopt the provision of GB/T 90.1 (Clause 8 of Edition 1985; Clause
11 of this Edition);
--- Adjust and supplement the information on removal of hydrogen embrittlement
(Clause 9 and Annex C of Edition 1985; Clause 6 and Annex A of this Edition);
--- Cancel the determination of local thickness (Annex B of Edition 1985);
--- Add the code marking system for the thickness of the electroplated coatings of
threaded parts (Clause 13 and Annex E of this Edition);
--- Adjust the specified contents of “Guidance on Procedures that may be Adopted
to Accommodate Thick Coatings” (Annex E of Edition 1985; Annex C of this
Edition);
--- Add Examples for Coating Designation (Annex F of this Edition).
This Part’s Annexes D, F are normative; while Annexes A, B, C, F, G are informative.
This Part was proposed by China Machinery Industry Federation.
This Part shall be under the jurisdiction of National Technical Committee for
Standardization of Fasteners (CSB TS/TC 85).
This Part was drafted by Mechanical Engineering Research Institute.
This Part was first-time published in July 1985.
Fasteners – Electroplated Coatings
1 Scope
This Part specifies dimensional requirements for electroplated fasteners of steel or
copper alloy. It specifies coating thicknesses and gives recommendations for hydrogen
embrittlement relief for fasteners with high tensile strength or hardness and for surface-
hardened fasteners.
This Part primarily concerns the electroplating of threaded fasteners, but it may also
be applied to other threaded parts. For the applicability to screws that cut or form their
own mating threads, see clause 8.
The specifications given in this Part may also be applied to non-threaded parts such
as washers and pins.
2 Normative References
The provisions in following documents become the provisions of this Part of GB/T 5267
through reference in this Part. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Part, however, parties who
reach an agreement based on this Part are encouraged to study if the latest versions
of these documents are applicable. For undated references, the latest edition of the
referenced document applies.
GB/T 90.1-2002 Fasteners - Acceptance Inspection (idt ISO 3269:2000)
GB/T 192-1981 General Purpose Metric Screw Threads – Basic Profile
GB/T 1237-2000 Designation System for Fasteners (eqv ISO 8991:1986)
GB/T 2516-1981 Common Screw Thread Deviation Table (Diameter 1~355mm)
GB/T 3098.17-2000 Mechanical Properties of Fasteners - Preloading Test for the
Detection of Hydrogen Embrittlement - Parallel Bearing Surface Method (idt ISO
15530:1999)
GB/T 3934-1983 Specification of Gauges for General Purpose Screw Threads
(neq ISO 1502:1978)
GB/T 5782-2000 Hexagon Head Bolts (eqv ISO 4014:1999)
GB/T 9145-1988 General Purpose Screw Threads--Limits of Sizes for Commercial
Bolt and Nut Threads--Medium Quality (eqv ISO 965-2:1980)
GB/T 9797-1997 Metallic Coatings - Electrodeposited Coatings of Nickel plus
Chromium and of Copper plus Nickel plus Chromium (eqv ISO 1456:1988)
GB/T 9798-1997 Metallic Coatings - Electrodeposited Coatings of Nickel (eqv ISO
1458:1988)
GB/T 9799-1997 Metallic Coatings - Electroplated Coatings of Zinc on Iron or Steel
(eqv ISO 2081:1986)
GB/T 9800-1988 Chromate Conversion Coatings on Electroplated Zinc and
Cadmium Coatings (eqv ISO 4520:1981)
GB/T 10125-1997 Corrosion Tests in Artificial Atmospheres - Salt Spray Tests (eqv
ISO 9227:1990)
GB/T 11374-1989 Thermal Spraying Coating - Nondestructive Methods for
Measurement of Thickness (neq ISO 2064:1980)
GB/T 13346-1992 Metallic Coatings－Electroplated Coatings of Cadmium on Iron
and Steel (idt ISO 2082:1986)
ISO 95871) Metallic and Other Inorganic Coatings – Pre-Treatments of Iron or Steel
for Reducing the Risk of Hydrogen Embrittlement
ISO 95882) Metallic and Other Inorganic Coatings – Post-Coating Treatments of
Iron or Steel to Reduce the Risk of Hydrogen Embrittlement
3 Terms and Definitions
For the purposes of this Part, the definitions given in GB/T 11374 (in particular, the
definitions of significant surface, measuring area, local thickness and minimum local
thickness) and GB/T 90.1 together with the following, apply.
3.1 Batch
Quantity of identical fasteners from the same manufacturing lot processed together at
one time.
3.2 Production run
1) To be published.
2) To be published.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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