Standard
Track updates
AS 1897:2016
[Current]Fasteners — Electroplated coatings
Adopts ISO 4042:1999 to specify 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.
Published: 19/07/2016
Pages: 23
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope
2 Normative references
3 Terms and definitions
4 Dimensional requirements and gauging
4.1 Dimensional requirements before electroplating
4.2 Dimensional requirements after electroplating
5 Other coating requirements
6 Hydrogen embrittlement relief
7 Corrosion protection
8 Applicability to fasteners that cut or form their own mating threads
9 Specification of coating thickness
10 Measurement of coating thickness
10.1 Local thickness
10.2 Batch average thickness
10.3 Agreement on test method
11 Sampling for thickness tests
12 Ordering requirements for electroplating
13 Designation
Annex A
A.1 Introduction
A.2 Stress relief
A.3 Cleaning processes
A.4 Plating process
A.5 Baking process
Annex B
Annex C
C.1 Modification of thread dimensions
C.2 Selective electroplating
Annex D
D.1 Determination for cadmium and zinc
D.1.1 Procedure
D.1.2 Reagents
D.1.3 Calculations
D.1.3.1 Calculate the batch average thickness of coating, in micrometres, using the following formula:
D.1.3.2 Values of K are as follows:
D.2 Determination for nickel and nickel with chromium
D.2.1 Procedure
D.2.1.1 Nickel on steel
D.2.1.2 Nickel on copper or copper alloy
D.2.2 Reagents
D.2.3 Calculations
Annex E
E.1 Code system A
E.2 Designation
Annex F
Annex G
G.1 Bolts and screws
G.2 Nuts
Bibliography
Cited references in this standard
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