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ASTM B477-97(2008)

(Specification)

Standard Specification for Gold-Silver-Nickel Electrical Contact Alloy

Standard Specification for Gold-Silver-Nickel Electrical Contact Alloy

ABSTRACT
This specification covers gold-silver-nickel alloy tubing, rod, wire, strip, and sheet material for sliding electrical contacts. Raw materials shall be of such quality and purity that the finished product will have the properties and characteristics prescribed in this specification. The material shall be finished by cold working, heat treating, annealing, turning, grinding, or pickling as are required to produce the prescribed properties. Material produced shall meet the chemical composition requirements. Mechanical properties such as tensile strength, elongation, Knoop hardness, microhardness, as well as the electrical contact shall conform to the prescribed specification.
SCOPE
1.1 This specification covers 75 % gold-22 % silver-3 % nickel alloy tubing, rod, wire, strip, and sheet material for sliding electrical contacts.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
30-Apr-2008
ICS
77.120.99 - Other non-ferrous metals and their alloys
Technical Committee
B02 - Nonferrous Metals and Alloys
Drafting Committee
B02.05 - Precious Metals and Electrical Contact Materials and Test Methods
Current Stage
Ref Project

Relations

Replaces
ASTM B477-97(2002) - Standard Specification for Gold-Silver-Nickel Electrical Contact Alloy
Effective Date
01-May-2008
Replaced By
ASTM B477-97(2012) - Standard Specification for Gold-Silver-Nickel Electrical Contact Alloy
Effective Date
01-Nov-2012

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ASTM B477-97(2008) - Standard Specification for Gold-Silver-Nickel Electrical Contact AlloyASTM B477-97(2008) - Standard Specification for Gold-Silver-Nickel Electrical Contact Alloy
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ASTM B477-97(2008) - Standard Specification for Gold-Silver-Nickel Electrical Contact Alloy
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:B477 −97(Reapproved2008)
Standard Specification for
Gold-Silver-Nickel Electrical Contact Alloy
This standard is issued under the fixed designation B477; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 4. Chemical Composition
1.1 This specification covers 75% gold-22% silver-3%
4.1 Materialproducedunderthespecificationshallmeetthe
nickel alloy tubing, rod, wire, strip, and sheet material for
requirements of chemical composition prescribed in Table 1.
sliding electrical contacts.
1.2 Thevaluesstatedininch-poundunitsaretoberegarded 5. Mechanical and Electrical Requirements
as standard. The values given in parentheses are mathematical
5.1 The contract or order may specify ultimate tensile
conversions to SI units that are provided for information only
strength and elongation, microhardness (Knoop orVickers), or
and are not considered standard.
a combination of these mechanical properties as temper crite-
1.3 This standard does not purport to address all of the
rion.Ifthecontractororderdoesnotspecifyatempercriterion,
safety concerns, if any, associated with its use. It is the
then the criterion for temper designation will be ultimate
responsibility of the user of this standard to become familiar
tensile strength and elongation.
with all hazards including those identified in the appropriate
Material Safety Data Sheet (MSDS) for this product/material 5.2 Mechanical properties shall conform to the listings of
as provided by the manufacturer, to establish appropriate
Table 2.
safety and health practices, and determine the applicability of
5.3 All test specimens shall be full size when practical.
regulatory limitations prior to use.
5.4 Alltestsaretobeconductedatroomtemperature,about
2. Referenced Documents
68°F (20°C).
2.1 ASTM Standards:
B476Specification for General Requirements for Wrought 6. General Requirements
Precious Metal Electrical Contact Materials
6.1 Specification B476 shall apply to all materials produced
E384Test Method for Knoop and Vickers Hardness of
to this specification.
Materials
6.2 Microhardness, when performed, shall be in accordance
3. Manufacture
with Test Method E384.
3.1 Raw materials shall be of such quality and purity that
thefinishedproductwillhavethepropertiesandcharacteristics 7. Inspection and Testing
prescribed in this specification.
7.1 Material furnished under this specification shall be
3.2 The material shall be finished by such operations (cold
inspected by the manufacturer as listed below:
working, heat treating, annealing, turning, grinding, or pick-
7.1.1 Visual inspection at 10×,
ling) as are required to produce the prescribed properties.
7.1.2 Temper test (hardness or tensile),
7.1.3 Dimensional tests, and
This specification is under the jurisdiction of ASTM Committee B02 on 7.1.4 Spectrographic or chemical analysis when indicated
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
by the purchase order.
B02.05 on Precious Metals and Electrical Contact Materials.
Current edition approved May 1, 2008. Published June 2008. Originally
7.2 Thepurchasershallperformsuchtestsasarerequiredto
approved in 1968. Last previous edition approved in 2002 as B477–97(2002).
verify the quality of material procured under this specification.
DOI: 10.1520/B0477-97R08.
For referenced
...

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SCOPE
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