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ASTM B477-97(2002)

(Specification)

Standard Specification for Gold-Silver-Nickel Electrical Contact Alloy

Standard Specification for Gold-Silver-Nickel Electrical Contact Alloy

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 the standard. The values given in parentheses are for information only.
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 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
09-Dec-1997
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 - Standard Specification for Gold-Silver-Nickel Electrical Contact Alloy
Effective Date
10-Dec-1997
Replaced By
ASTM B477-97(2008) - Standard Specification for Gold-Silver-Nickel Electrical Contact Alloy
Effective Date
01-May-2008

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ASTM B477-97(2002) - Standard Specification for Gold-Silver-Nickel Electrical Contact AlloyASTM B477-97(2002) - Standard Specification for Gold-Silver-Nickel Electrical Contact Alloy
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ASTM B477-97(2002) - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B 477 – 97 (Reapproved 2002)
Standard Specification for
Gold-Silver-Nickel Electrical Contact Alloy
This standard is issued under the fixed designation B 477; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
TABLE 1 Chemical Composition
1. Scope
Element Weight Percent
1.1 This specification covers 75 % gold-22 % silver-3 %
Gold 74.2–75.8
nickel alloy tubing, rod, wire, strip, and sheet material for
Silver 21.4–22.6
sliding electrical contacts.
Nickel 2.6–3.4
1.2 The values stated in inch-pound units are to be regarded
Selected base metals (lead, antimony, bismuth, tin, 0.01 max, total
arsenic, cadmium, germanium, thallium,
as the standard. The values given in parentheses are for
gallium, sulfur)
information only.
Total all base metal impurities (including above selected 0.2 max
1.3 This standard does not purport to address all of the
base metals)
Total noble metal impurities 0.1 max
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
5. Mechanical and Electrical Requirements
Material Safety Data Sheet for this product/material as pro-
5.1 The contract or order may specify ultimate tensile
vided by the manufacturer, to establish appropriate safety and
strength and elongation, microhardness (Knoop or Vickers), or
health practices, and determine the applicability of regulatory
a combination of these mechanical properties as temper crite-
limitations prior to use.
rion.Ifthecontractororderdoesnotspecifyatempercriterion,
then the criterion for temper designation will be ultimate
2. Referenced Documents
tensile strength and elongation.
2.1 ASTM Standards:
5.2 Mechanical properties shall conform to the listings of
B 476 Specification for General Requirements for Wrought
Table 2.
Precious Metal Electrical Contact Materials
5.3 All test specimens shall be full size when practical.
E 384 Test Method for Microindentation Hardness of Ma-
5.4 All tests are to be conducted at room temperature, about
terials
68°F (20°C).
3. Manufacture
6. General Requirements
3.1 Raw materials shall be of such quality and purity that
6.1 SpecificationB 476shallapplytoallmaterialsproduced
the finished product will have the properties and characteristics
to this specification.
prescribed in this specification.
6.2 Microhardness, when performed, shall be in accordance
3.2 The material shall be finished by such operations (cold
with Test Method E 384.
working, heat treating, annealing, turning, grinding, or pick-
ling) as are required to produce the prescribed properties.
7. Inspection and Testing
7.1 Material furnished under this specification shall be
4. Chemical Composition
inspected by the manufacturer as listed below:
4.1 Material produced under the specification shall meet the
7.1.1 Visual inspection at 103,
requirements of chemical composition prescribed in Table 1.
7.1.2 Temper test (hardness or tensile),
7.1.3 Dimensional tests, and
7.1.4 Spectrographic or chemical analysis when indicated
by the purchase order.
This spe
...

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SCOPE
1.1 This specification covers electrical contact components made from silver nickel by powder metallurgical procedures.  
1.2 This specification covers compositions within the silver-nickel system normally specified by users of electrical contacts.  
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