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ASTM B522-90(1995)e1

(Specification)

Standard Specification for Gold-Silver-Platinum Electrical Contact Alloy

Standard Specification for Gold-Silver-Platinum Electrical Contact Alloy

SCOPE
1.1 This specification covers 69% gold, 25% silver, 6% platinum alloy tubing, rod, wire, and sheet material for sliding electrical contacts.  
1.2 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units may be approximate.  
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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.4 It is the responsibility of the user 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.

General Information

Status
Historical
Publication Date
09-Jun-2001
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

Replaced By
ASTM B522-01 - Standard Specification for Gold-Silver-Platinum Electrical Contact Alloy
Effective Date
10-Jun-2001

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ASTM B522-90(1995)e1 - Standard Specification for Gold-Silver-Platinum Electrical Contact AlloyASTM B522-90(1995)e1 - Standard Specification for Gold-Silver-Platinum Electrical Contact Alloy
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ASTM B522-90(1995)e1 - Standard Specification for Gold-Silver-Platinum Electrical Contact Alloy
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Standards Content (Sample)


NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
ε1
Designation: B 522 – 90 (Reapproved 1995)
Standard Specification for
Gold-Silver-Platinum Electrical Contact Alloy
This standard is issued under the fixed designation B 522; 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 (ε) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
ε NOTE—Section 8 was added editorially in June 1995.
TABLE 1 Chemical Requirements
1. Scope
1.1 This specification covers 69 % gold, 25 % silver, 6 %
Element Composition, weight %
platinum alloy tubing, rod, wire, and sheet material for sliding
Class I Class II
electrical contacts.
Gold 68.0–70.0 68.5–69.5
1.2 The values stated in inch-pound units are to be regarded
Silver 23.5–26.5 24.5–25.5
as the standard. The metric equivalents of inch-pound units
Platinum 5.0–7.0 5.5–6.5
Selected base metals (Pb, Sb, Bi, Sn, . 0.01
may be approximate.
As, Cd, Ge, Ti, and Ga), max
1.3 This standard does not purport to address all of the
Sulfur, max . 0.01
safety concerns, if any, associated with its use. It is the Total platinum group metal impurities, max 0.15 0.15
Total base metal impurities, max 0.20 0.1
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Mechanical and Electrical Requirements
1.4 It is the responsibility of the user to become familiar
5.1 The criterion for temper designation shall be Knoop
with all hazards including those identified in the appropriate
hardness or tensile strength (but not both) as defined in the
Material Safety Data Sheet for this product/material as pro-
contract or order.
vided by the manufacturer.
5.1.1 Knoop hardness indentations shall be made so that the
2. Referenced Documents long axis of the indenter is parallel to the rolling or drawing
direction of the material.
2.1 ASTM Standards:
5.2 Mechanical and electrical properties shall conform to
B 476 Specification for General Requirements for Wrought
the requirements of Table 2 and Table 3.
Precious Metal Electrical Contact Materials
5.3 All test specimens shall be the supplied size when
3. Manufacture
practical.
3.1 Raw materials shall be of such quality and purity that 5.4 All tests are to be conducted at room temperature (65 to
the finished product will have the properties and characteristics
80°F) (18 to 27°C).
prescribed in this specification.
6. General Requirements
3.2 The material shall be finished by such operations (cold
6.1 SpecificationB 476shallapplytoallmaterialsproduced
working, annealing, turning, grinding, pickling) as are required
to this specification.
to produce the prescribed properties.
7. Inspection and Testing
4. Chemical Composition
7.1 Material furnished under this specification shall be
4.1 Material produced under the specification shall meet the
inspected by the manufacturer as follows:
requirements for chemical composition prescribed in Table 1.
7.1.1 Visual inspection of 103,
7.1.2 Temper test (hardness or tensile),
7.1.3 Dimensional tests, and
This test method is under the jurisdiction of ASTM Committee B-2 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommitte
...

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SCOPE
1.1 This specification covers electrical contact components made from silver nickel by powder metallurgical procedures.  
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