ASTM B522-01(2006)
(Specification)Standard Specification for Gold-Silver-Platinum Electrical Contact Alloy
Standard Specification for Gold-Silver-Platinum Electrical Contact Alloy
ABSTRACT
This specification covers 69% gold, 25% silver, 6% platinum alloy tubing, rod, wire, and sheet material for sliding electrical contacts. The material shall be finished by such operations (cold working, annealing, turning, grinding, pickling) as are required to produce the prescribed properties. The material shall be tested and conform to chemical composition, and mechanical and electrical property requirements. The mechanical requirements of the material are ultimate tensile strength, elongation, microhardness, hardness, or a combination of these mechanical properties as temper criterion. All tests shall be conducted at room temperature.
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.
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.
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation: B522 – 01 (Reapproved 2006)
Standard Specification for
Gold-Silver-Platinum Electrical Contact Alloy
This standard is issued under the fixed designation B522; 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 (´) 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 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 become familiar
with all hazards including those identified in the appropriate
Material Safety Data Sheet (MSDS) for this product/material
5. Mechanical and Electrical Requirements
as provided by the manufacturer, to establish appropriate
5.1 The contract or order may specify ultimate tensile
safety and health practices, and determine the applicability of
strength, elongation, microhardness (Knoop or Vickers), hard-
regulatory limitations prior to use.
ness (Rockwell or Rockwell Superficial), or a combination of
2. Referenced Documents
these mechanical properties as temper criterion. If the contract
or order does not specify a temper criterion, then the criterion
2.1 ASTM Standards:
for temper designation will be ultimate tensile strength and
B476 Specification for General Requirements for Wrought
elongation.
Precious Metal Electrical Contact Materials
5.1.1 Knoop hardness indentations shall be made so that the
3. Manufacture
long axis of the indenter is parallel to the rolling or drawing
direction of the material.
3.1 Raw materials shall be of such quality and purity that
5.2 Mechanical and electrical properties shall conform to
the finished product will have the properties and characteristics
the requirements of Table 2 and Table 3.
prescribed in this specification.
5.3 All test specimens shall be the supplied size when
3.2 The material shall be finished by such operations (cold
practical.
working, annealing, turning, grinding, pickling) as are required
5.4 All tests are to be conducted at room temperature (65 to
to produce the prescribed properties.
80°F) (18 to 27°C).
4. Chemical Composition
6. General Requirements
4.1 Material produced under the specification shall meet the
6.1 Specification B476 shall apply to all materials produced
requirements for chemical composition prescribed in Table 1.
to this specification.
1 7. Inspection and Testing
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
7.1 Material furnished under this specification shall be
B02.05 on Precious Metals and Electrical Contact Materials.
inspected by the manufacturer as follows:
Current edition approved June 1,
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