ASTM B522-01(2012)

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 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-2012
• 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

Relations

• Replaces: ASTM B522-01(2006) - Standard Specification for Gold-Silver-Platinum Electrical Contact Alloy
• Effective Date: 01-May-2012

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 2012)
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.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 U.S. Department of Defense.
1. Scope 4. Chemical Composition
1.1 This specification covers 69% gold, 25% silver, 6% 4.1 Materialproducedunderthespecificationshallmeetthe
requirements for chemical composition prescribed in Table 1.
platinum alloy tubing, rod, wire, and sheet material for sliding
electrical contacts.
5. Mechanical and Electrical Requirements
1.2 The values stated in inch-pound units are to be regarded
5.1 The contract or order may specify ultimate tensile
as standard. The values given in parentheses are mathematical
strength, elongation, microhardness (Knoop or Vickers), hard-
conversions to SI units that are provided for information only
ness (Rockwell or Rockwell Superficial), or a combination of
and are not considered standard.
these mechanical properties as temper criterion. If the contract
1.3 This standard does not purport to address all of the
or order does not specify a temper criterion, then the criterion
safety concerns, if any, associated with its use. It is the
for temper designation will be ultimate tensile strength and
responsibility of the user of this standard to become familiar
elongation.
with all hazards including those identified in the appropriate
5.1.1 Knoophardnessindentationsshallbemadesothatthe
Material Safety Data Sheet (MSDS) for this product/material
long axis of the indenter is parallel to the rolling or drawing
as provided by the manufacturer, to establish appropriate
direction of the material.
safety and health practices, and determine the applicability of
5.2 Mechanical and electrical properties shall conform to
regulatory limitations prior to use.
the requirements of Table 2 and Table 3.
5.3 All test specimens shall be the supplied size when
2. Referenced Documents
practical.
2.1 ASTM Standards:
5.4 All tests are to be conducted at room temperature (65 to
B476Specification for General Requirements for Wrought
80°F) (18 to 27°C).
Precious Metal Electrical Contact Materials
6. General Requirements
3. Manufacture
6.1 Specification B476 shall apply to all materials produced
3.1 Raw materials shall be of such quality and purity that
to this specification.
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 follows:
working,annealing,turning,grinding,pickling)asarerequired
7.1.1 Visual inspection of 10×,
to produce the prescribed properties.
7.1.2 Temper test (hardness or tensile),
7.1.3 Dimensional tests, and
7.1.4 Spectrographic or chemical analysis when indicated
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
by the purchase order.
B02.05 on Precious Metals and Electrical Contact Materials.
7.2 Thepurchasershallperformsuchtestsasarerequiredto
Current edition approved May 1, 2012. Published May 2012. Originally
approved in 1970. Last previous edition approved in 2006 as B522–01(2006). verify the quality of material procured under this specification.
DOI: 10.1520/B0522-01R12.
For refer
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