ASTM B522-01

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

Relations

• Replaces: ASTM B522-90(1995)e1 - Standard Specification for Gold-Silver-Platinum Electrical Contact Alloy
• Effective Date: 10-Jun-2001
• Replaced By: ASTM B522-01(2006) - Standard Specification for Gold-Silver-Platinum Electrical Contact Alloy
• Effective Date: 01-Jun-2006

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B 522 – 01
Standard Specification for
1
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 (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 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.
1.4 It is the responsibility of the user to become familiar
ness (Rockwell or Rockwell Superficial), or a combination of
with all hazards including those identified in the appropriate
these mechanical properties as temper criterion. If the contract
Material Safety Data Sheet for this product/material as pro-
or order does not specify a temper criterion, then the criterion
vided by the manufacturer.
for temper designation will be ultimate tensile strength and
2. Referenced Documents elongation.
5.1.1 Knoop hardness indentations shall be made so that the
2.1 ASTM Standards:
long axis of the indenter is parallel to the rolling or drawing
B 476 Specification for General Requirements for Wrought
2
direction of the material.
Precious Metal Electrical Contact Materials
5.2 Mechanical and electrical properties shall conform to
3. Manufacture
the requirements of Table 2 and Table 3.
5.3 All test specimens shall be the supplied size when
3.1 Raw materials shall be of such quality and purity that
practical.
the finished product will have the properties and characteristics
5.4 All tests are to be conducted at room temperature (65 to
prescribed in this specification.
80°F) (18 to 27°C).
3.2 The material shall be finished by such operations (cold
working, annealing, turning, grinding, pickling) as are required
6. General Requirements
to produce the prescribed properties.
6.1 SpecificationB 476shallapplytoallmaterialsproduced
4. Chemical Composition
to this specification.
4.1 Material produced under the specification shall meet the
7. Inspection and Testing
requirements for chemical composition prescribed in Table 1.
7.1 Material furnished under this specification shall be
5. Mechanical and Electrical Requirements
inspected by the manufacturer as follows:
7.1.1 Visual inspection of 103,
5.1 The contract or order may specify ultimate tensile
7.1.2 Temper test (hardness or tensile),
strength, elongation, microhardness (Knoop or Vickers), hard-
7.1.3 Dimensional tests, and
7.1.4 Spectrographic or chemic
...