ASTM B685-01(2006)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: B685 – 01 (Reapproved 2006)
Standard Specification for
Palladium-Copper Electrical Contact Material
This standard is issued under the fixed designation B685; 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.
1. Scope 3.2 The material shall be finished by such operations (cold
working, annealing, turning, grinding, or pickling) as are
1.1 Thisspecificationcoversa60 %palladium-40 %copper
required to produce the prescribed properties.
alloy in the form of rod, wire, strip, and sheet material for
electrical contacts.
4. Chemical Composition
1.2 The values stated in inch-pound units are to be regarded
4.1 Material produced under the specification shall meet the
as the standard. The values in parentheses are for information
requirements of chemical composition prescribed in Table 1.
only.
4.2 By agreement between purchaser and manufacturer,
1.3 This standard does not purport to address all of the
analysis may be required and limits established for elements or
safety concerns, if any, associated with its use. It is the
compounds not specified in the table of chemical composition.
responsibility of the user of this standard to become familiar
with all hazards including those identified in the appropriate
5. Mechanical Requirements
Material Safety Data Sheet (MSDS) for this product/material
5.1 The contract or order may specify ultimate tensile
as provided by the manufacturer, to establish appropriate
strength, elongation, microhardness (Knoop or Vickers), hard-
safety and health practices, and determine the applicability of
ness (Rockwell or Rockwell Superficial), or a combination of
regulatory limitations prior to use.
these mechanical properties as temper criterion. If the contract
2. Referenced Documents or order does not specify a temper criterion, then the criterion
2 for temper designation will be ultimate tensile strength and
2.1 ASTM Standards:
elongation. Table 2.
B476 Specification for General Requirements for Wrought
5.2 Mechanical properties shall conform to the listings of
Precious Metal Electrical Contact Materials
Table 3.
3. Manufacture 5.3 All test specimens shall be full size when practical.
5.4 All tests are to be conducted at room temperature, 65 to
3.1 Raw materials shall be of such quality and purity that
85°F (18 to 29°C).
the finished product will have the properties and characteristics
prescribed in this specification.
6. General Requirements
6.1 The provisions of Specifications B476 shall apply to all
This specification is under the jurisdiction of ASTM Committee B02 on
materials produced to this specification.
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.05 on Precious Metals and Electrical Contact Materials.
7. Inspection and Testing
Current edition approved June 1, 2006. Published June 2006. Originally
approved in 1981. Last previous edition approved in 2001 as B685 – 01. DOI: 7.1 Material furnished under this specification shall be
10.1520/B0685-01R06.
inspected by the manu
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