ASTM B685-01(2012)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:B685 −01 (Reapproved 2012)
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 4.2 By agreement between purchaser and manufacturer,
analysis may be required and limits established for elements or
1.1 Thisspecificationcoversa60 %palladium-40 %copper
compounds not specified in the table of chemical composition.
alloy in the form of rod, wire, strip, and sheet material for
electrical contacts.
5. Mechanical 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 (Table 2).
with all hazards including those identified in the appropriate
5.2 Mechanical properties shall conform to the listings of
Material Safety Data Sheet (MSDS) for this product/material
Table 3.
as provided by the manufacturer, to establish appropriate
safety and health practices, and determine the applicability of
5.3 All test specimens shall be full size when practical.
regulatory limitations prior to use.
5.4 All tests are to be conducted at room temperature, 65 to
85°F (18 to 29°C).
2. Referenced Documents
2.1 ASTM Standards:
6. General Requirements
B476 Specification for General Requirements for Wrought
Precious Metal Electrical Contact Materials 6.1 The provisions of Specifications B476 shall apply to all
materials produced to this specification.
3. Manufacture
3.1 Raw materials shall be of such quality and purity that
7. Inspection and Testing
the finished product will have the properties and characteristics
7.1 Material furnished under this specification shall be
prescribed in this specification.
inspected by the manufacturer as listed below:
3.2 The material shall be finished by such operations (cold
7.1.1 Visual inspection in accordance with 11.2.1 in Speci-
working, annealing, turning, grinding, or pickling) as are
fication B476.
required to produce the prescribed properties.
7.1.2 Temper test (hardness or tension, but not both). A
tension test is recommended for strip below 0.030 in. (0.8 mm)
4. Chemical Composition
thickness and for wire of any diameter. A tension test is
4.1 Material produced under the specification shall meet the
preferred when permitted by part size and quantity.
requirements of chemical composition prescribed in Table 1.
7.1.3 Dimensional tests.
7.1.4 Spectrographic or chemical analysis when indicated
This specification is under the jurisdiction of ASTM Committee B02 on
b
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