ASTM B685-01

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 685 – 01
Standard Specification for
1
Palladium-Copper Electrical Contact Material
This standard is issued under the fixed designation B 685; 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.
A
TABLE 1 Typical Hardness Values for Strip
1. Scope
1.1 Thisspecificationcoversa60 %palladium-40 %copper
B
Temper HR30T HR15T HK (100 g)
alloy in the form of rod, wire, strip, and sheet material for
Annealed 64 82 155
electrical contacts.
1.2 The values stated in inch-pound units are to be regarded
37 % reduction 81 92 255
as the standard. The values in parentheses are for information A
Specification for tensile and elongation properties or hardness ranges, but not
both, shall be agreed to between supplier and purchaser at the time of contracting
only.
for delivery.
1.3 This standard does not purport to address all of the
B
The Knoop hardness indentations shall be made so that the long axis of the
safety concerns, if any, associated with its use. It is the
indenter is parallel to the rolling direction of the material.
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.
5. Mechanical Requirements
1.4 It is the responsibility of the user to become familiar
5.1 The contract or order may specify ultimate tensile
with all hazards including those identified in the appropriate
strength, elongation, microhardness (Knoop or Vickers), hard-
Material Safety Data Sheet for this product or material as
ness (Rockwell or Rockwell Superficial), or a combination of
provided by the manufacturer. Table 1
these mechanical properties as temper criterion. If the contract
or order does not specify a temper criterion, then the criterion
2. Referenced Documents
for temper designation will be ultimate tensile strength and
2.1 ASTM Standards:
elongation.
B 476 Specification for General Requirements for Wrought
5.2 Mechanical properties shall conform to the listings of
2
Precious Metal Electrical Contact Materials
Table 3.
5.3 All test specimens shall be full size when practical.
3. Manufacture
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
3.2 The material shall be finished by such operations (cold
6.1 The provisions of Specifications B 476 shall apply to all
working, annealing, turning, grinding, or pickling) as are
materials produced to this specification.
required to produce the prescribed properties.
4. Chemical Composition
TABLE 2 Chemical Requirements
4.1 Material produced under the specification shall meet the
requirements of chemical composition prescribed in Table 2.
Element Weight, %
4.2 By agreement between purchaser and manufacturer,
Pd Balance
analysis may be required and limits established for elements or
Cu 40.00 6
...