ASTM B683-01(2006)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: B683 – 01 (Reapproved 2006)
Standard Specification for
Pure Palladium Electrical Contact Material
This standard is issued under the fixed designation B683; 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.
TABLE 1 Chemical Requirements
1. Scope
1.1 This specification covers palladium in the form of rod,
Element Weight, %
wire, strip, and sheet material for electrical contacts.
Pd 99.8 min
1.2 The values stated in inch-pound units are to be regarded
Total impurities 0.2 max
as the standard. The metric equivalents of inch-pound units
Pt group (Ir, Pt, Rh, Os, Ru) and Au, Ag, Cu 0.1 max
may be approximate.
Total other impurities (within the following limits) 0.1 max
Pb, Sb, Bi, Sn, As, Cd, Zn 0.01 max each
1.3 This standard does not purport to address all of the
Fe 0.015 max
safety concerns, if any, associated with its use. It is the
Other elements 0.02 max each
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
fined material) are covered in Specification B589.
safety and health practices, and determine the applicability of
4.2 By agreement between the purchaser and the manufac-
regulatory limitations prior to use.
turer, analysis may be required and limits established for
elements or compounds not specified in the table of chemical
2. Referenced Documents
composition.
2.1 ASTM Standards:
B476 Specification for General Requirements for Wrought
5. Mechanical Requirements
Precious Metal Electrical Contact Materials
5.1 The contract or order may specify ultimate tensile
B589 Specification for Refined Palladium
strength, elongation, microhardness (Knoop or Vickers), hard-
ness (Rockwell or Rockwell Superficial), or a combination of
3. Manufacture
these mechanical properties as temper criterion. If the contract
3.1 Raw materials shall be of such quality and purity that
or order does not specify a temper criterion, then the criterion
the finished product will have the properties and characteristics
for temper designation will be ultimate tensile strength and
prescribed in this specification.
elongation.
3.2 The material shall be finished by such operations (cold
5.2 Mechanical properties shall conform to the listings of
working, annealing, turning, grinding, or pickling) as are
Table 2.
required to produce the prescribed properties.
5.3 Since it is not always possible to tension test some parts
and shapes, the user and supplier should reach an agreement
4. Chemical Composition
with respect to the type of hardness tests and the acceptable
4.1 Materialproducedunderthisspecificationshallmeetthe
range that should be applicable. See Table 3 for typical
requirements of chemical composition prescribed in Table 1.
hardness values.
NOTE 1—The chemical requirements for unfabricated palladium (re-
5.4 All test specimens shall be full size when practical.
5.5 All tests shall be conducted at room temperature, 65 to
85°F (18 to 29°C).
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
6. General Requirements
B02.05 on Precious Metals and Electrical Contact Materials.
6.1 The provisions of Specificatio
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