ASTM B683-01

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 683 – 01
Standard Specification for
1
Pure Palladium Electrical Contact Material
This standard is issued under the fixed designation B 683; 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 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 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 4.2 By agreement between the purchaser and the manufac-
turer, analysis may be required and limits established for
with all hazards including those identified in the appropriate
elements or compounds not specified in the table of chemical
Material Safety Data Sheet for this product/material as pro-
composition.
vided by the manufacturer.
5. Mechanical Requirements
2. Referenced Documents
5.1 The contract or order may specify ultimate tensile
2.1 ASTM Standards:
strength, elongation, microhardness (Knoop or Vickers), hard-
B 476 Specification for General Requirements for Wrought
2
ness (Rockwell or Rockwell Superficial), or a combination of
Precious Metal Electrical Contact Materials
2
these mechanical properties as temper criterion. If the contract
B 589 Specification for Refined Palladium
or order does not specify a temper criterion, then the criterion
3. Manufacture
for temper designation will be ultimate tensile strength and
3.1 Raw materials shall be of such quality and purity that elongation.
the finished product will have the properties and characteristics 5.2 Mechanical properties shall conform to the listings of
prescribed in this specification. Table 2.
3.2 The material shall be finished by such operations (cold 5.3 Since it is not always possible to tension test some parts
working, annealing, turning, grinding, or pickling) as are and shapes, the user and supplier should reach an agreement
required to produce the prescribed properties. with respect to the type of hardness tests and the acceptable
range that should be applicable. See Table 3 for typical
4. Chemical Composition
hardness values.
4.1 Materialproducedunderthisspecificationshallmeetthe
5.4 All test specimens shall be full size when practical.
requirements of chemical composition prescribed in Table 1. 5.5 All tests shall be conducted at room temperature, 65 to
85°F (18 to 29°C).
NOTE 1—The chemical requirements for unfabricated palladium (re-
fined material) are covered in Specification B 589.
6. General Requirements
6.1 The provisions of Specification B 476 shall apply to all
1
This test method is under the jurisdiction
...