ASTM B683-90(1995)e1

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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.
e1
Designation: B 683 – 90 (Reapproved 1995) An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
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. Consult the DoD Index of Specifications and
Standards for the specific year of issue which has been adopted by the Department of Defense.
e NOTE—Section 8 was added editorially in June 1995.
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
Total other impurities (within the following limits) 0.1 max
may be approximate.
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.
fined material) are covered in Specification B 589.
1.4 It is the responsibility of the user to become familiar
4.2 By agreement between the purchaser and the manufac-
with all hazards including those identified in the appropriate
turer, analysis may be required and limits established for
Material Safety Data Sheet for this product/material as pro-
elements or compounds not specified in the table of chemical
vided by the manufacturer.
composition.
2. Referenced Documents
5. Mechanical Requirements
2.1 ASTM Standards:
B 476 Specification for General Requirements for Wrought 5.1 The criterion for temper designation shall be one of the
Precious Metal Electrical Contact Materials following: Rockwell, Rockwell superficial, microhardness
B 589 Specification for Refined Palladium (Vickers or Knoop), or tensile strength (hardness or tension,
but not both) as defined in the contract or order.
3. Manufacture
5.2 Mechanical properties shall conform to the listings of
3.1 Raw materials shall be of such quality and purity that
Table 2.
the finished product will have the properties and characteristics
5.3 Since it is not always possible to tension test some parts
prescribed in this specification.
and shapes, the user and supplier should reach an agreement
3.2 The material shall be finished by such operations (cold
with respect to the type of hardness tests and the acceptable
working, annealing, turning, grinding, or pickling) as are
range that should be applicable. See Table 3 for typical
required to produce the prescribed properties.
hardness values.
5.4 All test specimens shall be full size when practical.
4. Chemical Composition
5.5 All tests shall be conducted at room temperature, 65 to
4.1 Material produced under
...