ASTM B476-01(2006)
(Specification)Standard Specification for General Requirements for Wrought Precious Metal Electrical Contact Materials
Standard Specification for General Requirements for Wrought Precious Metal Electrical Contact Materials
ABSTRACT
This specification covers general requirements common to wrought precious metal electrical contact alloy products in the form of sheet, strip, wire, and rod. The raw material shall be of such quality and purity that the finished product shall have the properties and characteristics prescribed in the applicable product specification. The product shall be produced by a combination of hot or cold working operations, it shall be finished, unless otherwise specified, by cold working, annealing, or heat treatment as may be necessary to meet the specified properties. Surfaces of all material furnished to this specification shall be smooth, clean, and free from scratches, stains, rough spots, slivers, laps, scale, pits, and any other injurious defects. Test methods such as chemical analysis and physical tests shall be performed accordingly.
SCOPE
1.1 This specification covers general requirements common to wrought precious metal electrical contact alloy products in the form of sheet, strip, wire, and rod. Unless otherwise specified in the purchase order or in an individual specification, these general requirements shall apply to wrought electrical contact materials where indicated in the applicable product specifications issued by ASTM.
1.2 In case of conflict, the requirements on the purchase order, the individual specification, and this general specification shall prevail in the sequence named.
1.3 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units may be approximate.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the 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 safety and health practices, and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B476 – 01 (Reapproved 2006)
Standard Specification for
General Requirements for Wrought Precious Metal Electrical
1
Contact Materials
This standard is issued under the fixed designation B476; 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 B772 Guide for Specifying the Chemical Compositions for
Electrical Contact Materials (Arcing and Nonarcing)
1.1 This specification covers general requirements common
E3 Guide for Preparation of Metallographic Specimens
to wrought precious metal electrical contact alloy products in
E8 Test Methods for Tension Testing of Metallic Materials
the form of sheet, strip, wire, and rod. Unless otherwise
E29 Practice for Using Significant Digits in Test Data to
specifiedinthepurchaseorderorinanindividualspecification,
Determine Conformance with Specifications
these general requirements shall apply to wrought electrical
E55 Practice for Sampling Wrought Nonferrous Metals and
contact materials where indicated in the applicable product
Alloys for Determination of Chemical Composition
specifications issued by ASTM.
E112 Test Methods for Determining Average Grain Size
1.2 In case of conflict, the requirements on the purchase
E384 Test Method for Microindentation Hardness of Mate-
order, the individual specification, and this general specifica-
rials
tion shall prevail in the sequence named.
1.3 The values stated in inch-pound units are to be regarded
3. Terminology
as standard. The values given in parentheses are mathematical
3.1 Definition:
conversions to SI units that are provided for information only
3.1.1 lot, n—the quantity of material of the same type, size,
and are not considered standard.
and finish produced at one time from the same cast or heat, and
1.4 This standard does not purport to address all of the
heat treated in the same heat-treatment cycle.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to become familiar
4. Ordering Information
with all hazards including those identified in the appropriate
4.1 Orders for material to this specification shall include the
Material Safety Data Sheet (MSDS) for this product/material
following information:
as provided by the manufacturer, to establish appropriate
4.1.1 Designation and revision date of this specification.
safety and health practices, and determine the applicability of
4.1.1.1 Ifarevisiondateisnotdesignated,thelatestrevision
regulatory limitations prior to use.
should be used.
4.1.2 Designation and revision date of the applicable prod-
2. Referenced Documents
uct specification.
The following documents of the issue in effect, on the date
4.1.2.1 Ifarevisiondateisnotdesignated,thelatestrevision
of material purchase, form a part of this specification to the
of the product specification should be used.
extent referenced herein:
2 4.1.3 Description of material form,
2.1 ASTM Standards:
4.1.4 Dimensions of the material,
B63 Test Method for Resistivity of Metallically Conducting
4.1.5 Total quantity of each size,
Resistance and Contact Materials
4.1.6 Temper of the material (annealed, cold worked, etc.),
4.1.7 Temper test (hardness or tensile) (Section 10),
1
This specification is under the jurisdiction of ASTM Committee B02 on
4.1.8 Special requirements (if any), and
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
4.1.9 Certification (Section 14).
B02.05 on Precious Metals and Electrical Contact Materials.
4.2 Specify the following, if required:
Current edition approved June 1, 2006. Published June 2006. Originally
approved in 1968. Last previous edition approved in 2001 as B476 – 01. DOI: 4.2.1 Certificate of compliance of physical and chemical
10.1520/B0476-01R06.
requirement.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.2.2 Test Data—Specifytestsandanalysestobeperformed
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
and reported.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B476 – 01 (2006)
4.2.3 Special packaging, if required. discuss flatness requirements. It is not a requirement of this
specification, unless agreed upon and made part of the pur-
5. Materials and Manufacture
chase order or request for quotation. The flatness of a flat form
shall be that the maximum devi
...
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