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ASTM B596-89(2012)

(Specification)

Standard Specification for Gold-Copper Alloy Electrical Contact Material

Standard Specification for Gold-Copper Alloy Electrical Contact Material

ABSTRACT
This specification covers wrought gold-copper alloy in the form of wire, rod, strip, and tubing to be used for electrical contacts. Raw materials shall be of such quality and purity that the finished product (produced by cold working, heat treating, annealing, turning, grinding, and/or pickling as required) will have the properties and characteristics prescribed in this specification. The material shall meet the requirements of chemical composition specified for gold, copper, noble metal impurities, and other impurities. Ultimate tensile strength, elongation, microhardness (Knoop or Vickers), hardness (Rockwell or Rockwell Superficial), or a combination of these mechanical properties may be specified as the temper criterion. Annealed and hard drawn wires, strips, and tubings, within the prescribed diameter or thickness, shall conform to the specified tensile strength, elongation, and hardness. The following tests shall be performed: Knoop hardness test, tension test, chemical analysis such as spectrochemical or wet analysis, and stress corrosion crack test by immersion test, compression, and bending.
SCOPE
1.1 This specification covers a wrought alloy containing gold and copper in the form of wire, rod, strip, and tubing for electrical contacts.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 The following precautionary statement pertains to the test method portion only, Section 7, of this standard: 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.

General Information

Status
Historical
Publication Date
30-Apr-2012
ICS
77.120.99 - Other non-ferrous metals and their alloys
Technical Committee
B02 - Nonferrous Metals and Alloys
Drafting Committee
B02.05 - Precious Metals and Electrical Contact Materials and Test Methods
Current Stage
Ref Project

Relations

Replaces
ASTM B596-89(2006) - Standard Specification for Gold-Copper Alloy Electrical Contact Material
Effective Date
01-May-2012

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ASTM B596-89(2012) - Standard Specification for Gold-Copper Alloy Electrical Contact Material
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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:B596 −89(Reapproved 2012)
Standard Specification for
Gold-Copper Alloy Electrical Contact Material
This standard is issued under the fixed designation B596; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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 3.2 The material shall be finished by such operations (cold
working, heat treating, annealing, turning, grinding, pickling)
1.1 This specification covers a wrought alloy containing
as are required to produce the prescribed properties.
gold and copper in the form of wire, rod, strip, and tubing for
electrical contacts.
4. Chemical Composition
1.2 Thevaluesstatedininch-poundunitsaretoberegarded
4.1 Materials produced under the specification shall meet
as standard. The values given in parentheses are mathematical
the requirements of chemical composition shown in Table 1.
conversions to SI units that are provided for information only
and are not considered standard.
5. Mechanical Properties
1.3 The following precautionary statement pertains to the
test method portion only, Section 7, of this standard: This 5.1 The contract or order may specify ultimate tensile
strength, elongation, microhardness (Knoop or Vickers), hard-
standard does not purport to address all of the safety concerns,
if any, associated with its use. It is the responsibility of the user ness (Rockwell or Rockwell Superficial), or a combination of
these mechanical properties as temper criterion. If the contract
of this standard to become familiar with all hazards including
those identified in the appropriate Material Safety Data Sheet or order does not specify a temper criterion, then the criterion
for temper designation will be ultimate tensile strength.
(MSDS) for this product/material as provided by the
manufacturer, to establish appropriate safety and health
5.2 The material shall conform to the mechanical properties
practices, and determine the applicability of regulatory limi-
shown in Table 2, Table 3, Table 4,or Table 5.
tations prior to use.
5.3 The material shall be free of stress corrosion (as tested)
in accordance with 7.3.
2. Referenced Documents
2.1 ASTM Standards:
6. General Requirements
B476Specification for General Requirements for Wrought
6.1 Specification B476 shall apply to all materials produced
Precious Metal Electrical Contact Materials
E8Test Methods for Tension Testing of Metallic Materials to this specification.
E384Test Method for Knoop and Vickers Hardness of
Materials 7. Test Methods
7.1 Test methods shall be in accordance with Specification
3. Materials and Manufacture
B476.
3.1 Raw materials shall be of such quality and purity that
7.1.1 Knoop hardness tests shall be in accordance with Test
thefinishedproductwillhavethepropertiesandcharacteristics
Method E384. Material 0.005 in. (0.13 mm) in thickness (or
prescribed in this specification.
diameter)andlargershallbetestedusinga100-gindenterload.
A minimum of five hardness indentations shall be made on
each specimen. The hardness value reported shall be the
average of the five indentations. Material less than 0.005 in. in
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
thickness (or diameter) shall be tested with a 50-g indenter
B02.05 on Precious Metals and Electrical Contact Materials.
load.
Current edition approved May 1, 2012. Published May 2012. Originally
7.1.2 All tension tests shall be in accordance with Test
approved in 1974. Last previous edition approved in 2006 as B596–89(2006).
DOI: 10.1520/B0596-89R12.
Methods E8 and test specimens shall be full cross section,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
when practical.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.1.3 Alltestsshallbeconductedatroomtemperature,65to
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 85°F (18 to 29°C).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B596−89(2012)
TABLE 1 Chemical Requirements TABLE 5 Mechanical Properties of Tubing (0.025 to 2.0 in. (0.64
to 51 mm) outside diameter)
Element Weight, %
Temper,
Gold 89.0–9
...

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SCOPE
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