ASTM B617-98(2004)
(Specification)Standard Specification for Coin Silver Electrical Contact Alloy
Standard Specification for Coin Silver Electrical Contact Alloy
ABSTRACT
This specification covers silver-copper alloy tubing, rod, wire, strip, and sheet material for electrical contacts. The material shall be finished by cold working, heat treating, annealing, turning, grinding, or pickling as are required to produce the prescribed properties. Material produced under this specification shall meet the requirements for chemical composition of silver, copper, zinc, iron, cadmium, lead, nickel, aluminum, and phosphorous. Mechanical properties such as tensile strength, elongation, and hardness shall conform to the prescribed requirements. Materials shall be inspected by visual inspection, temper test, dimensional test, and spectographic or chemical analysis
SCOPE
1.1 This specification covers 90 % silver-10 % copper alloy tubing, rod, wire, strip, and sheet material for electrical contacts.
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 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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Designation: B617 – 98 (Reapproved 2004)
Standard Specification for
Coin Silver Electrical Contact Alloy
This standard is issued under the fixed designation B617; 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.
A
TABLE 1 Chemical Composition
1. Scope
Element Weight %
1.1 This specification covers 90 % silver-10 % copper alloy
Silver 89.6 to 91.0
tubing, rod, wire, strip, and sheet material for electrical
Copper 9.0 to 10.4
contacts.
Zinc 0.06 max
1.2 This standard does not purport to address all of the
Iron 0.05 max
Cadmium 0.05 max
safety concerns, if any, associated with its use. It is the
Lead 0.03 max
responsibility of the user of this standard to become familiar
Nickel 0.01 max
with all hazards including those identified in the appropriate
Aluminum 0.005 max
Phosphorus 0.02 max
Material Safety Data Sheet (MSDS) for this product/material
Total others 0.06 max
as provided by the manufacturer, to establish appropriate
A
Analysis is regularly made for the elements for which specific limits are listed.
safety and health practices, and determine the applicability of
If, however, the presence of “other” elements is suspected or indicated in the
regulatory limitations prior to use.
course of routine analysis, further analysis shall be made to determine that the
totalofthese“other”elementsandthelistedimpuritiesarenotinexcessofthetotal
impurities limit.
2. Referenced Documents
2.1 ASTM Standards:
5. Mechanical Requirements
B277 Test Method for Hardness of Electrical Contact Ma-
terials
5.1 Mechanical properties shall conform to the listings of
B476 Specification for General Requirements for Wrought Table 2 or Table 3.
Precious Metal Electrical Contact Materials
5.2 All test specimens shall be full thickness or diameter
when practical.
3. Manufacture
5.3 All tests are to be conducted at room temperature, about
3.1 Raw materials shall be of such quality and purity that
68°F (20°C).
the finished product will have the properties and characteristics
6. General Requirements
prescribed in this specification.
3.2 The material shall be finished by such operations (cold
6.1 The provisions of Specification B476 shall apply to all
working, heat treating, annealing, turning, grinding, or pick-
materials produced to this specification.
ling) as are required to produce the prescribed properties.
7. Inspection and Testing
4. Chemical Composition
7.1 Material furnished under this specification shall be
4.1 Materialproducedunderthisspecificationshallmeetthe
inspected by the manufacturer as detailed in the applicable
requirements for chemical composition prescribed in Table 1. provisions of Specification B476 and as listed as follows:
7.1.1 Visual inspection at 103.
7.1.2 Temper test (hardness or tension, but not both). A
tensiontestisrecommendedforstripbelow0.030-in.(0.8-mm)
thickness and for wire of any diameter.
This specification is under the jurisdiction of ASTM Committee B02 on
7.1.3 Dimensional tests.
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
7.1.4 Spectrographic or chemical analysis when indicated
B02.05 on Precious Metals and Electrical Contact Materials.
by the purchaser order.
Current edition approved May 1, 2004. Published May 2004. Originally
approved in 1977. Last previous edition approved in 1998 as B617 – 98. DOI:
8. Keywords
10.1520/B0617-98R04.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
8.1 arcing contacts; coin silver alloy; compositions; electri-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
cal contacts; impurities; precious metals; silver alloy; silver
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. copper alloy
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B617 – 98 (2004)
TABLE 2 Mechanical Properties of Sheet and Strip
Reduction inB&S Percent Re- Ultimate Tensile Strength, psi Minimum Elon-
Hardness,
Temper Numbers duction (Ref- (MPa) gationin2
Rockwell 30T
(Reference) erence) min max in., %
A 0 0 36 000 47 000 20 42 to 50
(250) (320)
⁄2 H 2
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:B 617–98 Designation: B617 – 98 (Reapproved 2004)
Standard Specification for
Coin Silver Electrical Contact Alloy
This standard is issued under the fixed designation B617; 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
1.1 This specification covers 90 % silver-10 % copper alloy tubing, rod, wire, strip, and sheet material for electrical contacts.
1.2This standard does not purport to address all THE safety concerns, if any, associated with its use. It is the responsibility of
the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
1.3It is the responsibility of the user to become familiar with all hazards including those identified in the appropriate Material
Safety Data Sheet for this product/material as provided by the manufacturer.
1.2 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 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.
2. Referenced Documents
2.1 ASTM Standards:
B277 Test Method for Hardness of Electrical Contact Materials
B476 Specification for General Requirements for Wrought Precious Metal Electrical Contact Materials Materials
3. Manufacture
3.1 Raw materials shall be of such quality and purity that the finished product will have the properties and characteristics
prescribed in this specification.
3.2 The material shall be finished by such operations (cold working, heat treating, annealing, turning, grinding, or pickling) as
are required to produce the prescribed properties.
4. Chemical Composition
4.1 Material produced under this specification shall meet the requirements for chemical composition prescribed in Table 1.
5. Mechanical Requirements
5.1 Mechanical properties shall conform to the listings of Table 2 or Table 3.
5.2 All test specimens shall be full thickness or diameter when practical.
5.3 All tests are to be conducted at room temperature, about 68°F (20°C).
6. General Requirements
6.1 The provisions of Specification B476B476 shall apply to all materials produced to this specification.
7. Inspection and Testing
7.1 Material furnished under this specification shall be inspected by the manufacturer as detailed in the applicable provisions
of Specification B476B476 and as listed as follows:
7.1.1 Visual inspection at 103.
This specification is under the jurisdiction of ASTM Committee B-2B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B2.05 on
Precious Metals.
{1
Current edition approved May 10, 1998. Published October 1998. Originally published as B617–77. Last previous edition B617–83(1993) . on Precious Metals and
Electrical Contact Materials.
Current edition approved May 1, 2004. Published May 2004. Originally approved in 1977. Last previous edition approved in 1998 as B617 – 98.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 03.04.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.
B617 – 98 (2004)
A
TABLE 1 Chemical Composition
Element Weight %
Silver 89.6 to 91.0
Copper 9.0 to 10.4
Zinc 0.06 max
Iron 0.05 max
Cadmium 0.05 max
Lead 0.03 max
Nickel 0.01 max
Aluminum 0.005 max
Phosphorus 0.02 max
Total others 0.06 max
A
Analysis is regularly made for the elements for which specific limits are listed.
If, however, the presence of “other” elements is suspected or indicated in the
course of routine analysis, further analysis shall be made to determine that the
totalofthese“other”elementsandthelistedimpuritiesarenotinexcessofthetotal
impurities limit.
TABLE 2 Mechanical Properties of Sheet and Strip
Reduction inB&S Percent Re- Ultimate Tensile Strength, psi Minimum Elon-
Hardness,
Temper Numbers duction (Ref- (MPa) ga
...
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