ASTM-B664 › Historical Revision Information
Standard Specification for 80 % Silver-20 % Graphite Sliding Contact Material
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This specification defines the criteria for composition and other requirements for sliding contact materials or brushes with a nominal composition by weight of 20% silver and 80% graphite. Materials shall adhere to specified requirements for chemical composition, density, shear strength, and microstructure. They shall also conform to typical values of Rockwell superficial hardness and specific resistance.
Scope
1.1 This specification defines the criteria for composition and other requirements for brushes with a nominal silver content of 80 %, by weight, with the balance being substantially graphite.
1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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 will 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.
Keywords
electrical contacts; graphite; silver; sliding contacts; Electrical contact materials (silver alloy); Electrical contact materials (sliding contacts); Silver (electrical/electronic applications)--specifications; Silver-graphite electrical contact alloy; Sliding electrical contacts; ICS Number Code 77.120.99 (Other non-ferrous metals and their alloys)
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77.120.99 (Other non-ferrous metals and their alloys)
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Document Number
ASTM-B664-90(2012)
Revision Level
1990 R12 EDITION
Status
Superseded
Modification Type
Reapproval
Publication Date
May 15, 2012
Document Type
Specification
Page Count
2 pages
Committee Number
B02.05