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ASTM B692-18

Current Revision

Standard Specification for 75 % Silver-25 % Graphite Sliding Contact Material

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1.1 This specification defines the criteria for composition and other requirements for brushes with a nominal silver content of 75 weight % with the balance being substantially graphite.

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 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


This specification defines the criteria for the chemical composition and other requirements (including physical properties, microstructure, superficial hardness, and specific resistance ) for silver-graphite brushes for sliding electrical contacts. The percentage of silver, graphite, ash in graphite, and total metal impurities are prescribed. The minimum acceptable values for the physical properties such as density, determined by measurement and weight method, and shear strength are given. Typical Rockwell hardness and specific resistance for the material are also specified.


SDO ASTM: ASTM International
Document Number B692
Publication Date Nov. 1, 2018
Language en - English
Page Count 2
Revision Level 18
Supercedes
Committee B02.05
Publish Date Document Id Type View
Nov. 1, 2018 B0692-18 Revision
April 1, 2023 B0692-18R23 Reaffirmation
May 1, 2012 B0692-90R12 Reaffirmation
June 1, 2006 B0692-90R06 Reaffirmation
Jan. 1, 2000 B0692-90R00 Reaffirmation