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ASTM B662-94(2012)

Current Reaffirmation

Standard Specification for Silver-Molybdenum Electrical Contact Material

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1.1 This specification covers electrical contact components made from silver-molybdenum by powder metallurgical procedures.

1.2 This specification covers compositions within the silver-molybdenum system normally specified by users of contacts.

1.3 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 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.

This specification covers electrical contact components made from silver-molybdenum by powder metallurgical procedures. Chemical analysis of the samples shall be done to determine their chemical composition. The material shall be finished by different methods like braze alloy backing, tumbling to polish surfaces, special surface finish, and cleaning.


Proprietary methods for the manufacture of these materials vary significantly among suppliers, and these methods influence such properties as arc erosion, contact resistance, and the tendency to weld in service. Since the performance of contacts in a device depends on numerous factors outside the contact itself (opening speed, closing speed, contact pressure, contact bounce, environmental variations, assembly technique and variations, etc.), this specification cannot ensure performance control in the application. As part of the qualification on initial samples, it is recommended that the user functionally and electrically test the materials for all devices applicable to the material's use. This specification will provide a means for the contact manufacturer and contact user to reach agreement on the details of the material to be supplied for a specific use, and reasonable assurance that future lots will be similar in properties and microstructure to the initial test or sample contacts supplied.

SDO ASTM: ASTM International
Document Number B662
Publication Date May 1, 2012
Language en - English
Page Count 3
Revision Level 94(2012)
Supercedes
Committee B02.05
Publish Date Document Id Type View
May 1, 2012 B0662-94R12 Reaffirmation
June 1, 2006 B0662-94R06 Reaffirmation
May 10, 2000 B0662-94R00 Reaffirmation