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Normas ASTM – AENOR
ASTM B663/B663M-16

ASTM B663/B663M-16

Standard Specification for Silver-Tungsten Carbide Electrical Contact Material

Fecha:
2020-10-23 /Historical
Superseeded by:
Abstract:

This specification covers electrical contact components made from silver-tungsten carbide by powder metallurgical procedures. This specification covers compositions within the silver-tungsten carbide system. The material shall conform to composition limits. Chemical analysis shall be performed to deteremine material conformance to specified composition requirements. The contact components shall agree on qualification tests for determination of physical properties. The tests shall be performed on production parts wherever practical or applicable. The test shall be determined after consideration of the function of the part.

Scope:

1.1 This specification covers electrical contact components made from silver-tungsten carbide materials by powder metallurgical processes.

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

Note 1: Table X1.1 and Table X1.2 in Appendix X1 provide a list of typical compositions used for various applications.

1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the 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 Safety Data Sheet (SDS) 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:
arcing contacts; contacts; electrical contacts; powder metallurgy; silver; silver tungsten carbide; tungsten carbide; tungsten carbide silver;
44,17
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