This specification covers 72% silver-28% copper (eutectic) alloy rod, wire, strip, and sheet material for electrical contacts. The material shall be finished by such operations (cold working, heat treatment, annealing, turning, grinding, or pickling) as are required to produce the prescribed properties. The alloy materials shall conform to the chemical composition and mechanical property requirements. All tests shall be conducted at room temperature.
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1.1 This specification covers 72 % silver-28 % copper (eutectic) alloy rod, wire, strip, and sheet material for electrical contacts.
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 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B277 Test Method for Hardness of Electrical Contact Materials
B476 Specification for General Requirements for Wrought Precious Metal Electrical Contact Materials
composition; electrical contacts; impurities; precious metals; silver copper alloy; Electrical conductors--silver-copper (euctectic) alloy; Electrical contact materials (copper alloy); Electrical contact materials (silver alloy); Eutectic electrical contact alloy; Silver-copper eutectic electrical contact alloy; Silver (electrical/electronic applications)--specifications;
ICS Number Code 77.120.99 (Other non-ferrous metals and their alloys)
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