ASTM B540-21 PDF

ABSTRACT This specification covers an alloy containing palladium, silver, copper, gold, platinum, and zinc in the form of wire, rod, and strip for electrical contacts. The material shall be finished by such operations: cold working, heat treating, annealing, turning, grinding, and pickling. Material shall meet the requirements of chemical composition as specified. Knoop hardness test and tension test shall be made to conform to the specified requirements. Chemical analysis shall be performed by spectrochemical or wet analysis methods. SCOPE 1.1 This specification covers an alloy containing palladium, silver, copper, gold, platinum, and zinc in the form of wire, rod, and strip 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 It is the responsibility of the user 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. 1.4 The following safety hazard caveat pertains only to the test methods portion, Section 6 of this specification. 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. 1.5 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.