ASTM B413-97a(2003)

1.1 This specification covers refined silver cast bar form in three grades as follows:

1.1.1 Grade 99.90 (UNS P07020) - Silver having a minimum fineness of 999.0 commonly referred to as "commercial bar" or "bullion."

1.1.2 Grade 99.95 (UNS P07015) - Silver having a minimum fineness of 999.5.

1.1.3 Grade 99.99 (UNS P07010) - A premium grade having a minimum fineness of 999.9.

1.2 The values stated in inch-pound units are to be regarded as the 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 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.