Standard Specification for Refined Silver (Includes all amendments and changes 12/2/2021).
NORMA vydaná dňa 1.11.2021
Označenie normy: ASTM B413-97a(2021)
Dátum vydania normy: 1.11.2021
Počet strán: 3
Približná hmotnosť: 9 g (0.02 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
This specification deals with refined silver cast bar form in three different grades as indicated by the degree of fineness of silver: Grade 99.90 (UNS P07020) which is also commonly referred to as commercial bar or bullion; Grade 99.95 (UNS P07015); and Grade 99.99 (UNS P07010). The material shall be produced by any process and shall conform to the chemical composition requirements for silver, copper, bismuth, iron, lead, palladium, selenium, and tellurium as shall be determined by any destructive or nondestructive method of chemical analysis. The bar shall be cast with a brand and shall be marked with the minimum fineness together with the melt number, bar number, and weight for identification.
Keywords:
ICS Number Code 77.150.99 (Other products of non-ferrous metals)