ASTM B 562 - 95 (Reapproved 2005) Standard Specification for Refined Gold

American Society for Testing and Materials (ASTM). Current edition approved May 1, 2005. Published June 2005. Originally approved in 1972. Last previous edition approved in 1999 as B 562 – 95 (1999). 4 p. This specification covers refined gold in cast bar form (Note 1):
Grade 99.5—Gold having a minimum fineness of 995.
Grade 99.95— Gold having a minimum fineness of 999.5.
Grade 99.99— Gold having a minimum fineness of 999.9.
Grade 99.995— Gold having a minimum fineness of 999.95.