ASTM International - ASTM B561-94(1999)e1
Standard Specification for Refined Platinum
|Publication Date:||10 May 1999|
|ICS Code (Other non-ferrous metals and their alloys):||77.120.99|
1.1 This specification covers refined platinum as sponge, cast bar, and wrought forms (Note 1) in two grades as follows:
1.1.1 Grade 99.95 -Platinum having a purity of 99.95%, min, and
1.1.2 Grade 99.99 -Platinum having a purity of 99.99% min.
Note 1-Other forms of unfabricated platinum of commerce are not to be excluded under this specification. Note 2-For the purposes of determining conformance with this specification, an observed value obtained from analysis shall be rounded to the nearest unit in the last right hand place of figures used in expressing the limiting value, in accordance with the rounding off method of Practice E29.
1.2 The values stated in inch-pound units are to be regarded as the standard. SI units are provided for information only.