ASTM B561-94(1999)e1

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e1
Designation: B 561 – 94 (Reapproved 1999)
Standard Specification for
Refined Platinum
This standard is issued under the fixed designation B 561; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
e NOTE—UNS number was added in June 1999.
1. Scope 4. Chemical Composition
1.1 This specification covers refined platinum as sponge, 4.1 The refined platinum shall conform to the chemical
cast bar, and wrought forms (Note 1) in two grades as follows: composition prescribed in Table 1.
1.1.1 Grade 99.95 (UNS PO4995)— Platinum having a
5. Sampling
purity of 99.95 %, min, and
1.1.2 Grade 99.99— Platinum having a purity of 99.99 % 5.1 The value of this material is such that special attention
must be paid to sampling procedures. The purchaser and
min.
manufacturer shall agree upon the sampling procedures used.
NOTE 1—Other forms of unfabricated platinum of commerce are not to
5.2 Lot Size—Sampling lots shall consist of the following:
be excluded under this specification.
5.2.1 Sponge—A single refining lot, and
NOTE 2—For the purposes of determining conformance with this
5.2.2 Other Forms— A single melt or primary consolida-
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
tion.
the limiting value, in accordance with the rounding off method of Practice
E 29.
1.2 The values stated in inch-pound units are to be regarded
as the standard. SI units are provided for information only.
2. Referenced Documents
2.1 ASTM Standards:
E 29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
3. Materials and Manufacture
3.1 The metal may be produced by any refining process that
yields a product capable of meeting the chemical requirements
of this specification. The purchaser, upon request, shall be
informed of the refining process used.
3.2 The surfaces of bars and wrought forms shall exhibit
quality generally acceptable to the trade.
This specification is under the jurisdiction of ASTM Committee B-2 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.05 on Precious Metals.
Current edition approved Feb. 15, 1994. Published April 1994. Originally
published as B 561 – 72. Last previous edition B 561 – 86.
Annual Book of ASTM Standards, Vol 14.02.
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