ASTM B671-81(1999)e1
(Specification)Standard Specification for Refined Iridium
Standard Specification for Refined Iridium
SCOPE
1.1 This specification covers refined iridium as sponge and powder in two grades as follows:
1.1.1 Grade 99.80 -Iridium having a purity of 99.80%.
1.1.2 Grade 99.90 -Iridium having a purity of 99.90%. Note-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 method of Practice E29.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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e1
Designation: B 671 – 81 (Reapproved 1999)
Standard Specification for
Refined Iridium
This standard is issued under the fixed designation B 671; 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.
TABLE 1 Chemical Requirements
1. Scope
Composition, %
1.1 This specification covers refined iridium as sponge and
A
Element
Grade 99.80 Grade 99.90
powder in two grades as follows:
(UNS PO6100)
1.1.1 Grade 99.80 (UNS PO6100)— Iridium having a
Iridium, min (by difference) 99.80 99.90
purity of 99.80 %.
Rhodium, max 0.15 0.05
1.1.2 Grade 99.90— Iridium having a purity of 99.90 %.
Platinum, max 0.10 0.05
Palladium, max 0.05 0.05
NOTE 1—For the purposes of determining conformance with this
Ruthenium, max 0.05 0.05
specification, an observed value obtained from analysis shall be rounded
Lead, max 0.02 0.015
to the nearest unit in the last right-hand place of figures used in expressing Silicon, max 0.02 0.01
Tin, max 0.01 0.01
the limiting value, in accordance with the rounding method of Practice
Zinc, max 0.01 0.01
E 29.
Arsenic, max 0.01 0.005
1.2 The values stated in inch-pound units are to be regarded Bismuth, max 0.01 0.005
Cadmium, max 0.01 0.005
as the standard. The values given in parentheses are for
Iron, max 0.01 0.01
information only.
Silver, max — 0.02
Gold, max — 0.02
2. Referenced Documents Copper, max — 0.02
Nickel, max — 0.02
2.1 ASTM Standards:
Chromium, max — 0.02
E 29 Practice for Using Significant Digits in Test Data to
A
By agreement between manufacturer and purchaser, analyses may be
Determine Conformance with Specifications
required and limits established for elements or compounds not specified in this
table.
3. Materials and Manufacture
3.1 The metal may be produced by any refining process that
5.2.2 Powder—A single refining lot.
yields a product capable of meeting the chemical requirements
of this specification. The purchaser, upon request, shall be
6. Method of Analysis
informed of the refining process used.
6.1 Pending the development of standardASTM methods of
4. Chemical Composition
chemical or spectrographic analysis, or both, the methods to be
used shall be a matter of agreement between manufacturer and
4.1 The refined iridium shall conform to the chemical
the purchaser.
composition prescribed in Table 1.
7. Rejection and Rehearing
5. Sampling
7.1 Material that fails to conform to the requirements of this
5.1 The value of this material is such that special attention
specification may be rejected. Rejection should be reported to
must be paid to sampling procedures. The purchaser
...
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