ASTM B616-96(2000)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: B 616 – 96 (Reapproved 2000)
Standard Specification for
Refined Rhodium
This standard is issued under the fixed designation B 616; 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.
TABLE 1 Chemical Requirements
1. Scope
Composition, %
1.1 This specification covers refined rhodium as sponge and
A
Element
Grade Grade Grade
powder in three grades as follows:
99.80 99.90 99.95
1.1.1 Grade 99.80— Rhodium having a purity of 99.80 %,
Rhodium, min (by difference) 99.80 99.90 99.95
1.1.2 Grade 99.90— Rhodium having a purity of 99.90 %,
Platinum, max 0.10 0.05 0.02
and
Iridium, max 0.10 0.05 0.02
1.1.3 Grade 99.95— Rhodium having a purity of 99.95 %. Palladium, max 0.05 0.05 0.005
Ruthenium, max 0.05 0.05 0.01
1.1.4 For the purposes of determining conformance with
Lead, max 0.01 0.01 0.005
this specification, an observed value obtained from analysis
Tin, max 0.01 0.01 0.003
shall be rounded to the nearest unit in the last right-hand place Zinc, max 0.01 0.01 0.003
Arsenic, max 0.01 0.005 0.003
of figures used in expressing the limiting value, in accordance
Bismuth, max 0.01 0.005 0.005
with the rounding method of Practice E 29.
Cadmium, max 0.01 0.005 0.005
Iron, max 0.01 0.01 0.003
2. Referenced Documents Silicon, max — 0.01 0.005
Silver, max — 0.02 0.005
2.1 ASTM Standards:
Gold, max — 0.01 0.003
E 29 Practice for Using Significant Digits in Test Data to Copper, max — 0.01 0.005
2, 3
Nickel, max — 0.01 0.003
Determine Conformance with Specifications
Tellurium, max — 0.01 0.005
Magnesium, max — 0.01 0.005
3. Manufacture
Calcium, max — 0.01 0.005
Aluminum, max — 0.01 0.005
3.1 The material may be produced by any refining process
Chromium, max — 0.01 0.005
that yields a product capable of meeting the chemical require-
Manganese, max — 0.005 0.005
ments of this specification. The purchaser, upon request, shall Antimony, max — 0.005 0.003
Cobalt, max — 0.005 0.001
be informed of the refining process used.
Boron, max — 0.005 0.001
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By agreement between manufacturer and purchaser, analyses may be
4. Chemical Requirements
required and limits established for elements or compounds not specified in this
4.1 The material should conform to the requirements for
table.
chemical composition as prescribed in Table 1.
4.2 Analysis shall be made using the manufacturer’s stan-
5.2 Lot Size—Sampling lots shall consist of the following:
dard methods. In the event of disagreement as to the chemical
5.2.1 Sponge—A single refining lot and
composition of the metal, methods of chemical analysis for
5.2.2 Powder—A single refining lot.
reference purposes shall be determined by a mutually accept-
able laboratory.
6. Rejection and Rehearing
5. Sampling
6.1 Material that fails to conform to the requirements of this
specification may be rejected. Rejection should be reported to
5.1 The value of this material is such that special attention
the
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