ASTM B562-95(2021)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B562 −95 (Reapproved 2021)
Standard Specification for
Refined Gold
This standard is issued under the fixed designation B562; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.1 This specification covers refined gold in cast bar form
E1446 Test Method for Chemical Analysis of Refined Gold
(Note 1).
by Direct Current Plasma Atomic Emission Spectrometry
1.1.1 Grade 99.5—Gold having a minimum fineness of 995.
1.1.2 Grade 99.95—Gold having a minimum fineness of
3. Materials and Manufacture
999.5.
1.1.3 Grade 99.99—Gold having a minimum fineness of
3.1 The metal may be produced by any process that yields a
999.9.
product capable of meeting the requirements of this specifica-
1.1.4 Grade 99.995—Gold having a minimum fineness of
tion. The purchaser, upon request, shall be informed of the
999.95.
refining process used.
NOTE 1—Other forms of unfabricated gold of commerce are not to be
3.2 The bars shall be of a quality generally acceptable to the
excluded under this specification.
trade.
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
4. Chemical Composition
conversions to SI units that are provided for information only
4.1 The refined gold shall conform to the chemical compo-
and are not considered standard.
sition prescribed in Table 1.
1.3 This standard does not purport to address all of the
NOTE 2—For purposes of determining conformance with this
safety concerns, if any, associated with its use. It is the
specification, an observed value obtained from analysis shall be rounded
responsibility of the user of this standard to become familiar
to the nearest unit in the last right-hand place of figures used in expressing
with all hazards including those identified in the appropriate
the limiting value, in accordance with the rounding method of Practice
E29.
Safety Data Sheet (SDS) for this product/material as provided
by the manufacturer, to establish appropriate safety, health,
and environmental practices, and determine the applicability 5. Sampling
of regulatory limitations prior to use.
5.1 On agreement between the manufacturer and the
1.4 This international standard was developed in accor-
purchaser, a sample may be taken from the melt before pouring
dance with internationally recognized principles on standard-
(Note 3). The sample shall be in the form of shot or pins (Note
ization established in the Decision on Principles for the
4 and Note 5).
Development of International Standards, Guides and Recom-
NOTE 3—Asingle melt or bar(s) cast from a single melt shall constitute
mendations issued by the World Trade Organization Technical
a lot for sampling.
Barriers to Trade (TBT) Committee.
NOTE 4—Pins of ⁄8 in. (9.5 mm) or other suitable diameter may be cast
into graphite molds or drawn into evacuated glass tubes. In some cases it
2. Referenced Documents
may be necessary to draw the glass tube pins through 60-grit emery paper
before acid leaching to remove adhering glass particles.
2.1 ASTM Standards:
NOTE 5—In order to avoid surface contamination, the sample, irrespec-
tive of its nature, is to be leached in hot 1 + 1 HCl for 5 min, washed in
water, rinsed twice in alcohol or acetone, and dried in a muffle at 110°C
This specification is under the jurisdiction of ASTM Committee B02 on
before portions are taken for analysis.
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.05 on Precious Metals and Electrical Contact Materials.
5.2 On agreement between manufacturer and purchaser an
Current edition approved Nov. 1, 2021. Published December 2021. Originally
alternative sampling procedure may be used.
approved in 1972. Last previous edition approved in 2017 as B562 – 95 (2017).
DOI: 10.1520/B0562-95R21.
5.3 The amount of sample taken shall be sufficient to supply
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
three portions for analysis; the mass of each portion shall be
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
sufficient to permit the determination of its composition as set
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. forth in Table 1.
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B562−95 (2021)
TABLE 1 Chemical Requirements
Composition,%
A
Element
Grade 99.5 Grade 99.95 Grade 99.99 Grade 99.995
Gold, min 99.5 . . .
Gold, min (by difference) . 99.95 99.99 99.995
Silver + copper, max . 0.04 . .
Silver, max . 0.035 0.009 0.001
Copper, max . 0.02 0.005 0.001
Palladium, max . 0.02 0.005 0.001
Iron, max . 0.005 0.002 0.001
Lead, max . 0.005 0.002 0.001
Silicon, max . . 0.005 0.001
Magnesium, max . . 0.003 0.001
Arsenic, max . . 0.003 .
Bismuth, max . . 0.002 0.001
Tin, max . . 0.001 0.001
Chromium, max . . 0.0003 0.0003
Nickel, max . . 0.0003 .
Manganese, max . . 0.0003 0.0003
A
By agreement between manufacturer and purchaser analyses may be required and limits established for elements not specified in this table.
5.4 After mixing thoroughly, the sample shall be divided 7.2 Investigation of Claims—In a question of chemical
into three parts, each placed in a package and sealed; one for
composition, a sample shall be drawn by representatives of
the manufacturer, one for the purchaser, and one for the
both parties in accordance with Section 5. The sample shall be
umpire.
suitably separated into three parts, each of which shall be
placed in a sealed package, one for the manufacturer, one for
5.5 All tools required are to be reserved exclusively for this
the purchaser, and one for an umpire, if necessary. The
work.
manufacturer and the purchaser shall each make an analysis,
6. Method of Analysis
and if the results do not establish or dismiss the claim to the
6.1 Chemical composition of the materials set forth in this satisfaction of both parties, the third sample shall be submitted
specification shall be determined, in case of disagreement, in
to a mutually agreeable umpire, who shall determine the
accordance with Test Method E1446. The selection of test
question of fact, and whose determination shall be final.
methods for the determination of elements not covered by that
test method shall be a matter of agreement between the
8. Settlement of Claims
manufacturer and the purchaser.
8.1 The expenses of the manufacturer’s representative and
6.2 Chemical composition of materials required for Grade
oftheumpireshallbepaidbytheloserordividedinproportion
99.5 refined gold shall be determined by a test method similar
to the concession made in case of compromise. In the case of
to the fire assay test method listed in the appendix.
rejection being established, the damages shall be limited t
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