ASTM B562-95(2012)
(Specification)Standard Specification for Refined Gold
Standard Specification for Refined Gold
ABSTRACT
This specification covers refined gold of Grades 99.5, 99.95, 99.99, and 99.995 in cast bar forms. Other forms of unfabricated gold of commerce are not to be excluded under this specification. The metal may be produced by any refining process that yields products capable of meeting the specified chemical composition requirements. Chemical assessment samples may be taken from the melt before pouring and shall be in the form of shots or pins, or by other alternative means on agreement between the manufacturer and purchaser.
SCOPE
1.1 This specification covers refined gold in cast bar form (Note 1).
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 999.5.
1.1.3 Grade 99.99—Gold having a minimum fineness of 999.9.
1.1.4 Grade 99.995—Gold having a minimum fineness of 999.95. Note 1—Other forms of unfabricated gold of commerce are not to be excluded under this specification.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
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Designation:B562 −95(Reapproved 2012)
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 3. Materials and Manufacture
3.1 The metal may be produced by any process that yields a
1.1 This specification covers refined gold in cast bar form
product capable of meeting the requirements of this specifica-
(Note 1).
tion. The purchaser, upon request, shall be informed of the
1.1.1 Grade 99.5—Gold having a minimum fineness of 995.
refining process used.
1.1.2 Grade 99.95—Gold having a minimum fineness of
3.2 The bars shall be of a quality generally acceptable to the
999.5.
trade.
1.1.3 Grade 99.99—Gold having a minimum fineness of
999.9.
4. Chemical Composition
1.1.4 Grade 99.995—Gold having a minimum fineness of
4.1 The refined gold shall conform to the chemical compo-
999.95.
sition prescribed in Table 1.
NOTE 1—Other forms of unfabricated gold of commerce are not to be
NOTE 2—For purposes of determining conformance with this
excluded under this specification.
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
1.2 The values stated in inch-pound units are to be regarded
the limiting value, in accordance with the rounding method of Practice
as standard. The values given in parentheses are mathematical
E29.
conversions to SI units that are provided for information only
5. Sampling
and are not considered standard.
5.1 On agreement between the manufacturer and the
1.3 This standard does not purport to address all of the
purchaser, a sample may be taken from the melt before pouring
safety concerns, if any, associated with its use. It is the
(Note 3). The sample shall be in the form of shot or pins (Note
responsibility of the user of this standard to become familiar
4 and Note 5).
with all hazards including those identified in the appropriate
Material Safety Data Sheet (MSDS) for this product/material
NOTE 3—Asingle melt or bar(s) cast from a single melt shall constitute
as provided by the manufacturer, to establish appropriate
a lot for sampling.
NOTE 4—Pins of ⁄8 in. (9.5 mm) or other suitable diameter may be cast
safety and health practices, and determine the applicability of
into graphite molds or drawn into evacuated glass tubes. In some cases it
regulatory limitations prior to use.
may be necessary to draw the glass tube pins through 60-grit emery paper
before acid leaching to remove adhering glass particles.
2. Referenced Documents
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
2.1 ASTM Standards:
water, rinsed twice in alcohol or acetone, and dried in a muffle at 110°C
E29 Practice for Using Significant Digits in Test Data to
before portions are taken for analysis.
Determine Conformance with Specifications
5.2 On agreement between manufacturer and purchaser an
E1446 Test Method for Chemical Analysis of Refined Gold
alternative sampling procedure may be used.
by Direct Current Plasma Emission Spectrometry
5.3 The amount of sample taken shall be sufficient to supply
three portions for analysis; the mass of each portion shall be
sufficient to permit the determination of its composition as set
This specification is under the jurisdiction of ASTM Committee B02 on
forth in Table 1.
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.05 on Precious Metals and Electrical Contact Materials.
5.4 After mixing thoroughly, the sample shall be divided
Current edition approved Nov. 1, 2012. Published November 2012. Originally
into three parts, each placed in a package and sealed; one for
approved in 1972. Last previous edition approved in 2005 as B562 – 95 (2005).
the manufacturer, one for the purchaser, and one for the
DOI: 10.1520/B0562-95R12.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or umpire.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.5 All tools required are to be reserved exclusively for this
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. work.
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B562−95(2012)
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.
6. Method of Analysis both parties in accordance with Section 5. The sample shall be
suitably separated into three parts, each of which shall be
6.1 Chemical composition of the materials set forth in this
placed in a sealed package, one for the manufacturer, one for
specification shall be determined, in case of disagreement, in
the purchaser, and one for an umpire, if necessary. The
accordance with Test Method E1446. The selection of test
manufacturer and the purchaser shall each make an analysis,
methods for the determination of elements not covered by that
and if the results do not establish or dismiss the claim to the
test method shall be a matter of agreement between the
satisfaction of both parties, the third sample shall be submitted
manufacturer and the purchaser.
to a mutually agreeable umpire, who shall determine the
6.2 Chemical composition of materials required for Grade
question of fact, and whose determination shall be final.
99.5 refined gold shall be determined by a test method similar
to the fire assay test method listed in the appendix. 8. Settlement of Claims
8.1 The expenses of the manufacturer’s representative and
7. Rejection and Rehearing
oftheumpireshallbepaidbytheloserordividedinproportion
7.1 Rejection:
to the concession made in case of compromise. In the case of
7.1.1 Claims to be considered shall be made to the manu-
rejection being established, the damages shall be limited to the
facturer in writing within 30 days of receipt of the material at
payment of transportation charges both ways by the manufac-
the purchaser’s plant, and the results of tests made by the
turer for substitution of an equiv
...
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