ASTM B413-97a(2008)
(Specification)Standard Specification for Refined Silver
Standard Specification for Refined Silver
ABSTRACT
This specification deals with refined silver cast bar form in three different grades as indicated by the degree of fineness of silver: Grade 99.90 (UNS P07020) which is also commonly referred to as commercial bar or bullion; Grade 99.95 (UNS P07015); and Grade 99.99 (UNS P07010). The material shall be produced by any process and shall conform to the chemical composition requirements for silver, copper, bismuth, iron, lead, palladium, selenium, and tellurium as shall be determined by any destructive or nondestructive method of chemical analysis. The bar shall be cast with a brand and shall be marked with the minimum fineness together with the melt number, bar number, and weight for identification.
SCOPE
1.1 This specification covers refined silver cast bar form in three grades as follows:
1.1.1 Grade 99.90 (UNS P07020)—Silver having a minimum fineness of 999.0 commonly referred to as “commercial bar” or “bullion.”
1.1.2 Grade 99.95 (UNS P07015)—Silver having a minimum fineness of 999.5.
1.1.3 Grade 99.99 (UNS P07010)—A premium grade having a minimum fineness of 999.9.
1.2 The values stated in inch-pound units are to be regarded as 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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:B413 −97a(Reapproved 2008)
Standard Specification for
Refined Silver
This standard is issued under the fixed designation B413; 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 silver shall be produced by any process that yields
1.1 This specification covers refined silver cast bar form in
a product capable of meeting the requirements of this specifi-
three grades as follows:
cation.
1.1.1 Grade 99.90 (UNS P07020)—Silver having a mini-
3.2 The bars shall be of a quality generally acceptable to the
mum fineness of 999.0 commonly referred to as “commercial
trade.
bar” or “bullion.”
3.3 The manufacturer shall use care to have each shipment
1.1.2 Grade 99.95 (UNS P07015)—Silver having a mini-
of as uniform quality as possible.
mum fineness of 999.5.
1.1.3 Grade 99.99 (UNS P07010)—A premium grade hav-
4. Chemical Composition
ing a minimum fineness of 999.9.
4.1 The refined silver shall conform to the chemical com-
1.2 The values stated in inch-pound units are to be regarded
position prescribed in Table 1.
as standard.
5. Lots
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5.1 A single melt shall constitute a lot for sampling.
responsibility of the user of this standard to become familiar
with all hazards, including those identified in the appropriate
6. Method of Analysis
Material Safety Data Sheet (MSDS) for this product/material
6.1 The composition of the bars or samples shall be deter-
as provided by the manufacturer, to establish appropriate
mined by any destructive or nondestructive method agreed
safety and health practices, and determine the applicability of
upon between the manufacturer and the purchaser. Unless
regulatory limitations prior to use.
otherwise specifically agreed, chemical methods will be used
for analysis. The chemical composition of the materials set
2. Referenced Documents
forth in this specification shall be determined, in case of
3 disagreement, in accordance with Test Method E378. The
2.1 ASTM Standards:
selection of methods for the determination of elements not
E29 Practice for Using Significant Digits in Test Data to
covered by that test method shall be a matter of agreement
Determine Conformance with Specifications
between the manufacturer and the purchaser.
E378 Test Method for Spectrographic Analysis of Silver by
the Powder Technique (Withdrawn 2004)
7. Sampling
7.1 The value of this material is such that special attention
must be paid to sampling procedures. If the purchaser and the
This specification is under the jurisdiction of ASTM Committee B02 on
manufacturer agree that samples most representative of the
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
assay value of a melt are required, the samples should be taken
B02.05 on Precious Metals and Electrical Contact Materials.
Current edition approved May 1, 2008. Published June 2008. Originally
from the silver melt as it is ready for pouring into molds. The
approved in 1964. Last previous edition approved in 2003 as B413 – 97a (2003).
samples should consist of shot or cast pins.
DOI: 10.1520/B0413-97AR08.
Other forms of unfabricated silver of commerce are not to be excluded under
7.2 On agreement between manufacturer and purchaser, an
this specification.
alternative sampling procedure may be used.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.3 The amount of sample taken shall be sufficient to supply
Standards volume information, refer to the standard’s Document Summary page on
three portions for analysis; the mass of each portion shall be
the ASTM website.
sufficient to permit the determination of its composition as set
The last approved version of this historical standard is referenced on
www.astm.org. forth in Table 1.
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B413−97a (2008)
TABLE 1 Chemical Requirements
9. Claims
NOTE 1—The following applies to all specified limits in this table: For 9.1 Claims to be considered shall be made to the manufac-
purposes of determining conformance with this specification, an observed
turer in writing within 30 days of receipt of the material at the
value obtained from analysis shall be rounded off “to the nearest unit” in
purchaser’s plant, and the results of the tests made by the
the last right-hand place of figures used in expressing the limiting value,
purchaser shall accompany such claims. The manufacturer
in accordance with the rounding-off method of Practice E29.
shall be given 1 week from the date of receipt of the complaint
Composition, %
to investigate his records, and shall then agree either to satisfy
Grade Grade Grade
A,B
Element 99.90 99.95 99.99
the claim or to submit samples to an umpire. No claim shall be
(UNS (UNS (UNS
considered unless a portion of the original
...
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