ASTM B413-97a(2021)
(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 bar2 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 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 of regulatory limitations prior to use.
1.4 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.
General Information
Relations
Standards Content (Sample)
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: B413 −97a (Reapproved 2021)
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 E378 Test Method for Spectrographic Analysis of Silver by
the Powder Technique (Withdrawn 2004)
1.1 This specification covers refined silver cast bar form in
three grades as follows:
3. Materials and Manufacture
1.1.1 Grade 99.90 (UNS P07020)—Silver having a mini-
mum fineness of 999.0 commonly referred to as “commercial 3.1 The silver shall be produced by any process that yields
bar” or “bullion.” a product capable of meeting the requirements of this specifi-
1.1.2 Grade 99.95 (UNS P07015)—Silver having a mini- cation.
mum fineness of 999.5.
3.2 The bars shall be of a quality generally acceptable to the
1.1.3 Grade 99.99 (UNS P07010)—A premium grade hav-
trade.
ing a minimum fineness of 999.9.
3.3 The manufacturer shall use care to have each shipment
1.2 The values stated in inch-pound units are to be regarded
of as uniform quality as possible.
as standard.
1.3 This standard does not purport to address all of the 4. Chemical Composition
safety concerns, if any, associated with its use. It is the
4.1 The refined silver shall conform to the chemical com-
responsibility of the user of this standard to become familiar
position prescribed in Table 1.
with all hazards, including those identified in the appropriate
Safety Data Sheet (SDS) for this product/material as provided
5. Lots
by the manufacturer, to establish appropriate safety, health,
5.1 A single melt shall constitute a lot for sampling.
and environmental practices, and determine the applicability
of regulatory limitations prior to use.
6. Method of Analysis
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
6.1 The composition of the bars or samples shall be deter-
ization established in the Decision on Principles for the
mined by any destructive or nondestructive method agreed
Development of International Standards, Guides and Recom-
upon between the manufacturer and the purchaser. Unless
mendations issued by the World Trade Organization Technical
otherwise specifically agreed, chemical methods will be used
Barriers to Trade (TBT) Committee.
for analysis. The chemical composition of the materials set
forth in this specification shall be determined, in case of
2. Referenced Documents disagreement, in accordance with Test Method E378. The
selection of methods for the determination of elements not
2.1 ASTM Standards:
covered by that test method shall be a matter of agreement
E29 Practice for Using Significant Digits in Test Data to
between the manufacturer and the purchaser.
Determine Conformance with Specifications
7. Sampling
7.1 The value of this material is such that special attention
This specification is under the jurisdiction of ASTM Committee B02 on
must be paid to sampling procedures. If the purchaser and the
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.05 on Precious Metals and Electrical Contact Materials.
manufacturer agree that samples most representative of the
Current edition approved Nov. 1, 2021. Published December 2021. Originally
assay value of a melt are required, the samples should be taken
approved in 1964. Last previous edition approved in 2017 as B413 – 97a (2017).
from the silver melt as it is ready for pouring into molds. The
DOI: 10.1520/B0413-97AR21.
samples should consist of shot or cast pins.
Other forms of unfabricated silver of commerce are not to be excluded under
this specification.
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
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
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B413 − 97a (2021)
TABLE 1 Chemical Requirements
shall be marked with the minimum fineness together with the
melt number, bar number, and weight to the nearest 0.1 oz troy.
NOTE 1—The following applies to all specified limits in this table: For
purposes of determining conformance with this specification, an observed
9. Claims
value obtained from analysis shall be rounded off “to the nearest unit” in
the last right-hand place of figures used in expressing the limiting value,
9.1 Claims to be considered shall be made to the manufac-
in accordance with the rounding-off method of Practice E29.
turer in writing within 30 days of receipt of the material at the
Composition, %
purchaser’s plant, and the results of the tests made by the
Grade Grade Grade
A,B
purchaser shall accompany such claims. The manufacturer
Element 99.90 99.95 99.99
(UNS (UNS (UNS shall be given 1 week from the date of receipt of the complaint
P07020) P07015) P07010)
to investigate his records, and shall then agree either to satisfy
Silver, min 99.90 99.95 99.99
the claim or to submit sa
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