ASTM B413-97a(2003)
(Specification)Standard Specification for Refined Silver
Standard Specification for Refined Silver
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 the 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 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.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B 413 – 97a (Reapproved 2003)
Standard Specification for
Refined Silver
This standard is issued under the fixed designation B 413; 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
1.1 This specification covers refined silver cast bar form in NOTE 1—The following applies to all specified limits in this table: For
purposes of determining conformance with this specification, an observed
three grades as follows:
value obtained from analysis shall be rounded off “to the nearest unit” in
1.1.1 Grade 99.90 (UNS P07020)—Silver having a mini-
the last right-hand place of figures used in expressing the limiting value,
mum fineness of 999.0 commonly referred to as “commercial
in accordance with the rounding-off method of Practice E 29.
bar” or “bullion.”
Composition, %
1.1.2 Grade 99.95 (UNS P07015)—Silver having a mini-
Grade Grade Grade
mum fineness of 999.5.
A,B
Element
99.90 99.95 99.99
1.1.3 Grade 99.99 (UNS P07010)—A premium grade hav-
(UNS (UNS (UNS
ing a minimum fineness of 999.9. P07020) P07015) P07010)
1.2 The values stated in inch-pound units are to be regarded
Silver, min 99.90 99.95 99.99
Silver and copper, min 99.95 . .
as the standard.
Bismuth, max 0.001 0.001 0.0005
1.3 This standard does not purport to address all of the
Copper, max 0.08 0.04 0.010
safety concerns, if any, associated with its use. It is the
Iron, max 0.002 0.002 0.001
Lead, max 0.025 0.015 0.001
responsibility of the user of this standard to become familiar
Palladium, max . . 0.001
with all hazards, including those identified in the appropriate
Selenium, max . . 0.0005
Material Safety Data Sheet for this product/material as pro- Tellurium, max . . 0.0005
A
vided by the manufacturer, to establish appropriate safety and
Impuritiesotherthanthoselistedabovemaybeincludedbyspecialagreement
between purchaser and manufacturer.
health practices, and determine the applicability of regulatory
B
In this specification, it is to be noted that while oxygen is neither specified nor
limitations prior to use.
determined analytically, it is known to be present in the refined silver. When
calculating the purity of refined silver by difference, oxygen will be considered as
2. Referenced Documents
silver.
2.1 ASTM Standards:
E 29 Practice for Using Significant Digits in Test Data to
3.3 The manufacturer shall use care to have each shipment
Determine Conformance with Specifications
of as uniform quality as possible.
E 378 Test Method for SpectrographicAnalysis of Silver by
the Powder Technique
4. Chemical Composition
3. Materials and Manufacture
4.1 The refined silver shall conform to the chemical com-
position prescribed in Table 1.
3.1 The silver shall be produced by any process that yields
a product capable of meeting the requirements of this specifi-
5. Lots
cation.
5.1 A single melt shall constitute a lot for sampling.
3.2 The bars shall be of a quality generally acceptable to the
trade.
6. Method of Analysis
6.1 The composition of the bars or samples shall be deter-
mined by any destructive or nondestructive method agreed
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
upon between the manufacturer and the purchaser. Unless
B02.05 on Precious Metals and Electrical Contact Materials.
otherwise specifically agreed, chemical methods will be used
Current edition approved Nov. 1, 2003. Published December 2003. Originally
for analysis. The chemical composition of the materials set
approved in 1964. Last previous edition approved in 1997 as B 413 – 97a.
forth in this specification shall be determined, in case of
Other forms of unfabricated silver of commerce are not to be excluded under
this specification.
disagreement, in accordance with Test Method E 378. The
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
selection of methods for the determination of elements not
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
covered by that test method shall be a matter of agreement
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. between the manufacturer and the purchaser.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 413 – 97a (2003)
7. Sampling shall be given 1 week from the date of receipt of the complaint
to investigate his records, and shall then agree either to satisfy
7.1 The value of this material is such that special attention
the claim or to submit samples to an umpire. No claim shall be
must be paid to sampling procedures. If the purchaser and the
considered unless a portion of the original silver bars can be
manufacturer agree that samples most representative of the
shown to the representative of the manufacturer
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.