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ASTM B561-94(2012)

(Specification)

Standard Specification for Refined  Platinum

Standard Specification for Refined  Platinum

ABSTRACT
This specification covers refined platinum as sponge, cast bar, and wrought forms in two grades as follows: Grade 99.95 and Grade 99.99. The refined platinum shall conform to the required chemical composition for platinum, rhodium, palladium, ruthenium, iridium, gold, silver, lead, tin, zinc, iron, manganese, copper, silicon, calcium, magnesium, aluminum, nickel, chromium, antimony, arsenic, bismuth, tellurium, cadmium, and molybdenum. The metal may be produced by refining process that yields a product capable of meeting the chemical requirements of this specification.
SCOPE
1.1 This specification covers refined platinum as sponge, cast bar, and wrought forms (Note 1) in two grades as follows:  
1.1.1 Grade 99.95 (UNS PO4995)—Platinum having a purity of 99.95 %, min, and  
1.1.2 Grade 99.99—Platinum having a purity of 99.99 % min. Note 1—Other forms of unfabricated platinum of commerce are not to be excluded under this specification.
Note 2—For the purposes of determining conformance with this 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 the limiting value, in accordance with the rounding off method of Practice E29.  
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.

General Information

Status
Historical
Publication Date
31-Oct-2012
ICS
77.120.99 - Other non-ferrous metals and their alloys
Technical Committee
B02 - Nonferrous Metals and Alloys
Drafting Committee
B02.05 - Precious Metals and Electrical Contact Materials and Test Methods
Current Stage
Ref Project

Relations

Replaces
ASTM B561-94(2005) - Standard Specification for Refined Platinum
Effective Date
01-Nov-2012
Referred By
ASTM E1159-15(2020)e1 - Standard Specification for Thermocouple Materials, Platinum-Rhodium Alloys, and Platinum
Effective Date
01-Nov-2012

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ASTM B561-94(2012) - Standard Specification for Refined  PlatinumASTM B561-94(2012) - Standard Specification for Refined  Platinum
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ASTM B561-94(2012) - Standard Specification for Refined  Platinum
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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:B561 −94 (Reapproved 2012)
Standard Specification for
Refined Platinum
This standard is issued under the fixed designation B561; 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 of this specification. The purchaser, upon request, shall be
informed of the refining process used.
1.1 This specification covers refined platinum as sponge,
cast bar, and wrought forms (Note 1) in two grades as follows:
3.2 The surfaces of bars and wrought forms shall exhibit
1.1.1 Grade 99.95 (UNS PO4995)—Platinum having a pu-
quality generally acceptable to the trade.
rity of 99.95 %, min, and
1.1.2 Grade 99.99—Platinum having a purity of 99.99 %
4. Chemical Composition
min.
4.1 The refined platinum shall conform to the chemical
NOTE 1—Other forms of unfabricated platinum of commerce are not to
composition prescribed in Table 1.
be excluded under this specification.
NOTE 2—For the purposes of determining conformance with this
specification, an observed value obtained from analysis shall be rounded
5. Sampling
to the nearest unit in the last right hand place of figures used in expressing
the limiting value, in accordance with the rounding off method of Practice 5.1 The value of this material is such that special attention
E29.
must be paid to sampling procedures. The purchaser and
1.2 The values stated in inch-pound units are to be regarded manufacturer shall agree upon the sampling procedures used.
as standard. The values given in parentheses are mathematical
5.2 Lot Size—Sampling lots shall consist of the following:
conversions to SI units that are provided for information only
5.2.1 Sponge—A single refining lot, and
and are not considered standard.
5.2.2 Other Forms—Asingle melt or primary consolidation.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
6. Methods of Analysis
responsibility of the user of this standard to become familiar
with all hazards including those identified in the appropriate
6.1 Pending the development of standardASTM methods of
Material Safety Data Sheet (MSDS) for this product/material
chemical or spectrographic analysis, or both, the methods to be
as provided by the manufacturer, to establish appropriate
used shall be a matter of agreement between the manufacturer
safety and health practices, and determine the applicability of
and the purchaser.
regulatory limitations prior to use.
7. Rejection and Rehearing
2. Referenced Documents
2.1 ASTM Standards: 7.1 Material that fails to conform to the requirements of this
E29 Practice for Using Significant Digits in Test Data to
specification may be rejected. Rejection should be reported to
Determine Conformance with Specifications
the producer or supplier promptly and in writing. In case of
dissatisfaction with the results of the test, the producer or
3. Materials and Manufacture
supplier may make claim for rehearing.
3.1 The metal may be produced by any refining process that
7.1.1 If the platinum satisfies the requirements of this
yields a product capable of meeting the chemical requirements
specification, it shall not be rejected for defects in the products
in which it is used.
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
7.2 Investigation of Cl
...

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9.1 Proprietary methods for manufacture of these materials vary significantly among suppliers and these methods influence such properties as arc erosion, contact resistance, and the tendency to weld in service. Since the performance of contacts in a device depends on numerous factors outside the contact itself (opening speed, closing speed, contact pressure, contact bounce, environmental variations, assembly technique and variations, etc.), this specification cannot ensure performance control in the application. As part of the qualification on initial samples, it is recommended that the user functionally test the materials electrically for all devices applicable to the material's use. This specification provides a means for the contact manufacturer and contact user to reach agreement on the details of material to be supplied for a specific use and reasonable assurance that future lots will be similar in properties and microstructure to the initial test or sample contact supplied.
SCOPE
1.1 This specification covers electrical contact components made from silver nickel by powder metallurgical procedures.  
1.2 This specification covers compositions within the silver-nickel system normally specified by users of electrical contacts.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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1.5 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.

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