ASTM A922-05

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A922 – 05
Standard Specification for
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Silicon Metal
This standard is issued under the fixed designation A922; 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* 4. Chemical Composition
1.1 This specification covers several grades of silicon metal. 4.1 The grades shall conform to the requirements as to the
1.2 The values stated in inch-pound units are to be regarded chemical composition specified in Table 1.
as the standard. The SI equivalents of inch-pound units given 4.2 The manufacturer shall furnish an analysis of each
may be approximate. shipment showing the percentage of each element specified.
4.3 Upon request of the purchaser, the manufacturer shall
2. Referenced Documents
furnish an analysis of any trace elements on a schedule
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2.1 ASTM Standards: mutually agreed upon between the supplier and the purchaser.
A1025 Specification for Ferroalloys and Other Alloying
5. Size
Materials, General Requirements
E11 Specification forWovenWireTest Sieve Cloth andTest 5.1 The various grades are available in sizes listed in Table
Sieves 2.
E50 Practices for Apparatus, Reagents, and Safety Consid- 5.2 The sizes listed in Table 2 are typical as shipped from
erations for Chemical Analysis of Metals, Ores, and the manufacturer’s plant. The various grades can exhibit
Related Materials different degrees of friability; therefore some attrition may be
E60 Practice for Analysis of Metals, Ores, and Related expected in transit, storage, and handling.Aquantitative test is
Materials by Molecular Absorption Spectrometry not available for rating relative friability of silicon metal. A
E360 Test Methods for Chemical Analysis of Silicon and code system has been developed, therefore, for this purpose,
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Ferrosilicon and a number rating for each product type is shown in Table 3.
Definitions applicable to these code numbers are given in
3. General Conditions for Delivery
Specification A1025.
3.1 Materialsfurnishedtothisspecificationshallconformto
6. ChemicalAnalysis
the requirements of SpecificationA1025, including any supple-
mentary requirements that are indicated in the purchase order. 6.1 The chemical analysis of the material shall be made in
Failure to comply with the general requirements of Specifica- accordance with the procedure for silicon metal as described in
tionA1025 constitutes nonconformance with this specification. Test Methods E360 or alternative methods that will yield
In case of conflict between the requirements of this specifica- equivalent results.
tion and Specification A1025, this specification shall prevail. 6.2 If alternative methods of analysis are used, in case of
discrepancy, Test Methods E360 shall be used for referee.
6.3 Where a method is not given in Test Methods E360 for
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
the analysis for a particular element, the analysis shall be made
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
in accordance with a procedure agreed upon between the
A01.18 on Castings.
Current edition approved May 1, 2005. Published May 2005. Originally
manufacturer and the purchaser.
approved in 1993. Last previous edition approved in 2004 as A922 - 93 (2004).
DOI: 10.1520/A0922-05. NOTE 1—For further information, see Practices E50 and E60.
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For referenced AST
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