ASTM A922-05(2010)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:A922 −05(Reapproved 2010)
Standard Specification for
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 In case of conflict between the requirements of this specifica-
tion and Specification A1025, this specification shall prevail.
1.1 This specification covers several grades of silicon metal.
1.2 The values stated in inch-pound units are to be regarded
4. Chemical Composition
as standard. The values given in parentheses are mathematical
4.1 The grades shall conform to the requirements as to the
conversions to SI units that are provided for information only
chemical composition specified in Table 1.
and are not considered standard. The SI equivalents of inch-
pound units given may be approximate.
4.2 The manufacturer shall furnish an analysis of each
shipment showing the percentage of each element specified.
2. Referenced Documents
4.3 Upon request of the purchaser, the manufacturer shall
2.1 ASTM Standards:
furnish an analysis of any trace elements on a schedule
A1025 Specification for Ferroalloys and Other Alloying
mutually agreed upon between the supplier and the purchaser.
Materials, General Requirements
E11 Specification for Woven Wire Test Sieve Cloth and Test
5. Size
Sieves
5.1 The various grades are available in sizes listed in Table
E50 Practices for Apparatus, Reagents, and Safety Consid-
2.
erations for Chemical Analysis of Metals, Ores, and
Related Materials
5.2 The sizes listed in Table 2 are typical as shipped from
E60 Practice for Analysis of Metals, Ores, and Related the manufacturer’s plant. The various grades can exhibit
Materials by Spectrophotometry
different degrees of friability; therefore some attrition may be
E360 Test Methods for Chemical Analysis of Silicon and expected in transit, storage, and handling.Aquantitative test is
Ferrosilicon (Withdrawn 2003)
not available for rating relative friability of silicon metal. A
code system has been developed, therefore, for this purpose,
3. General Conditions for Delivery
and a number rating for each product type is shown in Table 3.
Definitions applicable to these code numbers are given in
3.1 Materialsfurnishedtothisspecificationshallconformto
Specification A1025.
therequirementsofSpecificationA1025,includinganysupple-
mentary requirements that are indicated in the purchase order.
6. Chemical Analysis
Failure to comply with the general requirements of Specifica-
tion A1025 constitutes nonconformance with this specification.
6.1 The chemical analysis of the material shall be made in
accordance with the procedure for silicon metal as described in
Test Methods E360 or alternative methods that will yield
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
equivalent results.
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.18 on Castings.
6.2 If alternative methods of analysis are used, in case of
Current edition approved April 1, 2010. Published May 2010. Originally
discrepancy, Test Methods E360 shall be used for referee.
approved in 1993. Last previous edition approved in 2005 as A922-05. DOI:
10.1520/A0922-05R10.
6.3 Where a method is not given in Test Methods E360 for
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
the
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