ASTM A922-05(2015)
(Specification)Standard Specification for Silicon Metal
Standard Specification for Silicon Metal
ABSTRACT
This specification covers different sizes of several grades of silicon metal. The metal shall undergo chemical analysis and shall conform to specified chemical composition requirements.
SCOPE
1.1 This specification covers several grades of silicon metal.
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. The SI equivalents of inch-pound units given may be approximate.
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Designation:A922 −05 (Reapproved 2015)
Standard Specification for
1
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
chemical composition specified in Table 1.
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
4.2 The manufacturer shall furnish an analysis of each
conversions to SI units that are provided for information only
shipment showing the percentage of each element specified.
and are not considered standard. The SI equivalents of inch-
4.3 Upon request of the purchaser, the manufacturer shall
pound units given may be approximate.
furnish an analysis of any trace elements on a schedule
2. Referenced Documents mutually agreed upon between the supplier and the purchaser.
2
2.1 ASTM Standards:
5. Size
A1025 Specification for Ferroalloys and Other Alloying
Materials, General Requirements
5.1 The various grades are available in sizes listed in Table
E11 Specification for Woven Wire Test Sieve Cloth and Test
2.
Sieves
5.2 The sizes listed in Table 2 are typical as shipped from
E50 Practices for Apparatus, Reagents, and Safety Consid-
the manufacturer’s plant. The various grades can exhibit
erations for Chemical Analysis of Metals, Ores, and
different degrees of friability; therefore some attrition may be
Related Materials
expected in transit, storage, and handling.Aquantitative test is
E60 Practice for Analysis of Metals, Ores, and Related
not available for rating relative friability of silicon metal. A
Materials by Spectrophotometry
code system has been developed, therefore, for this purpose,
E360 Test Methods for Chemical Analysis of Silicon and
3 and a number rating for each product type is shown in Table 3.
Ferrosilicon (Withdrawn 2006)
Definitions applicable to these code numbers are given in
3. General Conditions for Delivery Specification A1025.
3.1 Materialsfurnishedtothisspecificationshallconformto
6. Chemical Analysis
therequirementsofSpecificationA1025,includinganysupple-
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
tion A1025 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.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
6.3 Where a method is not given in Test Methods E360 for
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.18 on Castings.
the analysis for a particular element, the analysis shall be made
Current edition approved Nov. 1, 2015. Published November 2015. Originally
in accordance with a procedure agreed upon between the
approved in 1993. Last previous edition approve
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A922 − 05 (Reapproved 2010) A922 − 05 (Reapproved 2015)
Standard Specification for
1
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
1.1 This specification covers several grades of silicon metal.
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. The SI equivalents of inch-pound
units given may be approximate.
2. Referenced Documents
2
2.1 ASTM Standards:
A1025 Specification for Ferroalloys and Other Alloying Materials, General Requirements
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
E50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
E60 Practice for Analysis of Metals, Ores, and Related Materials by Spectrophotometry
3
E360 Test Methods for Chemical Analysis of Silicon and Ferrosilicon (Withdrawn 2006)
3. General Conditions for Delivery
3.1 Materials furnished to this specification shall conform to the requirements of Specification A1025, including any
supplementary requirements that are indicated in the purchase order. Failure to comply with the general requirements of
Specification A1025 constitutes nonconformance with this specification. In case of conflict between the requirements of this
specification and Specification A1025, this specification shall prevail.
4. Chemical Composition
4.1 The grades shall conform to the requirements as to the chemical composition specified in Table 1.
4.2 The manufacturer shall furnish an analysis of each shipment showing the percentage of each element specified.
4.3 Upon request of the purchaser, the manufacturer shall furnish an analysis of any trace elements on a schedule mutually
agreed upon between the supplier and the purchaser.
5. Size
5.1 The various grades are available in sizes listed in Table 2.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.18
on Castings.
Current edition approved April 1, 2010Nov. 1, 2015. Published May 2010November 2015. Originally approved in 1993. Last previous edition approved in 20052010 as
A922A922 – 05 (2010).-05. DOI: 10.1520/A0922-05R10.10.1520/A0922-05R15.
2
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 ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
TABLE 1 Chemical Requirements
Element Composition %
Grade A Grade B Grade C
Silicon >98.00 89.00 to 97.99 80.00 to 88.99
Iron . 4.00 max 4.00 max
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A922 − 05 (2015)
A
TABLE 2 Standard Sizes and Tolerances
Standard Sizes Tolerances
8 by 2 in. (200 60 lb. (27.2 kg) lump, max 10 % max, passing 2 in.
by 50 mm) (50 mm) sieve
6 in. (150 mm) 10 % max, retained on 6 in. 12 % max, passing 8 M
by down (150 mm) sieve sieve
4 in. (100 mm) 10 % max, retained on 4 in. 12 % max, passing 8 M
by down (100 mm) sieve sieve
1 1
4 by ⁄2 in. (100 10 % max, retained on 4 in. 10 % max, passing ⁄2 in.
by 12.5 mm) (100 mm) sieve (12.5 mm) sieve
4 by 1 in. (100 10 % max, retained on 4 in. 10 % max, passing 1 in.
by 25 mm) (100 mm) sieve (25 mm) sieve
1 1
3 by ⁄2 in. (75 12 % max, retained on 3 in. 15 % max, passing ⁄2 in.
by 12.5 mm) (75 mm) sieve (12.5 mm) sieve
3 by 1 in. (75 by 12 % max, retained on 3 in. 15 % max, passing 1 in.
25 mm) (75 mm) sieve (25 mm) sieve
1 1
2 by ⁄2 in. (50 12 % max, retained on 3 in. 15 % max, passing ⁄2 in.
by 12.5 mm) (75 mm) sieve (12.5 mm) sieve
1 in. (25 mm) by 10 % max, retained on 1 in. 10 % max, passing No. 8.
No. 8 (25 mm) sieve
1 in. (25 mm) by 12 % max, retained on 1 in. 20 % max, passing No. 8.
down (25 mm) sieve
No. 8 by down 10 % max, retained on No. .
8 sieve
No. 20 by down 10 % max, retained on No. .
20 sieve
A
Toleranc
...
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