ASTM A922-05(2020)
(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.
1.3 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.
General Information
- Status
- Published
- Publication Date
- 29-Feb-2020
- Technical Committee
- A01 - Steel, Stainless Steel and Related Alloys
- Drafting Committee
- A01.18 - Castings
Relations
- Effective Date
- 01-Mar-2020
- Effective Date
- 01-Mar-2020
- Effective Date
- 01-Sep-2017
- Effective Date
- 01-Aug-2016
- Effective Date
- 01-Nov-2015
- Effective Date
- 01-Oct-2013
- Effective Date
- 15-Oct-2011
- Effective Date
- 01-Oct-2010
- Effective Date
- 01-May-2009
- Effective Date
- 01-May-2005
- Effective Date
- 01-May-2004
- Effective Date
- 01-May-2004
- Effective Date
- 10-May-2001
- Effective Date
- 10-May-2001
- Effective Date
- 01-Jan-2001
Overview
ASTM A922-05(2020) is the internationally recognized standard specification for silicon metal, published and maintained by ASTM International. This standard outlines the requirements for several grades and sizes of silicon metal, a critical raw material used across multiple industrial applications. ASTM A922 covers chemical composition, size tolerances, sampling, and testing procedures to ensure consistent material quality in global markets.
The specification supports both inch-pound and SI unit measurements, promoting universal applicability and compliance with World Trade Organization Technical Barriers to Trade (TBT) guidelines. By providing clear criteria for chemical analysis and physical properties, ASTM A922 ensures that silicon metal products meet stringent quality benchmarks, facilitating trade and efficient supply chains.
Key Topics
Grades of Silicon Metal: Defines multiple grades based on silicon content and allowable impurities, supporting selection for specific uses.
- Grade A: Silicon >98.00%
- Grade B: Silicon 89.00 - 97.99%
- Grade C: Silicon 80.00 - 88.99%
- Iron content capped at 4.00% maximum for all grades
Chemical Composition: Specifies chemical analysis requirements. Manufacturers must provide detailed compositions for each shipment and may supply trace element data upon purchaser request.
Size and Tolerances: Details standard sizes and sieving tolerances for silicon metal, as well as friability ratings which assist in handling and process optimization.
Chemical Analysis Methods: Mandates analysis via ASTM E360 or alternative validated methods, ensuring reliable and accurate determination of chemical constituents.
Compliance and Documentation: References supplemental requirements from ASTM A1025/A1025M for general delivery conditions and broader ferroalloy standards.
Applications
Silicon metal produced in conformity with ASTM A922-05(2020) is widely used due to its purity, consistency, and traceable quality. Key applications include:
- Aluminum Alloys: Enhances mechanical properties and castability in the automotive, aerospace, and construction industries.
- Chemical Industry: Serves as a primary feedstock for silicones, fumed silica, and other silicon-based compounds.
- Electronics and Photovoltaics: Utilized in the production of high-purity silicon wafers for semiconductors and solar cells.
- Metallurgical Processes: Functions as a deoxidizer and alloying agent in steel and iron manufacturing.
By adhering to ASTM A922, suppliers and manufacturers can meet the rigorous demands of advanced technology sectors and ensure reliable performance in end-use applications.
Related Standards
Organizations referencing or working with ASTM A922-05(2020) may benefit from familiarity with related ASTM standards:
- ASTM A1025/A1025M: General requirements for ferroalloys and other alloying materials, governing delivery and quality.
- ASTM E11: Specification for woven wire test sieve cloth and test sieves, essential for particle size analysis.
- ASTM E50: Practices covering apparatus, reagents, and safety for chemical analysis of metals and ores.
- ASTM E60: Analytical practices using spectrophotometry for metals and related materials.
- ASTM E360 (withdrawn): Test methods for chemical analysis of silicon and ferrosilicon (referenced in the standard for legacy methods).
Understanding and applying ASTM A922-05(2020) enables organizations to optimize their materials procurement, assure consistent process outcomes, and maintain compliance with international trade and industry regulations in the silicon metal market.
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Frequently Asked Questions
ASTM A922-05(2020) is a technical specification published by ASTM International. Its full title is "Standard Specification for Silicon Metal". This standard covers: 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. 1.3 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.
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. 1.3 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.
ASTM A922-05(2020) is classified under the following ICS (International Classification for Standards) categories: 77.120.99 - Other non-ferrous metals and their alloys. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM A922-05(2020) has the following relationships with other standards: It is inter standard links to ASTM A922-05(2015), ASTM A1025/A1025M-10(2020), ASTM E50-17, ASTM E50-11(2016), ASTM A1025/A1025M-10(2015), ASTM E11-13, ASTM E50-11, ASTM A1025/A1025M-10, ASTM E11-09e1, ASTM E50-00(2005), ASTM E11-04, ASTM E60-98(2004), ASTM E11-01, ASTM E11-95, ASTM E360-96(2001). Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM A922-05(2020) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
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.
Designation:A922 −05 (Reapproved 2020)
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 purchase order. Failure to comply with the general require-
ments of Specification A1025/A1025M constitutes nonconfor-
1.1 This specification covers several grades of silicon metal.
mance with this specification. In case of conflict between the
1.2 The values stated in inch-pound units are to be regarded
requirements of this specification and Specification A1025/
as standard. The values given in parentheses are mathematical
A1025M, this specification shall prevail.
conversions to SI units that are provided for information only
and are not considered standard. The SI equivalents of inch-
4. Chemical Composition
pound units given may be approximate.
4.1 The grades shall conform to the requirements as to the
1.3 This international standard was developed in accor-
chemical composition specified in Table 1.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 4.2 The manufacturer shall furnish an analysis of each
Development of International Standards, Guides and Recom- shipment showing the percentage of each element specified.
mendations issued by the World Trade Organization Technical
4.3 Upon request of the purchaser, the manufacturer shall
Barriers to Trade (TBT) Committee.
furnish an analysis of any trace elements on a schedule
mutually agreed upon between the supplier and the purchaser.
2. Referenced Documents
2.1 ASTM Standards:
5. Size
A1025/A1025M Specification for Ferroalloys and Other Al-
5.1 The various grades are available in sizes listed in Table
loying Materials, General Requirements
2.
E11 Specification for Woven Wire Test Sieve Cloth and Test
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
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
Specification A1025/A1025M.
3. General Conditions for Delivery
3.1 Materialsfurnishedtothisspecificationshallconformto
6. Chemical Analysis
the requirements of Specification A1025/A1025M, including
6.1 The chemical analysis of the material shall be made in
any supplementary requirements that are indicated in the
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 March 1, 2020. Published March 2020. Originally
discrepancy, Test M
...
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