ASTM A100-04
(Specification)Standard Specification for Ferrosilicon
Standard Specification for Ferrosilicon
SCOPE
1.1 This specification covers grades of ferrosilicon for steelmaking and foundry uses.
1.2 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units (SI units) given in parentheses may be approximate.
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Designation: A 100 – 04
Standard Specification for
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Ferrosilicon
This standard is issued under the fixed designation A 100; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* 4. Chemical Composition
1.1 This specification covers grades of ferrosilicon for 4.1 The various grades shall conform to the requirements as
steelmaking and foundry uses. to chemical composition prescribed in Table 1.
1.2 The values stated in inch-pound units are to be regarded 4.2 The manufacturer shall furnish an analysis of each
as the standard. The metric equivalents of inch-pound units (SI shipment showing the silicon content and when required, such
units) given in parentheses may be approximate. of the other elements specified in Table 1.
2. Referenced Documents 5. Size
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2.1 ASTM Standards: 5.1 The various grades are available in sizes as listed in
A 1025 Specification for Ferroalloys, General Require- Table 2.
ments 5.2 The sizes listed in Table 2 are typical as shipped from
E 11 Specification for Wire Cloth and Sieves for Testing the manufacturer’s plant. These alloys exhibit varying degrees
Purposes of friability; therefore, some attrition may be expected in
E 29 Practice for Using Significant Digits in Test Data to transit, storage, and handling. A quantitative test is not avail-
Determine Conformance with Specifications able for rating relative friability of ferroalloys. A code system
E 32 Practices for Sampling Ferroalloys and SteelAdditives has been developed, therefore, for this purpose, and a number
for Determination of Chemical Composition rating for each product type is shown in the last column of
E 360 Test Methods for Chemical Analysis of Silicon and Table 2. Definitions applicable to these code numbers are given
Ferrosilicon in Specification A 1025.
3. General Conditions of Delivery 6. ChemicalAnalysis
3.1 Materials furnished to this specification shall conform to 6.1 Unless otherwise agreed upon, the chemical analysis of
the requirements of Specification A 1025, including any the material shall be made in accordance with Test Methods
supplementary requirements that are indicated in the purchase E 360.
order. Failure to comply with the general requirements of 6.2 If alternative methods of analysis are used, Methods
Specification A 1025 constitutes nonconformance with this E 360 shall be used for referee.
specification. In case of conflict between the requirements of 6.3 Where a method is not given in Methods E 360 for the
this specification and Specification A 1025, this specification analysis for a particular element, the analysis shall be made in
shall prevail. accordance with a procedure agreed upon between the manu-
facturer and the purchaser.
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This specification is under the jurisdiction of ASTM Committee A01 on Steel, 7. Keywords
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
7.1 ferroalloy; ferrosilicon
A01.18 on Castings.
Current edition approved May 1, 2004. Published May 2004. Originally
approved in 1925. Last previous edition approved in 1993 as A 100 – 93 (2000).
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.
*ASummary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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A 100–04
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TABLE 1 Chemical Requirements
Element Grade
C CA CB C1 C2 D DA E EA E1 E1A F F1 F1A G GA G1 G1A
A,B
Composition, %
Silicon 74.0– 74.0– 74.0– 74.0– 74.0– 65.0– 65.0– 47.0– 47.0– 47.0– 47.0– 20.0– 20.0– 20.0– 14.0– 14.0– 14.0– 14.0–
79.0 79.0 79.0 79.0 79.0 67.0 67.0 51.0 51.0 51.0 51.0 24.0 24.0 24.0 17.0 17.0 17.0 17.0
Carbon 0.10 0.10 0.10 0.10 0.10 0.10 0.10 .010 .010 0.10 0.10 0.50 0.50 0.50 0.70 0.70 0.70 0.70
Sulfur 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025
Phosphorous 0.035 0.035 0.035 0.035 0.035 0.035 0.035 0.040 0.040 0.040 0.040 0.120 0.120 0.120 0.120 0.120 0.120 0.120
Aluminum 1.50 0.50 0.10 1.00– 1.00– 1.25 0.10 1.25 0.40 1.25 1.25 1.00 1.00 1.00 0.75 0.75 0.75 0.75
1.50 1.50
Manganese 0.40 0.40 0.40 0.40 0.40 0.50 0.50 0.75 0.75 0.75 0.75 1.00 1.00 1.00 1.25 — 1.25 —
Calcium ——— 0.50 0.50 —————————————
Boron ————————— 0.04– 0.04– — 0.04– 0.04– — — 0.04– 0.04–
0.10 0.10 0.10 0.10 0.10 0.10
A
A single value indicates a maximum.
B
When shippe
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