ASTM A801-09
(Specification)Standard Specification for Wrought Iron-Cobalt High Magnetic Saturation Alloys (UNS R30005 and K92650)
Standard Specification for Wrought Iron-Cobalt High Magnetic Saturation Alloys (UNS R30005 and K92650)
ABSTRACT
This specification covers wrought iron-cobalt high magnetic saturation alloys, UNS R30005 (49 % Co, 49 % Fe, 2 % V) and UNS K92650 (27 % Co, balance Fe), for use in magnetic components. The specification covers alloy supplied in form of forging billets, hot-rolled bar, hot rolled plate, cold-finished bar, and cold rolled strip. It does not cover alloy produced either by casting or by powder metallurgical techniques. The material shall conform to the chemical requirements prescribed in this specification. Magnetic property requirements and dimensional tolerances are listed. Appendices giving useful information on the heat treatment of these alloys and typical physical properties are included.
SCOPE
1.1 This specification covers two wrought iron-cobalt alloy types for use in magnetic components requiring high permeability at and above 15 kG (1.5 T) or high magnetic saturation. The specific alloy types covered are:
Alloy TypeUNSNominal Composition 1R3000549 % Co, 49 % Fe, 2 % V 2K9265027 % Co, 0.50 % Cr, balance Fe
1.1.1 This specification also covers material supplied by a producer in the form and physical condition suitable for fabrication into parts that will later be given final heat treatment to achieve the desired magnetic characteristics and, where required, mechanical properties. It covers material supplied in form of forging billets, hot-rolled products (that is, bar, plate, and strip), cold-finished bars, and cold-rolled strip.
1.2 This specification does not cover parts produced by casting or by powder metallurgical techniques.
1.3 The values stated in customary (cgs-emu and inch-pound) units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units, which are provided for information only and are not considered standard.
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Designation:A801 −09
StandardSpecification for
Wrought Iron-Cobalt High Magnetic Saturation Alloys (UNS
1
R30005 and K92650)
This standard is issued under the fixed designation A801; 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 Ballistic Test Methods
A596/A596M Test Method for Direct-Current Magnetic
1.1 This specification covers two wrought iron-cobalt alloy
Properties of Materials Using the Ballistic Method and
types for use in magnetic components requiring high perme-
Ring Specimens
ability at and above 15 kG (1.5 T) or high magnetic saturation.
A773/A773M Test Method for dc Magnetic Properties of
The specific alloy types covered are:
Materials Using Ring and Permeameter Procedures with
Alloy Type UNS Nominal Composition
dc Electronic Hysteresigraphs
1 R30005 49 % Co, 49 % Fe, 2 % V E1019 Test Methods for Determination of Carbon, Sulfur,
2 K92650 27 % Co, 0.50 % Cr, balance Fe
Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt
1.1.1 This specification also covers material supplied by a Alloys by Various Combustion and Fusion Techniques
producer in the form and physical condition suitable for
fabrication into parts that will later be given final heat
3. Terminology
treatment to achieve the desired magnetic characteristics and,
3.1 The terms and symbols used in this specification are
where required, mechanical properties. It covers material
defined in Terminology A340.
supplied in form of forging billets, hot-rolled products (that is,
bar, plate, and strip), cold-finished bars, and cold-rolled strip.
4. Ordering Information
1.2 This specification does not cover parts produced by
4.1 Purchase orders for material under this specification
casting or by powder metallurgical techniques.
shall include the following information:
1.3 The values stated in customary (cgs-emu and inch-
4.1.1 Reference to this specification and year of issue/
pound) units are to be regarded as standard. The values given
revision,
in parentheses are mathematical conversions to SI units, which
4.1.2 Alloy type,
are provided for information only and are not considered
4.1.3 Form and conditions (see Section 6),
standard.
4.1.4 Dimensions and tolerances, (tolerances other than
those in Section 9 must be stated as mutually agreed upon
2. Referenced Documents
between the producer and the user),
2
2.1 ASTM Standards:
4.1.5 Quantity (weight or number of pieces),
A34/A34M Practice for Sampling and Procurement Testing
4.1.6 Magneticpropertyrequirementsifotherthanshownin
of Magnetic Materials
this specification (see Section 7),
A340 Terminology of Symbols and Definitions Relating to
4.1.7 Certification of analysis or magnetic quality
Magnetic Testing
evaluation, or both, if needed,
A341/A341M Test Method for Direct Current Magnetic
4.1.8 Marking and packaging, and
Properties of Materials Using D-C Permeameters and the
4.1.9 Exceptions to this specification or special require-
ments.
4.2 End Use—When possible, the user should specify
1
This specification is under the jurisdiction of ASTM Committee A06 on
whetherthematerialwillbemachined,blankedintoflatpieces,
Magnetic Properties and is the direct responsibility of Subcommittee A06.02 on
Material Specifications.
wound into a core, punched into laminations, or photo-etched.
Current edition approved Nov. 1, 2009. Published December 2009. Originally
approved in 1999. Last previous edition approved in 2004 as A801–04. DOI:
5. Chemical Composition
10.1520/A0801-09.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1 The material shall conform to the requirements pre-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
scribed in Table 1. Since magnetic and possibly mechanical
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. properties are of primary importance to the user, analysis
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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A801−09
TABLE 1 Chemical Requirements (Weight Percent)
7. Magnetic Property Requirements
Alloy 1 Alloy 2
7.1 General—Material supplied under terms of this specifi-
UNS R30005 UNS K92650
cation shall be tested only by use of dc test methods. AC
Carbon, max 0.025 0.025
Manganese, max 0.15 0.35
magnetic property measurements and requirements for thin
Silicon, max 0.15 0.35
strip (thickness less than 0.020 in. (0.5 mm)) are subject to
Phosphorus, max 0.015 0.015
mutual agreement between the producer and user.
Sulfur, max 0.010 0.015
Chromium, max 0.15 0.7
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:A801–04 Designation: A801 – 09
Standard Specification for
Wrought Iron-Cobalt High Magnetic Saturation Alloys (UNS
1
R30005 and K92650)
This standard is issued under the fixed designation A801; 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 two wrought iron-cobalt alloy types currently manufactured and supplied commercially for use in
magnetic components requiring high permeability at and above 15 kG (1.5T) or high magnetic saturation.The specific alloy types
covered are:
Alloy Type UNS Nominal Composition
1 R30005 49 % Co, 49 % Fe, 2 % V
2 K92650 27 % Co, 0.50 % Cr, balance Fe
1.1.1 This specification also covers material supplied by a producer in the form and physical condition suitable for fabrication
into parts that will later be given final heat treatment to achieve the desired magnetic characteristics and, where required,
mechanical properties. It covers material supplied in form of forging billets, hot-rolled products (that is, bar, plate, and strip),
cold-finished bars, and cold-rolled strip.
1.2 This specification does not cover parts produced by casting or by powder metallurgical techniques.
1.3 The values stated in customary (cgs-emu and inch-pound) units are to be regarded as standard. The values given in
parentheses are mathematical conversions to SI units, which are provided for information only and are not considered standard.
2. Referenced Documents
2
2.1 ASTM Standards:
A34/A34M Practice for Sampling and Procurement Testing of Magnetic Materials
A340 Terminology of Symbols and Definitions Relating to Magnetic Testing
A341/A341M Test Method for Direct Current Magnetic Properties of Materials Using D-C Permeameters and the BallisticTest
Methods
A596/A596M Test Method for Direct-Current Magnetic Properties of Materials Using the Ballistic Method and Ring
Specimens
A773/A773M TestMethodfordcMagneticPropertiesofMaterialsUsingRingandPermeameterProcedureswithdcElectronic
Hysteresigraphs
E1019 Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by
Various Combustion and Fusion Techniques
3. Terminology
3.1 The terms and symbols used in this specification are defined in Terminology A340.
4. Ordering Information
4.1Purchase orders for material under this specification shall include such of the following information to adequately describe
the desired product.
4.1 Purchase orders for material under this specification shall include the following information:
4.1.1 Reference to this specification and year of issue/revision,
4.1.2 Alloy type,
4.1.3 Form and conditions (see Section 6),
1
This specification is under the jurisdiction of ASTM Committee A06 on Magnetic Properties and is the direct responsibility of Subcommittee A06.02 on Material
Specifications.
Current edition approved Oct.Nov. 1, 2004.2009. Published October 2004.December 2009. Originally approved in 1999. Last previous edition approved in 19992004 as
A801/A801M–99.A801–04. DOI: 10.1520/A0801-049.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
A801 – 09
4.1.4 Dimensions and tolerances, (tolerances other than those in Section 9 must be stated as mutually agreed upon between the
producer and the user),
4.1.5 Quantity (weight or number of pieces),
4.1.6 Magnetic property requirements if other than shown in this specification (see Section 7),
4.1.7 Certification of analysis or magnetic quality evaluation, or both, if needed,
4.1.8 Marking and packaging, and
4.1.9 Exceptions to this specification or special requirements.
4.2 End Use—Whenever practicable,—When possible, the user should specify whether the material will be machined, blanked
into flat pieces, wound into a core, punched into laminations, or photo-etched.
5. Chemical Composition
5.1 The material shall conform to the requirements prescribed in Table 1. Since magnetic and possibly mechanical properties
areofprimaryimportancetotheuser,analysisvariationsa
...
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