ASTM A801-21

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 1.5 T (15 kG) or high saturation flux density. 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 SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to customary (cgs-emu and inch-pound) units which are provided for information only and are not considered standard.  
1.3.1 There are selected values presented in two units, both of which are in acceptable SI units. These are differentiated by the word “, or,” as in “g/cm3, or, (kg/m3).”  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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: 31-Jan-2021
• ICS: 77.080.10 - Irons
• Technical Committee: A06 - Magnetic Properties
• Drafting Committee: A06.02 - Material Specifications

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:A801 −21
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 mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This specification covers two wrought iron-cobalt alloy
types for use in magnetic components requiring high perme-
2. Referenced Documents
ability at and above 1.5 T (15 kG) or high saturation flux
2
2.1 ASTM Standards:
density. The specific alloy types covered are:
A34/A34M Practice for Sampling and Procurement Testing
Alloy Type UNS Nominal Composition
of Magnetic Materials
1 R30005 49 % Co, 49 % Fe, 2 % V
A340 Terminology of Symbols and Definitions Relating to
2 K92650 27 % Co, 0.50 % Cr, balance Fe
Magnetic Testing
1.1.1 This specification also covers material supplied by a
A341/A341M Test Method for Direct Current Magnetic
producer in the form and physical condition suitable for
Properties of Soft Magnetic Materials Using D-C Per-
fabrication into parts that will later be given final heat
meameters and the Point by Point (Ballistic)Test Methods
treatment to achieve the desired magnetic characteristics and,
A596/A596M Test Method for Direct-Current Magnetic
where required, mechanical properties. It covers material
PropertiesofMaterialsUsingthePointbyPoint(Ballistic)
supplied in form of forging billets, hot-rolled products (that is,
Method and Ring Specimens
bar, plate, and strip), cold-finished bars, and cold-rolled strip.
A773/A773M Test Method for Direct Current Magnetic
Properties of Low Coercivity Magnetic Materials Using
1.2 This specification does not cover parts produced by
Hysteresigraphs
casting or by powder metallurgical techniques.
E1019 Test Methods for Determination of Carbon, Sulfur,
1.3 The values stated in SI units are to be regarded as
Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt
standard. The values given in parentheses are mathematical
Alloys by Various Combustion and Inert Gas Fusion
conversions to customary (cgs-emu and inch-pound) units
Techniques
whichareprovidedforinformationonlyandarenotconsidered
standard.
3. Terminology
1.3.1 There are selected values presented in two units, both
3.1 The terms and symbols used in this specification are
of which are in acceptable SI units. These are differentiated by
defined in Terminology A340.
3 3
the word “, or,” as in “g/cm , or, (kg/m ).”
4. Ordering Information
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.1 Purchase orders for material under this specification
responsibility of the user of this standard to establish appro-
shall include the following information:
priate safety, health, and environmental practices and deter-
4.1.1 Reference to this specification and year of issue/
mine the applicability of regulatory limitations prior to use.
revision.
1.5 This international standard was developed in accor-
4.1.2 Alloy type.
dance with internationally recognized principles on standard-
4.1.3 Form and conditions (see Section 6).
ization established in the Decision on Principles for the
4.1.4 Dimensions and tolerances, (tolerances other than
Development of International Standards, Guides and Recom-
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).
1
This specification is under the jurisdiction of ASTM Committee A06 on
Magnetic Properties and is the direct responsibility of Subcommittee A06.02 on
2
Material Specifications. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Feb. 1, 2021. Published February 2021. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1999. Last previous edition approved in 2014 as A801 – 14. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/A0801-21. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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A801−21
TABLE 1 Chemical Requirements (Weight Percent)
7.2 Test Specimen—Whenever possible, test specimen size
Alloy 1 Alloy 2 and shape shall conform to Practice A34/A34M. Shapes such
UNS R300
...

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: A801 − 14 A801 − 21
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 for use in magnetic components requiring high permeability at
and above 15 kG (1.5 T)1.5 T (15 kG) or high magnetic saturation. saturation flux density. 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) SI units are to be regarded as standard. The values given in
parentheses are mathematical conversions to SI units, customary (cgs-emu and inch-pound) units which are provided for
information only and are not considered standard.
1.3.1 There are selected values presented in two units, both of which are in acceptable SI units. These are differentiated by the
3 3
word “, or,” as in “g/cm , or, (kg/m ).”
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 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.
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 May 1, 2014Feb. 1, 2021. Published May 2014February 2021. Originally approved in 1999. Last previous edition approved in 20092014 as
A801A801 – 14.–09. DOI: 10.1520/A0801-14.10.1520/A0801-21.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
A801 − 21
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 Soft Magnetic Materials Using D-C Permeameters and the
Point by Point (Ballistic) Test Methods
A596/A596M Test Method for Direct-Current Magnetic Properties of Materials Using the Point by Point (Ballistic) Method and
Ring Specimens
A773/A773M Test Method for Direct Current Magnetic Properties of Low Coercivity Magnetic Materials Using Hysteresig-
raphs
E1019 Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by
Various Combustion and Inert Gas Fusion Techniques
3. Terminology
3.1 The terms and symbols used in this specification are defined in Terminology A340.
4. Ordering Information
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,issue/revision.
4.1.2 Alloy type,type.
4.1.3 Form and conditions (see Section 6),).
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),user).
4.1.5 Quantity (weight or number of pieces),pieces).
4.1.6 Magnetic property requirements if other than shown in this specification (see Section 7),).
4.1.7 Certificatio
...