ASTM A664-14
(Practice)Standard Practice for Identification of Standard Electrical Steel Grades in ASTM Specifications
Standard Practice for Identification of Standard Electrical Steel Grades in ASTM Specifications
ABSTRACT
This practice covers the procedure for designating standard grades of flat-rolled electrical steels made to specified maximum values of core loss. This practice applies to magnetically soft irons and steel such as low-carbon steels and alloys of iron with silicon, aluminum,and so forth where a core loss measurement at a stated peak value of alternating induction and a stated frequency. This practice also applies when some other property
SCOPE
1.1 This practice covers the procedure for designating (within ASTM specifications) standard grades of flat-rolled electrical steels made to specified maximum values of core loss. This practice applies to magnetically soft irons and steel (low-carbon steels and alloys of iron with silicon, aluminum, and so forth) where a core loss measurement at a stated peak value of alternating induction and a stated frequency, such as 15 kG (1.5 T) and 60 Hz, is normally used to grade the material. This practice also applies when some other property is specified (or a different induction or frequency, or both) as the limiting characteristic, provided the material also meets all the requirements of the ASTM specification.
1.2 Individual specifications that are in conformity with this practice are Specifications A677, A683, A726, A876, and A1086.
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.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:A664 −14
StandardPractice for
Identification of Standard Electrical Steel Grades in ASTM
1
Specifications
This standard is issued under the fixed designation A664; 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 A677 Specification for Nonoriented Electrical Steel Fully
Processed Types
1.1 This practice covers the procedure for designating
A683 Specification for Nonoriented Electrical Steel, Semi-
(within ASTM specifications) standard grades of flat-rolled
processed Types
electrical steels made to specified maximum values of core
A726 Specification for Cold-Rolled Magnetic Lamination
loss. This practice applies to magnetically soft irons and steel
Quality Steel, Semiprocessed Types
(low-carbon steels and alloys of iron with silicon, aluminum,
A876 Specification for Flat-Rolled, Grain-Oriented, Silicon-
and so forth) where a core loss measurement at a stated peak
Iron, Electrical Steel, Fully Processed Types
value of alternating induction and a stated frequency, such as
A976 Classification of Insulating Coatings for Electrical
15 kG (1.5 T) and 60 Hz, is normally used to grade the
Steels by Composition, Relative Insulating Ability and
material. This practice also applies when some other property
Application
is specified (or a different induction or frequency, or both) as
A1086 Specification for Thin-Gauge Nonoriented Electrical
the limiting characteristic, provided the material also meets all
Steel Fully Processed Types
the requirements of the ASTM specification.
3. Terminology
1.2 Individual specifications that are in conformity with this
practice are Specifications A677, A683, A726, A876, and
3.1 The terms and symbols used in this practice are defined
A1086.
in Terminology A340.
1.3 The values stated in customary (cgs-emu and inch-
4. Procedure
pound) units are to be regarded as standard. The values given
4.1 General Requirements of the Core-Loss-Type
in parentheses are mathematical conversions to SI units which
Designations—The core-loss-type designations to be used for
are provided for information only and are not considered
ordering purposes and for identification of the shipped material
standard.
in ASTM specifications for electrical steels shall be a six-
1.4 This standard does not purport to address all of the
character identification (for example, 36F145) comprised of
safety concerns, if any, associated with its use. It is the
the following basic elements:
responsibility of the user of this standard to establish appro-
4.1.1 First Two Digits—The first two digits of the grade
priate safety and health practices and determine the applica-
designation shall represent the nominal decimal thickness of
bility of regulatory limitations prior to use.
the material in millimetres. For instance, the number 36
represents a thickness of 0.36 mm or 0.014 in. Refer to
2. Referenced Documents
Appendix X1 for the relationship between Electrical Sheet
2
2.1 ASTM Standards:
Gauge Number and thickness.
A340 Terminology of Symbols and Definitions Relating to
4.1.2 Code Letters—A code letter shall designate the gen-
Magnetic Testing
eral category of magnetic material and the standard sampling
and testing practices that apply. The precise conditions of
sampling and testing are given in the ASTM specification
1
This practice is under the jurisdiction of ASTM Committee A06 on Magnetic
covering each class of material. The code letter to be used and
Properties and is the direct responsibility of Subcommittee A06.02 on Material
the sampling and testing conditions associated with that letter
Specifications.
shall be as in Table 1.
Current edition approved May 1, 2014. Published May 2014. Originally
4.1.3 Last Digits—The last three digits of the grade desig-
approved in 1972. Last previous edition approved in 2011 as A664–11. DOI:
10.1520/A0664-14.
nation shall represent the maximum permissible core loss in
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
watts per pound for the test conditions indicated by the code
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
letter. For instance, the 145 designation on a standard ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. specification used in conjunction with the Code Letter F
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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A664−14
TABLE 1 Code Letters and Sampling and Testing Conditions
Code Letter ASTM Specification Class of Material and Core-Loss Te
...
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: A664 − 11 A664 − 14
Standard Practice for
Identification of Standard Electrical Steel Grades in ASTM
1
Specifications
This standard is issued under the fixed designation A664; 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 practice covers the procedure for designating (within ASTM specifications) standard grades of flat-rolled electrical
steels made to specified maximum values of core loss. This practice applies to magnetically soft irons and steel (low-carbon steels
and alloys of iron with silicon, aluminum, and so forth) where a core loss measurement at a stated peak value of alternating
induction and a stated frequency, such as 15 kG (1.5 T) and 60 Hz, is normally used to grade the material. This practice also applies
when some other property is specified (or a different induction or frequency, or both) as the limiting characteristic, provided the
material also meets all the requirements of the ASTM specification.
1.2 Individual specifications that are in conformity with this practice are Specifications A677, A683, A726, A876and , and
A876A1086.
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.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
A340 Terminology of Symbols and Definitions Relating to Magnetic Testing
A677 Specification for Nonoriented Electrical Steel Fully Processed Types
A683 Specification for Nonoriented Electrical Steel, Semiprocessed Types
A726 Specification for Cold-Rolled Magnetic Lamination Quality Steel, Semiprocessed Types
A876 Specification for Flat-Rolled, Grain-Oriented, Silicon-Iron, Electrical Steel, Fully Processed Types
A976 Classification of Insulating Coatings for Electrical Steels by Composition, Relative Insulating Ability and Application
A1086 Specification for Thin-Gauge Nonoriented Electrical Steel Fully Processed Types
3. Terminology
3.1 The terms and symbols used in this practice are defined in Terminology A340.
4. Procedure
4.1 General Requirements of the Core-Loss-Type Designations—The core-loss-type designations to be used for ordering
purposes and for identification of the shipped material in ASTM specifications for electrical steels shall be a six-character
identification (for example, 36F145) comprised of the following basic elements:
4.1.1 First Two Digits—The first two digits of the grade designation shall represent the nominal decimal thickness of the
material in millimetres. For instance, the number 36 represents a thickness of 0.36 mm or 0.014 in. Refer to Appendix X1 for the
relationship between Electrical Sheet Gauge Number and thickness.
1
This practice 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. 1, 2011May 1, 2014. Published October 2011May 2014. Originally approved in 1972. Last previous edition approved in 20062011 as
ε1
A664–06–11. . DOI: 10.1520/A0664-11.10.1520/A0664-14.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A664 − 14
4.1.2 Code Letters—A code letter shall designate the general category of magnetic material and the standard sampling and
testing practices that apply. The precise conditions of sampling and testing are given in the ASTM specification covering each class
of material. The code letter to be used and the sampling and testing conditions associated with that letter shall be as in Table 1.
TABLE 1 Code Letters and Sampling and Testing Conditions
Code Letter ASTM Sp
...
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