ASTM A664-15

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 specific core loss. This practice applies to magnetically soft irons and steel (low-carbon steels and alloys of iron with silicon, aluminum, and other alloying elements) where a core loss measurement at a stated peak value of alternating induction and a stated frequency, such as 1.5 T (15 kG) 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 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.  
1.4 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.

General Information

• Status: Historical
• Publication Date: 31-Mar-2015
• ICS: 77.080.20 - Steels
• Technical Committee: A06 - Magnetic Properties
• Drafting Committee: A06.02 - Material Specifications

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A664 −15
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 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 specific
A726 Specification for Cold-Rolled Magnetic Lamination
core loss. This practice applies to magnetically soft irons and
Quality Steel, Semiprocessed Types
steel (low-carbon steels and alloys of iron with silicon,
A876 Specification for Flat-Rolled, Grain-Oriented, Silicon-
aluminum, and other alloying elements) where a core loss
Iron, Electrical Steel, Fully Processed Types
measurementatastatedpeakvalueofalternatinginductionand
A976 Classification of Insulating Coatings for Electrical
a stated frequency, such as 1.5 T (15 kG) and 60 Hz, is
Steels by Composition, Relative Insulating Ability and
normally used to grade the material. This practice also applies
Application
when some other property is specified (or a different induction
A1086 Specification for Thin-Gauge Nonoriented Electrical
or frequency, or both) as the limiting characteristic, provided
Steel Fully Processed Types
the material also meets all 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 SI units are to be regarded as
4. Procedure
standard. The values given in parentheses are mathematical
conversions to customary (cgs-emu and inch-pound) units
4.1 General Requirements of the Core-Loss-Type
whichareprovidedforinformationonlyandarenotconsidered
Designations—The core-loss-type designations to be used for
standard.
ordering purposes and for identification of the shipped material
1.4 This standard does not purport to address all of the
in ASTM specifications for electrical steels shall follow a
safety concerns, if any, associated with its use. It is the
six-character protocol (for example, 35H094) comprised of the
responsibility of the user of this standard to establish appro-
elements described in 4.2, 4.3, and 4.4:
priate safety and health practices and determine the applica-
4.2 First Two Digits—The first two digits of the grade
bility of regulatory limitations prior to use.
designation shall represent the nominal thickness of the mate-
2. Referenced Documents
rial in millimetres to the nearest one hundredth millimetre
2 multiplied by 100. For instance, the number 36 represents a
2.1 ASTM Standards:
thickness of 0.36 mm (0.014 in.).
A340 Terminology of Symbols and Definitions Relating to
4.2.1 Designation of nominal thickness by Electrical Sheet
Magnetic Testing
Gauge Number does not conform to the requirements of this
practice or of specifications referred to herein. Refer to
1
This practice is under the jurisdiction of ASTM Committee A06 on Magnetic
Appendix X1 for the relationship between Electrical Sheet
Properties and is the direct responsibility of Subcommittee A06.02 on Material
Gauge Number and nominal thickness in millimetres and
Specifications.
Current edition approved April 1, 2015. Published April 2015. Originally
inches.
approved in 1972. Last previous edition approved in 2014 as A664–14. DOI:
10.1520/A0664-15.
4.3 Code Letters—A code letter shall designate the general
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
category of magnetic material and the standard sampling and
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
testing practices that apply. The precise conditions of sampling
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. and testing are given in theASTM specification covering each
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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A664−15
class of material. The code letter to be used and the sampling perpendicular to the rolling direction. The three digit designa-
and testing conditions associated with that letter shall be as in tion 155 is based on the reference value of 1.55 W/lb for the
Table 1. maximum value of specific c
...

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 − 14 A664 − 15
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 specific core loss. This practice applies to magnetically soft irons and steel
(low-carbon steels and alloys of iron with silicon, aluminum, and so forth) other alloying elements) where a core loss measurement
at a stated peak value of alternating induction and a stated frequency, such as 15 kG (1.5 T)1.5 T (15 kG) 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) SI units are to be regarded as standard. The values given in
parentheses are mathematical conversions to SI customary (cgs-emu and inch-pound) 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 follow a six-character
protocol (for example, 35H094) comprised of the elements described in 4.2, 4.3, and 4.4:
4.2 First Two Digits—The first two digits of the grade designation shall represent the nominal thickness of the material in
millimetres to the nearest one hundredth millimetre multiplied by 100. For instance, the number 36 represents a thickness of 0.36
mm (0.014 in.).
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 May 1, 2014April 1, 2015. Published May 2014April 2015. Originally approved in 1972. Last previous edition approved in 20112014 as
A664–11.–14. DOI: 10.1520/A0664-14.10.1520/A0664-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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 − 15
4.2.1 Designation of nominal thickness by Electrical Sheet Gauge Number does not conform to the requirements of this practice
or of specifications referred to herein. Refer to Appendix X1 for the relationship between Electrical Sheet Gauge Number and
nominal thickness in millimetres and inches.
4.3 Code Letters—A code letter shall designate the general category of magnetic material and the standard sampling and testing
p
...