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ASTM A677M-98a

(Specification)

Standard Specification for Nonoriented Electrical Steel, Fully Processed Types (Metric) (Withdrawn 2000)

Standard Specification for Nonoriented Electrical Steel, Fully Processed Types (Metric) (Withdrawn 2000)

SCOPE
1.1 This specification covers the detailed requirements to which flat-rolled nonoriented fully processed electrical steel shall conform.
1.2 This steel is produced to specified maximum core-loss values and is intended primarily for commercial power frequency (50 and 60 Hz) applications in magnetic devices. Desirable core loss and permeability characteristics are developed during mill processing, so further heat treatment by the purchaser is not usually necessary.
1.3 These nonoriented fully processed electrical steels are low-carbon, silicon-iron or silicon-aluminum-iron alloys containing up to about 3.5% silicon and a small amount of aluminum.
Note 1-This specification is the metric companion of Specification A677.

General Information

Status
Withdrawn
Publication Date
09-Oct-1998
ICS
77.140.50 - Flat steel products and semi-products
Technical Committee
A06 - Magnetic Properties
Drafting Committee
A06.02 - Material Specifications
Current Stage
Ref Project

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ASTM A677M-98a - Standard Specification for Nonoriented Electrical Steel, Fully Processed Types (Metric) (Withdrawn 2000)ASTM A677M-98a - Standard Specification for Nonoriented Electrical Steel, Fully Processed Types (Metric) (Withdrawn 2000)
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ASTM A677M-98a - Standard Specification for Nonoriented Electrical Steel, Fully Processed Types (Metric) (Withdrawn 2000)
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STD-ASTM Ab77M REV A-ENGL 1798 W 075951U Ob32127 72T W
Designation: A 677M - 98a
An American National Standard
METRIC
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Nonoriented Electrical Steel, Fully Processed Types
(Metric) ’
This standard is issued under the fixed designation A 677M; 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.
A 720 Test Method for Ductility of Nonoriented Electrical
1. Scope
Steel
1.1 This specification covers the detailed requirements to
A 937 Test Method for Determining Interlaminar Resis-
which flat-rolled nonoriented fully processed electrical steel
tance of Insulating Coatings Using Two Adjacent Test
shall conform.
Surfaces2
1.2 This steel is produced to specified maximum core-loss
A 976 Classification of Insulating Coatings by Composi-
values and is intended primarily for commercial power fre-
tion, Relative Insulating Ability and Application’
quency (50- and 60-Hz) applications in magnetic devices.
E 18 Test Methods for Rockwell Hardness and Rockwell
Desirable core-loss and permeability characteristics are devel-
Superficial Hardness of Metallic Materiais
oped during mill processing, so additional heat treatment by
the purchaser is not usually necessary.
3. Terminology
1.3 These nonoriented fully processed electrical steels are
3.1 Dejînitions: The terms and symbols used in this speci-
low-carbon, silicon-iron, or silicon-aluminum-iron alloys con-
fication are defined in Terminology A 340.
taining up to about 3.5 % silicon and a small amount of
aluminum.
4. Classification
NOTE I-This specification is the metric companion of Specification
4.1 The nonoriented electrical steel types described by this
A 677.
specification are as shown in Table I.
2. Referenced Documents
5. Ordering Information
2. I ASTM Standards:
5.1 Orders for material under this specification shall include
A34 Practice for Procurement Testing, and Sampling of
as much of the following information as necessary to describe
Magnetic Materials
the desired material adequately:
A 340 Terminology of Symbols and Definitions Relating to
5.1.1 ASTM specification number.
Magnetic Testing
5.1.2 Core-loss type number.
A 343 Test Method for Alternating-Current Magnetic Prop-
5.1.3 Surface coating type.
erties of Materials at Power Frequencies Using Wattmeter-
5.1.4 Thickness, width, and length (if in cut lengths instead
Ammeter-Voltmeter Method and 25-cm Epstein Test
of coils).
Frame
5.1.5 Total weight of ordered item.
A 664 Practice for Identification of Standard Electrical- and
5.1.6 Limitations in coil size or lift weights.
Lamination-Steel Grades in ASTM Specifications
5.1.7 End Use-The purchaser shall disclose as much
A 700 Practices for Packaging, Marking, and Loading
pertinent information as possible about the intended applica-
Methods for Steel Products for Domestic Shipment
tion to enable the supplier to provide material characteristics
A 717/A 717M Test Method for Surface Insulation Resis-
most suitable for specific fabricating practices.
tivity of Single-Strip Specimens *
5.1.8 Special requirements or exceptions to the provisions
A 719 Test Method for Lamination Factor of Magnetic
of this specification.
Materials
6. Manufacture
6.1 Typical Melting and Casting:
’ This specification is under the jurisdiction of ASTM Committee A-6 on
6.1.1 These fully processed electrical steels may be made by
Magnetic Properties and is the direct responsibility of Subcommittee A06.02 on
basic-oxygen, electric-fumace, or other steelmaking practice.
Material Specifications.
Current edition approved Oct. IO, 1998. Published February 1999. Originally
published as A 677M - 83. Last previous edition A 677M - 98.
’ Annual Book of ASTM Standurd.s, Vol 03.04.
Annual Book of ASTM Standards, Vol 01.05. Annual Book of ASTM Síunùurds, Vol 03.01.
I

---------------------- Page: 1 ----------------------
(# A677M
TABLE 1 Core-Loss Types A and Maximum Core Losses Bat 15 T for As-Sheared Epstein Specimens
~~~
0.36-mm Thickness 0.47-mm Thickness 0.64-mm Thickness
~~~ ~
Core-Loss Maximum Core Loss, Wlkg Core-Loss Maximum Core Loss, W/kg Core-Loss Maximum Core Loss, W/kg
Type Type
Type
60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz
36F320M 3.20 2.53 . . . . . .
36F342M 3.42 2.70 47F364M 3.64 2.87 4.41 3.48
64F441 M
36F364M 3.64 2.87 47F397M 3.97 3.13 64F463M 4.63 3.66
36F386M 3.86 3.05 47F419M 4.19 3.31 64F496M 4.96 3.92
36F408M 4.08 3.22 47F441 M 4.41 3.48 64F518M 5.18 4.09
36F430M 4.30 3.40 47F463M 4.63 3.66 64F551 M 5.51 4.35
36F452M 4.52 3.57 47F529M 5.29
...

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This specification covers the detailed requirements for specified grades of flat-rolled, grain-oriented, fully processed low-carbon silicon-iron electrical steels, whose low core loss and high permeability in the direction of rolling have been achieved by appropriate metallurgical processing. These steels are primarily used in transformer cores operating at moderate to high magnetic flux densities at commercial power frequencies. The ASTM core-loss type designations for the electrical steels covered here are 18G041, 23G045, 27G051, 30G058, 35G066, 23H070, 27H074, 30H083, 35H094, 23P060, 27P066, 23Q054, and 27Q057. Steels may be acquired in any of four conditions, classified according to a combination of material form and surface type or treatment as desired for the expected end use. Materials shall conform to specified values of magnetic properties (core loss, permeability, and magnetic aging), physical dimensions (thickness, length, and width), and mechanical properties (lamination factor and ductility).
SCOPE
1.1 This specification covers the detailed requirements to which the specified grades of flat-rolled, grain-oriented, fully processed electrical steels shall conform. These steels are used primarily in transformer cores operating at moderate to high magnetic flux densities at commercial power frequencies (50 and 60 Hz).  
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Standard Specification for Flat-Rolled, Grain-Oriented, Silicon-Iron, Electrical Steel, Fully Processed Types

ABSTRACT
This specification covers the detailed requirements for specified grades of flat-rolled, grain-oriented, fully processed low-carbon silicon-iron electrical steels, whose low core loss and high permeability in the direction of rolling have been achieved by appropriate metallurgical processing. These steels are primarily used in transformer cores operating at moderate to high magnetic flux densities at commercial power frequencies. These steels may be acquired in any of four conditions a.) conventional grain-oriented tested at 15 kG (1.5 T), b.) conventional grain-oriented tested at 17 kG (1.7 T), c.) high-permeability grain-oriented tested at 17 kG (1.7 T) and d.) laser-scribed high-permeability grain-oriented tested at 17 kG (1.7 T). These steels can be purchased in a number of combinations of material form and surface type or treatment. This specification explains in detail, the available forms, thicknesses and magnetic performance.
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1.6 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.

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4.1 This is a specialized bend test for nonoriented electrical steel not covered under the provisions of Test Methods E290.  
4.2 This test is applicable to nonoriented silicon steel such as described in Specifications A677 and A683 in commercial thicknesses.  
4.3 It is not intended to be applied to steels considered inherently ductile.
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