ASTM A876-17
(Specification)Standard Specification for Flat-Rolled, Grain-Oriented, Silicon-Iron, Electrical Steel, Fully Processed Types
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. 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).
1.2 These grain-oriented electrical steels are low-carbon, silicon-iron alloys with a silicon content of approximately 3.2 % in which low core loss and high permeability in the direction of rolling have been achieved by appropriate metallurgical processing.
1.3 The electrical-steel grades described in this specification include (1) conventional grain-oriented electrical steel tested at 1.5 T (15 kG) in accordance with Test Method A343/A343M, (2) conventional grain-oriented electrical steel tested at 1.7 T (17 kG) in accordance with Test Method A343/A343M, (3) high-permeability grain-oriented electrical steel tested at 1.7 T (17 kG) in accordance with Test Method A343/A343M, and (4) laser-scribed high-permeability grain-oriented electrical steel tested at 1.7 T (17 kG) in accordance with Test Methods A804/A804M.
1.4 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.
1.5 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.
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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Designation:A876 −17
Standard Specification for
Flat-Rolled, Grain-Oriented, Silicon-Iron, Electrical Steel,
1
Fully Processed Types
This standard is issued under the fixed designation A876; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.1 This specification covers the detailed requirements to
mendations issued by the World Trade Organization Technical
which the specified grades of flat-rolled, grain-oriented, fully
Barriers to Trade (TBT) Committee.
processed electrical steels shall conform.These steels are used
primarily in transformer cores operating at moderate to high
2. Referenced Documents
magnetic flux densities at commercial power frequencies (50
and 60 Hz). 2
2.1 ASTM Standards:
1.2 These grain-oriented electrical steels are low-carbon, A34/A34MPractice for Sampling and Procurement Testing
silicon-iron alloys with a silicon content of approximately of Magnetic Materials
3.2% in which low core loss and high permeability in the
A340Terminology of Symbols and Definitions Relating to
direction of rolling have been achieved by appropriate metal- Magnetic Testing
lurgical processing.
A343/A343MTest Method for Alternating-Current Mag-
netic Properties of Materials at Power Frequencies Using
1.3 Theelectrical-steelgradesdescribedinthisspecification
Wattmeter-Ammeter-Voltmeter Method and 25-cm Ep-
include(1)conventionalgrain-orientedelectricalsteeltestedat
stein Test Frame
1.5 T (15 kG) in accordance with Test Method A343/A343M,
A345Specification for Flat-Rolled Electrical Steels for
(2) conventional grain-oriented electrical steel tested at 1.7 T
Magnetic Applications
(17 kG) in accordance with Test Method A343/A343M,(3)
A664Practice for Identification of Standard Electrical Steel
high-permeability grain-oriented electrical steel tested at 1.7 T
Grades in ASTM Specifications
(17kG)inaccordancewithTestMethodA343/A343M,and(4)
A700Guide for Packaging, Marking, and Loading Methods
laser-scribed high-permeability grain-oriented electrical steel
for Steel Products for Shipment
tested at 1.7 T (17 kG) in accordance with Test Methods
A717/A717MTestMethodforSurfaceInsulationResistivity
A804/A804M.
of Single-Strip Specimens
1.4 The values stated in SI units are to be regarded as
A719/A719MTest Method for Lamination Factor of Mag-
standard. The values given in parentheses are mathematical
netic Materials
conversions to customary (cgs-emu and inch-pound) units
A721/A721MTest Method for Ductility of Oriented Electri-
whichareprovidedforinformationonlyandarenotconsidered
cal Steel
standard.
A804/A804MTest Methods for Alternating-Current Mag-
1.5 This standard does not purport to address all of the
netic Properties of Materials at Power Frequencies Using
safety concerns, if any, associated with its use. It is the
Sheet-Type Test Specimens
responsibility of the user of this standard to establish appro-
A937/A937MTest Method for Determining Interlaminar
priate safety and health practices and determine the applica-
Resistance of Insulating Coatings Using Two Adjacent
bility of regulatory limitations prior to use.
Test Surfaces
1.6 This international standard was developed in accor-
A976Classification of Insulating Coatings for Electrical
dance with internationally recognized principles on standard-
Steels by Composition, Relative Insulating Ability and
Application
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.
2
This specification replaces A665, A725, and A843. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2017. Published May 2017. Originally contactASTM Customer Service at service@astm.org. ForAnnual Book ofASTM
approved in 1987. Last previous edition approved in 2012 as A876–12. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/A0876-17. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A876−17
3. Terminology application is in spirally wound or formed cores in which strip
curvatureisnotdetrimentaltofabricatingproceduresordevice
3.1 The terms and symbols used in this specification are
performance.
defined in Terminology A340.
5.1.3 Condition F5—Thermally flattened sheet or coiled
strip having an inorganic surface coating, Type C-2, plus an
...
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: A876 − 12 A876 − 17
Standard Specification for
Flat-Rolled, Grain-Oriented, Silicon-Iron, Electrical Steel,
1
Fully Processed Types
This standard is issued under the fixed designation A876; 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 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).
1.2 These grain-oriented electrical steels are low-carbon, silicon-iron alloys with a silicon content of approximately 3.2 % in
which low core loss and high permeability in the direction of rolling have been achieved by appropriate metallurgical processing.
1.3 The electrical-steel grades described in this specification include (1) conventional grain-oriented electrical steel tested at 15
kG (1.5 T)1.5 T (15 kG) in accordance with Test Method A343/A343M, (2) conventional grain-oriented electrical steel tested at
17 kG (1.7 T)1.7 T (17 kG) in accordance with Test Method A343/A343M, (3) high-permeability grain-oriented electrical steel
tested at 17 kG (1.7 T)1.7 T (17 kG) in accordance with Test Method A343/A343M, and (4) laser-scribed high-permeability
grain-oriented electrical steel tested at 17 kG (1.7 T)1.7 T (17 kG) in accordance with Test Methods A804/A804M.
1.4 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.
1.5 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.
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.
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
A343/A343M Test Method for Alternating-Current Magnetic Properties of Materials at Power Frequencies Using Wattmeter-
Ammeter-Voltmeter Method and 25-cm Epstein Test Frame
A345 Specification for Flat-Rolled Electrical Steels for Magnetic Applications
A664 Practice for Identification of Standard Electrical Steel Grades in ASTM Specifications
A700 Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
A717/A717M Test Method for Surface Insulation Resistivity of Single-Strip Specimens
A719/A719M Test Method for Lamination Factor of Magnetic Materials
A721/A721M Test Method for Ductility of Oriented Electrical Steel
A804/A804M Test Methods for Alternating-Current Magnetic Properties of Materials at Power Frequencies Using Sheet-Type
Test Specimens
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.
This specification replaces A665, A725, and A843.
Current edition approved Nov. 1, 2012April 1, 2017. Published December 2012May 2017. Originally approved in 1987. Last previous edition approved in 20092012 as
ε1
A876A876 – 12.–09 . DOI: 10.1520/A0876-12.10.1520/A0876-17.
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 ----------------------
A876 − 17
A937/A937M Test Method for Determining Interlaminar Resistance of Insulating Coatings Using Two Adjacent
...
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