ASTM A876-17e1
(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. 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.
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.
General Information
Relations
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.
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Designation:A876 −17
Standard Specification for
Flat-Rolled, Grain-Oriented, Silicon-Iron, Electrical Steel,
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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
ε NOTE—Editorially corrected units in Note B of Table X1.1 in July 2017.
1. Scope 1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This specification covers the detailed requirements to
ization established in the Decision on Principles for the
which the specified grades of flat-rolled, grain-oriented, fully
Development of International Standards, Guides and Recom-
processed electrical steels shall conform.These steels are used
mendations issued by the World Trade Organization Technical
primarily in transformer cores operating at moderate to high
Barriers to Trade (TBT) Committee.
magnetic flux densities at commercial power frequencies (50
and 60 Hz).
2. Referenced Documents
1.2 These grain-oriented electrical steels are low-carbon,
2
2.1 ASTM Standards:
silicon-iron alloys with a silicon content of approximately
A34/A34MPractice for Sampling and Procurement Testing
3.2% in which low core loss and high permeability in the
of Magnetic Materials
direction of rolling have been achieved by appropriate metal-
A340Terminology of Symbols and Definitions Relating to
lurgical processing.
Magnetic Testing
1.3 Theelectrical-steelgradesdescribedinthisspecification
A343/A343MTest Method for Alternating-Current Mag-
include(1)conventionalgrain-orientedelectricalsteeltestedat
netic Properties of Materials at Power Frequencies Using
1.5 T (15 kG) in accordance with Test Method A343/A343M,
Wattmeter-Ammeter-Voltmeter Method and 25-cm Ep-
(2) conventional grain-oriented electrical steel tested at 1.7 T
stein Test Frame
(17 kG) in accordance with Test Method A343/A343M,(3)
A345Specification for Flat-Rolled Electrical Steels for
high-permeability grain-oriented electrical steel tested at 1.7 T
Magnetic Applications
(17kG)inaccordancewithTestMethodA343/A343M,and(4)
A664Practice for Identification of Standard Electrical Steel
laser-scribed high-permeability grain-oriented electrical steel
Grades in ASTM Specifications
tested at 1.7 T (17 kG) in accordance with Test Methods
A700Guide for Packaging, Marking, and Loading Methods
A804/A804M.
for Steel Products for Shipment
A717/A717MTestMethodforSurfaceInsulationResistivity
1.4 The values stated in SI units are to be regarded as
of Single-Strip Specimens
standard. The values given in parentheses are mathematical
A719/A719MTest Method for Lamination Factor of Mag-
conversions to customary (cgs-emu and inch-pound) units
netic Materials
whichareprovidedforinformationonlyandarenotconsidered
A721/A721MTest Method for Ductility of Oriented Electri-
standard.
cal Steel
1.5 This standard does not purport to address all of the
A804/A804MTest Methods for Alternating-Current Mag-
safety concerns, if any, associated with its use. It is the
netic Properties of Materials at Power Frequencies Using
responsibility of the user of this standard to establish appro-
Sheet-Type Test Specimens
priate safety and health practices and determine the applica-
A937/A937MTest Method for Determining Interlaminar
bility of regulatory limitations prior to use.
Resistance of Insulating Coatings Using Two Adjacent
Test Surfaces
A976Classification of Insulating Coatings for Electrical
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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.
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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/A0876-17E01. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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A876−17
Steels by Composition, Relative Insulating Ability and C-5, applied over the inherent C-2 coating. The principal
Application application is in spirally wound or formed cores
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