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ASTM A 343/A343M : 2014 : R2019

Current

Current

The latest, up-to-date edition.

Standard Test Method for Alternating-Current Magnetic Properties of Materials at Power Frequencies Using Wattmeter-Ammeter-Voltmeter Method and 25-cm Epstein Test Frame

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

01-04-2019

€61.92
Excluding VAT

Committee
A 06
DocumentType
Test Method
Pages
17
PublisherName
American Society for Testing and Materials
Status
Current
Supersedes

1.1This test method covers tests for the magnetic properties of basic flat-rolled magnetic materials at power frequencies (25 to 400 Hz) using a 25-cm Epstein test frame and the 25-cm double-lap-jointed core. It covers the determination of core loss, rms exciting power, rms and peak exciting current, and several types of ac permeability and related properties of flat-rolled magnetic materials under ac magnetization.

1.2This test method shall be used in conjunction with Practice A34/A34M.

1.3This test method2 provides a test for core loss and exciting current at moderate and high magnetic flux densities up to 15 kG [1.5 T] on nonoriented electrical steels and up to 18 kG [1.8 T] on grain-oriented electrical steels.

1.4The frequency range of this test method is normally that of the commercial power frequencies 50 to 60 Hz. With proper instrumentation, it is also acceptable for measurements at other frequencies from 25 to 400 Hz.

1.5This test method also provides procedures for calculating ac impedance permeability from measured values of rms exciting current and for ac peak permeability from measured peak values of total exciting currents at magnetic field strengths up to about 150 Oe [12 000 A/m].

1.6Explanation of symbols and abbreviated definitions appear in the text of this test method. The official symbols and definitions are listed in Terminology A340.

1.7The values and equations stated in customary (cgs-emu and inch-pound) or SI units are to be regarded separately as standard. Within this standard, SI units are shown in brackets except for the sections concerning calculations where there are separate sections for the respective unit systems. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with this standard.

1.8This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.9This 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.

ASTM A 340 : 2023 : REV A Standard Terminology of Symbols and Definitions Relating to Magnetic Testing
ASTM A 34/A34M : 2006 : R2021 Standard Practice for Sampling and Procurement Testing of Magnetic Materials
ASTM E 1338 : 2009 : R2015 Standard Guide for Identification of Metals and Alloys in Computerized Material Property Databases
ASTM E 177 : 1990 : REV A : R1996 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
ASTM E 1338 : 2009 : R2021 : EDT 1 Standard Guide for Identification of Metals and Alloys in Computerized Material Property Databases
ASTM A 876 : 2017 : EDT 1 Standard Specification for Flat-Rolled, Grain-Oriented, Silicon-Iron, Electrical Steel, Fully Processed Types
ASTM E 1338 : 2009 : R2021 Standard Guide for Identification of Metals and Alloys in Computerized Material Property Databases
ASTM E 1338 : 1997 Standard Guide for The Identification of Metals and Alloys in Computerized Material Property Databases
ASTM A 34/A34M : 2006 : R2018 Standard Practice for Sampling and Procurement Testing of Magnetic Materials
ASTM A 340 : 2021 Standard Terminology of Symbols and Definitions Relating to Magnetic Testing
ASTM E 691 : 2020 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 691 : 2019 : EDT 1 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM A 677 : 2016 Standard Specification for Nonoriented Electrical Steel Fully Processed Types
ASTM E 691 : 2023 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 691 : 2022 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM A 677 : 2016 : R2023 Standard Specification for Nonoriented Electrical Steel Fully Processed Types
ASTM E 691 : 2009 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 691 : 2021 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM A 340 : 2020 Standard Terminology of Symbols and Definitions Relating to Magnetic Testing
ASTM A 683 : 2016 Standard Specification for Nonoriented Electrical Steel, Semiprocessed Types
ASTM A 340 : 2022 Standard Terminology of Symbols and Definitions Relating to Magnetic Testing
ASTM A 683 : 2016 : R2023 Standard Specification for Nonoriented Electrical Steel, Semiprocessed Types
ASTM A 340 : 2023 Standard Terminology of Symbols and Definitions Relating to Magnetic Testing

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