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ASTM A772/A772M-00

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Standard Test Method for AC Magnetic Permeability of Materials Using Sinusoidal Current

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1.1 This test method provides a means for determination of the impedance permeability (µz) of ferromagnetic materials under the condition of sinusoidal current (sinusoidal H) excitation. Test specimens in the form of laminated toroidal cores, tape-wound toroidal cores, and link-type laminated cores having uniform cross sections and closed flux paths (no air gaps) are used. The method is intended as a means for determining the magnetic performance of ferromagnetic strip having a thickness less than or equal to 0.025 in. [0.635 mm].

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

1.3 The 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 nonconformance with this 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.


SDO ASTM: ASTM International
Document Number A772
Publication Date Oct. 10, 2000
Language en - English
Page Count 4
Revision Level 00
Supercedes
Committee A06.01
Publish Date Document Id Type View
Oct. 10, 2000 A0772_A0772M-00 Revision
Oct. 1, 2022 A0772_A0772M-00R22 Reaffirmation
April 1, 2016 A0772_A0772M-00R16 Reaffirmation
May 1, 2011 A0772_A0772M-00R11E01 Reaffirmation
May 1, 2011 A0772_A0772M-00R11 Reaffirmation
Nov. 1, 2005 A0772_A0772M-00R05 Reaffirmation