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ASTM A1054-16(2022)

Historical Reaffirmation

Standard Specification for Sintered Ferrite Permanent Magnets

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1.1 This specification covers technically important, commercially available, magnetically hard sintered ferrite permanent magnets.

1.2 Ferrite permanent magnets have residual induction Br from 0.2 T (2000 G) up to about 0.5 T (5000 G) and intrinsic coercive field strength HcJ  from 160 kA/m (2000 Oe) up to about 400 kA/m (5000 Oe). Their specific magnetic hysteresis behavior (demagnetization curve) can be characterized using Test Method A977/A977M.

1.3 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.

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

1.5 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.


This specification covers technically important, commercially available, magnetically hard sintered ceramic ferrite permanent magnets. Both barium and strontium ferrite materials are covered by this specification. Both isotropic (1 type) and anisotropic (12 types) are covered. A cross reference to both IEC and MMPA designations is provided. The magnetic property requirements for each type are defined as is the method of test. Other defined requirements include the workmanship. Typical physical properties are listed in the appendices.


SDO ASTM: ASTM International
Document Number A1054
Publication Date Oct. 1, 2022
Language en - English
Page Count 5
Revision Level 16(2022)
Supercedes
Committee A06.02
Publish Date Document Id Type View
Nov. 1, 2016 A1054-16 Revision
May 15, 2014 A1054-14 Revision
May 1, 2007 A1054-07 Revision
Oct. 1, 2022 A1054-16R22 Reaffirmation