ASTM-A1054 › Historical Revision Information
Standard Specification for Sintered Ferrite Permanent Magnets

ASTM-A1054 - 2016 EDITION - SUPERSEDED
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This specification covers technically important, commercially available, magnetically hard sintered ceramic ferrite permanent magnets. Magnetic properties such as remanence, coercive field strength, and relative recoil permeability shall be measured. The specified magnetic properties are valid only for magnet test specimens with a uniform cross-section along the axis of magnetization. Properties for anisotropic magnets shall be measured along the axis of preferred orientation.

ORDER

Scope

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

Keywords

ceramic magnet; coercive field strength; ferrite; ferrite magnet; hard ferrite; magnetic induction; magnetic properties; permanent magnet; sintered ceramic ferrite; sintered ferrite magnet;

To find similar documents by ASTM Volume:

03.04 (Magnetic Properties)

To find similar documents by classification:

29.030 (Magnetic materials Steels with special magnetic properties, see 77.140.40)

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Document Number

ASTM-A1054-16

Revision Level

2016 EDITION

Status

Superseded

Modification Type

Revision with Title Change

Publication Date

Nov. 15, 2016

Document Type

Specification

Page Count

5 pages

Committee Number

A06.02