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ASTM A811-15(2022)

Current Reaffirmation

Standard Specification for Soft Magnetic Iron Parts Fabricated by Powder Metallurgy Techniques

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1.1 This specification covers parts produced from iron powder metallurgy materials.

1.2 This specification deals with powder metallurgy parts in the sintered or annealed condition. Should the sintered parts be subjected to any secondary operation that causes mechanical strain, such as machining or sizing, they should be resintered or annealed.

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 soft magnetic iron parts fabricated by pressing and sintering of iron powder. The specification does not cover parts produced by metal injection molding. Parts produced to this specification shall have a minimum sintered density of 6.6 g/cm3 (6600 kg/m3) in the magnetically critical section of the part. Chemical requirements for the sintered part are given. Three grades distinguished by the measured maximum value of coercive field strength are defined. Apart from the required measurements of sintered density, chemical composition and coercive field strength, information on magnetic aging and its detection is given. Appendices containing magnetic and mechanical property data for a variety of sintering conditions are provided.


SDO ASTM: ASTM International
Document Number A811
Publication Date Oct. 1, 2022
Language en - English
Page Count 4
Revision Level 15(2022)
Supercedes
Committee A06.02
Publish Date Document Id Type View
April 1, 2015 A0811-15 Revision
May 10, 2003 A0811-03 Revision
April 10, 1997 A0811-97 Revision
Oct. 1, 2022 A0811-15R22 Reaffirmation
Nov. 1, 2008 A0811-03R08 Reaffirmation