ASTM-A839 › Historical Revision Information
Standard Specification for Iron-Phosphorus Powder Metallurgy (P/M) Parts for Soft Magnetic Applications
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Scope
1.1 This specification covers parts produced from iron-phosphorus powder metallurgy materials. These parts are used in magnetic applications requiring higher permeability and electrical resistivity and lower coercive field strength than attainable routinely from parts produced from iron powder.
1.2 Two powder types are covered; Type I containing nominally 0.45 % phosphorus, and Type II containing nominally 0.8 % phosphorus.
1.3 This specification deals with P/M 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.
1.4 The values stated in customary (cgs-emu and inch-pound) units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units which are provided for information only and are not considered standard.
Keywords
coercive field strength; iron-phosphorus; powder metallurgy (P/M); P/M parts; ICS Number Code 77.160 (Powder metallurgy)
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To find similar documents by classification:
77.160 (Powder metallurgy Including sintered metal materials and hardmetals)
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Document Number
ASTM-A839-02
Revision Level
2002 EDITION
Status
Superseded
Modification Type
Revision with Designation Change
Publication Date
Oct. 10, 2002
Document Type
Specification
Page Count
5 pages
Committee Number
A06.02