ASTM-A801 › Historical Revision Information
Standard Specification for Wrought Iron-Cobalt High Magnetic Saturation Alloys (UNS R30005 and K92650)
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This specification covers wrought iron-cobalt high magnetic saturation alloys, UNS R30005 (49 % Co, 49 % Fe, 2 % V) and UNS K92650 (27 % Co, balance Fe), for use in magnetic components. The specification covers alloy supplied in form of forging billets, hot-rolled bar, hot rolled plate, cold-finished bar, and cold rolled strip. It does not cover alloy produced either by casting or by powder metallurgical techniques. The material shall conform to the chemical requirements prescribed in this specification. Magnetic property requirements and dimensional tolerances are listed. Appendices giving useful information on the heat treatment of these alloys and typical physical properties are included.
Scope
1.1 This specification covers two wrought iron-cobalt alloy types currently manufactured and supplied commercially for use in magnetic components requiring high permeability at and above 15 kG (1.5 T) or high magnetic saturation. The specific alloy types covered are:
| Alloy Type | UNS | Nominal Composition |
| 1 | R30005 | 49 % Co, 49 % Fe, 2 % V |
| 2 | K92650 | 27 % Co, 0.50 % Cr, balance Fe |
1.1.1 This specification also covers material supplied by a producer in the form and physical condition suitable for fabrication into parts that will later be given final heat treatment to achieve the desired magnetic characteristics and, where required, mechanical properties. It covers material supplied in form of forging billets, hot-rolled products, cold-finished bars, and strip.
1.2 This specification does not cover parts produced by casting or by powder metallurgical techniques.
1.3 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
core loss; iron-cobalt alloy; magnetic flux density; magnetic saturation; ICS Number Code 77.080.10 (Irons)
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Document Number
ASTM-A801-04
Revision Level
2004 EDITION
Status
Superseded
Modification Type
Revision with Designation Change
Publication Date
Oct. 1, 2004
Document Type
Specification
Page Count
5 pages
Committee Number
A06.02