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Significance and Use
3.1 Lamination factor S indicates the deficiency of effective material volume which is due to the presence of oxides, roughness, insulating coatings, and other conditions affecting the strip surface.
3.2 This test method is used to predict the fraction of metal that is included in the volume of the firm coil wound from the specimen tape.
1.1 This test method covers measurements of lamination factor ( ) of a specimen composed of strips cut from amorphous magnetic material. It is suitable for the determination of lamination factor for thin, flat case, metallic strip ranging in width from 0.25 to 8.00 in. [6.35 mm to 203 mm] and in thickness from 0.0005 to 0.005 in. [12.7 to 127 μm].
Note 1: Lamination factor is also termed space factor or stacking factor.
1.2 The values and equations stated in customary (egs-emu and inch-pound) or SI units are to be regarded separately as standard. Within this standard, SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with this standard.
1.3 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.
1.4 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.
ICS Number Code 29.030 (Magnetic materials)
UNSPSC Code 31380000(Magnets and magnetic materials)
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ASTM A900 / A900M-01(2018), Standard Test Method for Lamination Factor of Amorphous Magnetic Strip, ASTM International, West Conshohocken, PA, 2018, www.astm.orgBack to Top