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Significance and Use
4.1 Lamination factor, S, indicates the deficiency of effective steel volume which is due to the presence of oxides, roughness, insulating coatings, and other conditions affecting the steel surface.
4.2 The term Lamination Factor, S, pertains strictly to the determination of the proportion of material as defined by precise sampling and procedures of this test method. Alternative usage of the term Lamination Factor has evolved to include sampling and procedures outside of the context of this test method. Consideration of alternative sampling and procedures should not be included within the scope of this test method.
1.1 This test method covers measurement of the lamination factor (Note 1) of a specimen composed of strips cut from magnetic material.
1.2 This test method shall be used in conjunction with Practice A34/A34M.
1.3 The values and equations stated in customary (cgs-emu and inch-pound) or SI units are to be regarded separately as standard. Within this test method, 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 test method.
1.4 This standard does not purport to address the safety concerns 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A34/A34M Practice for Sampling and Procurement Testing of Magnetic Materials
ICS Number Code 29.030 (Magnetic materials)
UNSPSC Code 31380000(Magnets and magnetic materials)
ASTM A719 / A719M-14, Standard Test Method for Lamination Factor of Magnetic Materials, ASTM International, West Conshohocken, PA, 2014, www.astm.orgBack to Top