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This test method deals with the standard practice of measuring saturation magnetization or induction of nonmetallic magnetic materials using a vibrating sample magnetometer, which could be commercially purchased from a manufacturer or constructed with normal machine shop facilities. The test specimen shall preferably be in the form of an isotropic sphere, the size of which shall depend on the measuring apparatus. Details concerning equipment setup and calibration, the measurement procedure, and the governing equations for numerical calculations are all discussed thouroughly.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This test method covers the measurement of saturation magnetization of magnetic materials using a vibrating sample magnetometer.
1.2 Explanation of symbols and abbreviated definitions appear in the text of this test method. The official symbols and definitions are listed in Terminology A340.
1.3 The values stated in either customary (absolute (or practical) cgs-emu) units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with this method.
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 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.
A340 Terminology of Symbols and Definitions Relating to Magnetic Testing
ICS Number Code 29.030 (Magnetic materials)
UNSPSC Code 31380000(Magnets and magnetic materials)
ASTM A894 / A894M-00(2011)e1, Standard Test Method for Saturation Magnetization or Induction of Nonmetallic Magnetic Materials, ASTM International, West Conshohocken, PA, 2011, www.astm.orgBack to Top