ASTM A 342/A 342M - 99 Standard Test Methods for Permeability of Feebly Magnetic Materials

American Society for Testing and Materials (ASTM). Current edition approved Oct. 10, 1999. Published January 2000. 5p. These test methods cover three procedures for determination of the permeability [relative permeability] of materials having a permeability not exceeding 4.0.
The test methods covered are as follows:
- Test Method 1 is suitable for materials with permeabilities between 1.0 and 4.0.
- Test Method 2 is suitable for measuring the permeability of paramagnetic materials having a permeability less than 1.05.
- Test Method 3 is a suitable means of measuring the permeability of a material as less than or greater than that of calibrated standard inserts designated for use in a Low-Mu Permeability Indicator.