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ASTM E1004-99

Historical Revision

Standard Test Method for Determining Electrical Conductivity Using the Electromagnetic (Eddy Current) Method

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1.1 This test method describes a procedure for measuring the electrical conductivity of nonmagnetic metals using the electromagnetic (eddy current) method. The procedure has been written primarily for use with commercially available electrical conductivity instruments. General purpose eddy-current instruments may also be used for electrical conductivity measurements but will not be addressed in this test method.

1.2 This test method is applicable to metals that have a flat or slightly curved surface, and metals that may have a thin nonconductive coating.

1.3 Eddy-current measurements of electrical conductivity may be used in the sorting of metals with respect to variables such as: type of alloy, aging, cold deformation, heat treatment, effects associated with nonuniform heating or overheating, and effects of corrosion. The usefulness of tests of these properties is dependent on the amount of electrical conductivity change caused by a change in the specific variable.

1.4 Electrical conductivity, when measured by eddy-current instruments, usually is expressed as a percentage of the conductivity of the International Annealed Copper Standard (IACS). The conductivity of the Annealed Copper Standard (100% IACS) is defined to be 0.58 X 108 S/m at 20°C.

1.5 This standard does not purport to address the safety problems, 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.


SDO ASTM: ASTM International
Document Number E1004
Publication Date Aug. 10, 1999
Language en - English
Page Count 4
Revision Level 99
Supercedes
Committee E07.07
Publish Date Document Id Type View
Dec. 1, 2023 E1004-23 Revision
June 1, 2017 E1004-17 Revision
May 15, 2009 E1004-09 Revision
July 10, 2002 E1004-02 Revision
Aug. 10, 1999 E1004-99 Revision