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    ASTM E1004 - 17

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

    Active Standard ASTM E1004 | Developed by Subcommittee: E07.07

    Book of Standards Volume: 03.03

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    Significance and Use

    4.1 Absolute probe coil methods, when used in conjunction with reference standards of known value, provide a means for determining the electrical conductivity of nonmagnetic materials.

    4.2 Electrical conductivity of a sample, when used in conjunction with another method listed and compared to reference charts, can be used as a means of  determining: (1) type of metal or alloy, (2) type of heat treatment (for aluminum this evaluation should be used in conjunction with a hardness examination), (3) aging of the alloy, (4) effects of corrosion, (5) heat damage, (6) temper, and (7) hardness.

    1. Scope

    1.1 This test method covers a procedure for determining the electrical conductivity of nonmagnetic metals using the electromagnetic (eddy current) method. The procedure has been written primarily for use with commercially available direct reading 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 either a flat or slightly curved surface and includes metals with or without a thin nonconductive coating.

    1.3 Eddy current determinations 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 non-uniform heating or overheating, and effects of corrosion. The usefulness of the examinations 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 evaluated with eddy current instruments, is usually expressed as a percentage of the conductivity of the International Annealed Copper Standard (% IACS) or Siemens/meter (S/m). The conductivity of the Annealed Copper Standard is defined to be 0.58  × 108 S/m (100 % IACS) at 20°C.

    1.5 The values stated in SI units are regarded as standard.

    1.6 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.

    1.7 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.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    B193 Test Method for Resistivity of Electrical Conductor Materials

    E10 Test Method for Brinell Hardness of Metallic Materials

    E18 Test Methods for Rockwell Hardness of Metallic Materials

    E105 Practice for Probability Sampling of Materials

    E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process

    E140 Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness

    E543 Specification for Agencies Performing Nondestructive Testing

    E1251 Test Method for Analysis of Aluminum and Aluminum Alloys by Spark Atomic Emission Spectrometry

    E1316 Terminology for Nondestructive Examinations

    E2371 Test Method for Analysis of Titanium and Titanium Alloys by Direct Current Plasma and Inductively Coupled Plasma Atomic Emission Spectrometry (Performance-Based Test Methodology)

    AIA Document

    NAS–410 Certification and Qualification of Nondestructive Testing Personnel

    ISO Standard

    ISO 9712

    ASNT Documents

    SNT-TC-1A Recommended Practice for Personnel Qualification and Certification In Nondestructive Testing

    ICS Code

    ICS Number Code 17.220.20 (Measurement of electrical and magnetic quantities)

    UNSPSC Code

    UNSPSC Code

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/E1004-17

    Citation Format

    ASTM E1004-17, Standard Test Method for Determining Electrical Conductivity Using the Electromagnetic (Eddy Current) Method , ASTM International, West Conshohocken, PA, 2017, www.astm.org

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