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  • ASTM E 1225 : 1999

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    Standard Test Method for Thermal Conductivity of Solids by Means of the Guarded-Comparative-Longitudinal Heat Flow Technique

    Available format(s): 

    Superseded date:  11-11-2014


    Published date:  10-03-1999

    Publisher:  American Society for Testing and Materials

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    1.1 This test method describes a steady state technique for the determination of the thermal conductivity, [lambda], of homogeneous-opaque solids (see Notes 1 and 2). This test method is for materials with effective conductivities in the approximate range 0.2 ∧ [lambda] ∧ 200 W/ [dot]K over the approximate temperature range between 90 and 1300 K. It can be used outside these ranges with decreased accuracy.

    Note 1-For purposes of this technique, a system is homogeneous if the apparent thermal conductivity of the specimen, [lambda] , does not vary with changes of thickness or cross-sectional area by more than +5%. For composites or heterogeneous systems consisting of slabs or plates bonded together, the specimen should be more than 20 units wide and 20 units thick, respectively, where a unit is the thickness of the thickest slab or plate, so that diameter or length changes of one-half unit will affect the apparent [lambda] by less than +5%. For systems that are non-opaque or partially transparent in the infrared, the combined error due to inhomogeneity and photon transmission should be less than +5%. Measurements on highly transparent solids must be accompanied with infrared absorption coefficient information or the results must be reported as apparent [lambda] . Note 2-This test method may also be used to evaluate the thermal conductance/resistance of materials in contact.

    1.2 This standard does not purport to address all of 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.

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    Committee E 37
    Document Type Test Method
    Publisher American Society for Testing and Materials
    Status Superseded
    Superseded By

    Standards Referenced By This Book - (Show below) - (Hide below)

    ASTM E 1652 : 2015 Standard Specification for Magnesium Oxide and Aluminum Oxide Powder and Crushable Insulators Used in the Manufacture of Base Metal Thermocouples, Metal-Sheathed Platinum Resistance Thermometers, and Noble Metal Thermocouples
    ASTM D 5930 : 2017 Standard Test Method for Thermal Conductivity of Plastics by Means of a Transient Line-Source Technique
    ASTM D 6353 : 2006 : R2017 : EDT 1 Standard Guide for Sampling Plan and Core Sampling for Prebaked Anodes Used in Aluminum Production
    ASTM C 1470 : 2006 : R2013 Standard Guide for Testing the Thermal Properties of Advanced Ceramics
    ASTM D 5470 : 2017 Standard Test Method for Thermal Transmission Properties of Thermally Conductive Electrical Insulation Materials
    ASTM C 1671 : 2015 Standard Practice for Qualification and Acceptance of Boron Based Metallic Neutron Absorbers for Nuclear Criticality Control for Dry Cask Storage Systems and Transportation Packaging
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