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ASTM E 1225 : 2004

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Test Method for Thermal Conductivity of Solids by Means of the Guarded-Comparative-Longitudinal Heat Flow Technique
Available format(s)

Hardcopy , PDF

Superseded date

11-11-2014

Language(s)

English

Published date

01-05-2004

1.1 This test method describes a steady state technique for the determination of the thermal conductivity, , of homogeneous-opaque solids (see Note 1 and Note 2). This test method is for materials with effective thermal conductivities in the approximate range 0.2 200 W/(mK) over the approximate temperature range between 90 and 1300 K. It can be used outside these ranges with decreased accuracy. Note 0For purposes of this technique, a system is homogeneous if the apparent thermal conductivity of the specimen, A, 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 A 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 thermal conductivity, A.

Note 2

This test method may also be used to evaluate the contact thermal conductance/resistance of materials.

1.2 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.

Committee
E 37
DocumentType
Test Method
Pages
8
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

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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