ASTM C783-85(2020)
(Practice)Standard Practice for Core Sampling of Graphite Electrodes
Standard Practice for Core Sampling of Graphite Electrodes
SIGNIFICANCE AND USE
4.1 Core sampling is an acceptable way of obtaining a test specimen without destroying the usefulness of the electrode.
4.1.1 Test specimens obtained by this practice can be used by producers and users of graphite electrodes for the purpose of conducting the tests in Note 1 to obtain comparative physical properties.
4.2 This practice may not provide a test specimen of the appropriate size (with respect to particle size/sample dimension ratios) to allow the determination of absolute property values.
SCOPE
1.1 This practice was developed for electric-arc furnace graphite electrodes, and covers a procedure and equipment for obtaining core samples from electrodes in a manner that does not destroy the electrode nor prevent its subsequent use as originally intended. However, the minimum electrode diameter, for which extraction of a core sample using this practice does not influence subsequent use, is influenced by the particular application and must be determined by the user. Graphite electrodes for use in electric arc furnaces are usually solid cylinders of graphite with threaded sockets machined in each end.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: The following ASTM standards are noted as sources of useful information: Test Methods C559, C611, C651, C747, C1025, and C1039.
1.4 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.
General Information
Relations
Standards Content (Sample)
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.
Designation: C783 − 85 (Reapproved 2020)
Standard Practice for
Core Sampling of Graphite Electrodes
This standard is issued under the fixed designation C783; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope C611 TestMethodforElectricalResistivityofManufactured
Carbon and Graphite Articles at Room Temperature
1.1 This practice was developed for electric-arc furnace
C651 Test Method for Flexural Strength of Manufactured
graphite electrodes, and covers a procedure and equipment for
CarbonandGraphiteArticlesUsingFour-PointLoadingat
obtaining core samples from electrodes in a manner that does
Room Temperature
not destroy the electrode nor prevent its subsequent use as
C747 Test Method for Moduli of Elasticity and Fundamental
originally intended. However, the minimum electrode
Frequencies of Carbon and Graphite Materials by Sonic
diameter, for which extraction of a core sample using this
Resonance
practice does not influence subsequent use, is influenced by the
C1025 Test Method for Modulus of Rupture in Bending of
particular application and must be determined by the user.
Electrode Graphite
Graphite electrodes for use in electric arc furnaces are usually
C1039 Test Methods for Apparent Porosity, Apparent Spe-
solid cylinders of graphite with threaded sockets machined in
cific Gravity, and Bulk Density of Graphite Electrodes
each end.
1.2 The values stated in SI units are to be regarded as
3. Terminology
standard. No other units of measurement are included in this
3.1 Definitions:
standard.
3.1.1 core sample, n—the portion of graphite obtained from
1.3 This standard does not purport to address all of the
an electrode by use of a sampling device such as described in
safety concerns, if any, associated with its use. It is the
4.1.
responsibility of the user of this standard to establish appro-
3.1.2 test specimen, n—an article prepared from a core
priate safety, health, and environmental practices and deter-
sample.
mine the applicability of regulatory limitations prior to use.
NOTE 1—The followingASTM standards are noted as sources of useful
4. Significance and Use
information: Test Methods C559, C611, C651, C747, C1025, and C1039.
4.1 Core sampling is an acceptable way of obtaining a test
1.4 This international standard was developed in accor-
specimen without destroying the usefulness of the electrode.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 4.1.1 Test specimens obtained by this practice can be used
Development of International Standards, Guides and Recom- byproducersandusersofgraphiteelectrodesforthepurposeof
mendations issued by the World Trade Organization Technical conducting the tests in Note 1 to obtain comparative physical
Barriers to Trade (TBT) Committee. properties.
4.2 This practice may not provide a test specimen of the
2. Referenced Documents
appropriatesize(withrespecttoparticlesize/sampledimension
2.1 ASTM Standards:
ratios) to allow the d
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