Standard Test Method for
Microscopical Determination of Volume Percent of Textural
Components in Metallurgical Coke1
This standard is issued under the fixed designation D 5061; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of the last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the equipment and procedures
used for determining the types and amounts of coke carbon
forms and associated recognizable coal- and process-derived
textural components in metallurgical coke in terms of volume
percent. This test method does not include coke’s structural
components such as coke pores, coke wall dimensions, or other
structural associations.
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.
2. Referenced Documents
2.1 ASTM Standards:
D 121 Terminology of Coal and Coke2
D 346 Practice for Collection and Preparation of Coke
Samples for Laboratory Analyses2
D 3997 Practice for Preparing Coke Samples for Microscopical Analysis by Reflected Light2
3. Terminology
3.1 Definitions—For additional definitions of terms used in
this test method, refer to Terminology D 121.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 anisotropic, adj—exhibiting optical properties of different values when viewed with an optical microscope having
mutually exclusive polarized light, for example, crossed Nicols.
3.2.2 binder phase, n—a continuous solid carbon matrix
formed during the thermoplastic deformation of those coal
macerals that become plastic during carbonization.
3.2.2.1 Discussion—The binder phase material is formed
from the thermoplastic deformation of reactive (vitrinite and
liptinite) and semi-inert (semifusinite) coal macerals of metallurgical bituminous coals. During thermoplasticity, the inert
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