ASTM C838-96(2005)
(Test Method)Standard Test Method for Bulk Density of As-Manufactured Carbon and Graphite Shapes
Standard Test Method for Bulk Density of As-Manufactured Carbon and Graphite Shapes
SIGNIFICANCE AND USE
This test method provides a means of determining bulk density on as-manufactured logs, blocks, or shaped articles.
This test method is suitable for manufacturing control and acceptance specifications.
Test Method C 559 may be used when a higher degree of accuracy is required.
SCOPE
1.1 This test method covers the determination of the density of as-manufactured carbon and graphite from measurements of mass and dimensions at room temperature.
1.2 This test method is applicable to boronated carbon and graphite.
1.3 This test method is not applicable to carbon- and graphite-containing materials that are thermally unstable at or below temperatures of 200°C.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
An American National Standard
Designation:C838–96 (Reapproved 2005)
Standard Test Method for
Bulk Density of As-Manufactured Carbon and Graphite
Shapes
This standard is issued under the fixed designation C838; 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 4.2 This test method is suitable for manufacturing control
and acceptance specifications.
1.1 This test method covers the determination of the density
4.3 Test Method C559 may be used when a higher degree of
of as-manufactured carbon and graphite from measurements of
accuracy is required.
mass and dimensions at room temperature.
1.2 This test method is applicable to boronated carbon and
5. Test Specimens
graphite.
5.1 Logs or Blocks—May be measured and weighed as-
1.3 This test method is not applicable to carbon- and
manufactured or after rough ends have been squared by
graphite-containing materials that are thermally unstable at or
machining. The stock shall preferably have been indoors after
below temperatures of 200°C.
heattreatment;ifthereisdoubtthatthepieceisdry,weigh,dry,
1.4 The values stated in SI units are to be regarded as
and reweigh it. Repeat, if necessary, until there is less than
standard. No other units of measurement are included in this
0.1 % weight loss. The drying temperature should be from 110
standard.
to 200°C.
1.5 This standard does not purport to address all of the
5.2 Shaped Articles—Other than right circular cylinders or
safety concerns, if any, associated with its use. It is the
rectangular parallelepipeds may be measured, and a correction
responsibility of the user of this standard to establish appro-
made for the cavities or protuberances if the specimen volume
priate safety and health practices and determine the applica-
can be determined within 0.5 % (see 6.2).
bility of regulatory limitations prior to use.
6. Procedure
2. Referenced Documents
2 6.1 Logs or Blocks—Measure as-manufactured on the di-
2.1 ASTM Standards:
ameter or cross section at two different locations, taking care to
C559 Test Method for Bulk Density by Physical Measure-
avoid distortions. Take four length measurements on cylinders
ments of Manufactured Carbon and Graphite Articles
90° apart on the periphery of the circular end faces. On
3. Terminology rectangular pieces, make four length measurements, two each
along opposite faces. Make additional measurements, if
3.1 Definitions of Terms Specific to This Standard:
needed, to determine a valid mean for each dimension. Make
3.1.1 bulk density, n—the mass of a unit volume including
dimensional and mass measurements with equipment accurate
both permeable and impermeable voids (and boron compounds
to 0.5 %.
in the case of boronated carbon or boronated graphite) present
6.2 Shaped Articles—Make dimensional and mass measure-
in the material at room temperature.
ments with equipment accurate to 0.5 %.
4. Significance and Use
7. Calculation
4.1 This test method provides a means of determining bulk
7.1 Calculate the bulk density as follows:
density on as-manufactured logs, blocks, or shaped articles.
M
D 5
V
This test method is under the jurisdiction of Committee D02 on Petroleum
Products and Lubricants and is the direct responsibility of Subcommittee D02.F0 on
where:
Manufactured Carbon and Graphite Products.
Current edition approved Nov. 1, 2005. Published November 2005. Originally
D = density, kg/m ,
approved in 1980. Last previous edition approved
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.