ASTM C838-96

Standard Test Method for Bulk Density of As-Manufactured Carbon and Graphite Shapes

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 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

• Status: Historical
• Publication Date: 09-Nov-2001
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants

Relations

• Replaced By: ASTM C838-96(2001) - Standard Test Method for Bulk Density of As-Manufactured Carbon and Graphite Shapes
• Effective Date: 10-Nov-2001

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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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.
Designation: C 838 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Bulk Density of As-Manufactured Carbon and Graphite
1
Shapes
This standard is issued under the fixed designation C 838; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope machining. The stock shall preferably have been indoors after
heat treatment; if there is doubt that the piece is dry, weigh, dry,
1.1 This test method covers the determination of the density
and reweigh it. Repeat, if necessary, until there is less than
of as-manufactured carbon and graphite from measurements of
0.1 % weight loss. The drying temperature should be from 110
mass and dimensions at room temperature.
to 200°C.
1.2 This test method is applicable to boronated carbon and
5.2 Shaped Articles—Other than right circular cylinders or
graphite.
rectangular parallelepipeds may be measured, and a correction
1.3 This test method is not applicable to carbon- and
made for the cavities or protuberances if the specimen volume
graphite-containing materials that are thermally unstable at or
can be determined within 0.5 % (see 6.2).
below temperatures of 200°C.
1.4 This standard does not purport to address all of the
6. Procedure
safety concerns, if any, associated with its use. It is the
6.1 Logs or Blocks—Measure as-manufactured on the di-
responsibility of the user of this standard to establish appro-
ameter or cross section at two different locations, taking care to
priate safety and health practices and determine the applica-
avoid distortions. Take four length measurements on cylinders
bility of regulatory limitations prior to use.
90° apart on the periphery of the circular end faces. On
2. Referenced Documents
rectangular pieces, make four length measurements, two each
along opposite faces. Make additional measurements, if
2.1 ASTM Standards:
needed, to determine a valid mean for each dimension. Make
C 559 Test Method for Bulk Density by Physical Measure-
2
dimensional and mass measurements with equipment accurate
ments of Manufactured Carbon and Graphite Articles
3
to 0.5 %.
3. Terminology
6.2 Shaped Articles—Make dimensional and mass measure-
ments with equipment accurate to 0.5 %.
3.1 Descriptions of Terms Specific to This Standard:
3.1.1 bulk density, n—the mass of a unit volume including
7. Calculation
both permeable and impermeable voids (and boron compounds
in the case of boronated carbon or boronated graphite) present 7.1 Calculate the bulk density as follows:
in the material at room temperature.
M
D 5
V
4. Significance and Use
4.1 This test method provides a means of determining bulk
where:
density on as-manufactured logs, blocks, or shaped articles.
3
4.2 This test method is suitable for manufacturing control
D = density, kg/m ,
and acceptance specifications.
M = mass, kg, and
3
4.3 Test Method C 559 may be used when a higher degree
V = volume, m .
of accuracy is required. 7.2 Calculate to three significant figures.
5. Te
...