ASTM D2319/D2319M-20
(Test Method)Standard Test Method for Softening Point of Pitch (Cube-in-Air Method)
Standard Test Method for Softening Point of Pitch (Cube-in-Air Method)
SIGNIFICANCE AND USE
4.1 Pitch does not go through a solid-liquid phase change when heated and therefore does not have a true melting point. As the temperature is raised, pitch softens and becomes less viscous. The softening point is arbitrarily defined and must be determined by a closely controlled method that must be carefully followed if test results are to be reproducible.
4.2 This test method is useful in determining the consistency of pitch as one element in establishing the uniformity of shipments and sources of supply.
SCOPE
1.1 This test method covers the determination of the softening point above 80 °C [176 °F] of pitch. Test Method D3104 gives comparable results.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the 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.
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
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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: D2319/D2319M − 20
Standard Test Method for
1
Softening Point of Pitch (Cube-in-Air Method)
This standard is issued under the fixed designation D2319/D2319M; 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* is the mean of the temperatures at which the cubes sag
downwards a distance of 60 mm [2.4 in.].
1.1 This test method covers the determination of the soft-
ening point above 80 °C [176 °F] of pitch. Test Method D3104
4. Significance and Use
gives comparable results.
4.1 Pitch does not go through a solid-liquid phase change
1.2 The values stated in either SI units or inch-pound units
when heated and therefore does not have a true melting point.
are to be regarded separately as standard. The values stated in
As the temperature is raised, pitch softens and becomes less
each system may not be exact equivalents; therefore, each
viscous. The softening point is arbitrarily defined and must be
system shall be used independently of the other. Combining
determined by a closely controlled method that must be
values from the two systems may result in non-conformance
carefully followed if test results are to be reproducible.
with the standard.
4.2 This test method is useful in determining the consis-
1.3 This standard does not purport to address all of the
tency of pitch as one element in establishing the uniformity of
safety concerns, if any, associated with its use. It is the
shipments and sources of supply.
responsibility of the user of this standard to establish appro-
3
5. Apparatus
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
5.1 AirOven—The oven shall be cylindrical, 150 mm [6 in.]
1.4 This international standard was developed in accor-
in inside diameter by 155 mm [6.2 in.] in height. It shall have
dance with internationally recognized principles on standard-
two 75 mm [3 in.] diameter windows of mica, centered
ization established in the Decision on Principles for the
vertically on opposite sides, and shall be fitted with a cover
Development of International Standards, Guides and Recom-
having a central opening 25 mm [1 in.] in diameter to hold a
mendations issued by the World Trade Organization Technical
thermometer,andaconcentricringsuspendedbelowtosupport
Barriers to Trade (TBT) Committee.
the hooks with attached specimens. The ring shall be made of
6 mm [0.25 in.] brass, shall be 54 mm [2.125 in.] in outside
2. Referenced Documents
diameter, and shall be centrally suspended 30 mm [1.2 in.]
2
2.1 ASTM Standards:
below the cover. The cover shall have two 3 mm [0.12 in.]
D61 Test Method for Softening Point of Pitches (Cube-in-
holes on a diagonal 50 mm [2 in.] from the center. On the
Water Method)
bottom of the oven, an inner pan 140 mm [5.6 in.] in diameter
D3104 Test Method for Softening Point of Pitches (Mettler
shall rest on three brass legs 5 mm [0.2 in.] in height fastened
Softening Point Method)
to the bottom of the pan to provide an air space between the
D4296 Practice for Sampling Pitch
pan and the bottom of the oven. The side wall, cover, and pan
E1 Specification for ASTM Liquid-in-Glass Thermometers
shall be made of 0.7 mm [0.028 in.] thick or 22 gauge (BWG)
copper sheet, and the bottom of 0.8 mm [0.032 in.] thick or
3. Summary of Test Method
21 gauge copper.
3.1 Two cubes of pitch, supported on wire hooks, are heated
5.2 Tripod for Use with Gas Burner—The tripod ring shall
in a standardized air oven at a linear rate. The softening point
be approximately 125 mm [5 in.] in inside diameter so that the
oven is supported only on its outer edges. It shall be 200 mm
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This test method is under the jurisdiction of ASTM Committee D02 on
[8 in.] in height.
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.05 on Properties of Fuels, Petroleum Coke and Carbon Material.
3
Current edition approved June 1, 2020. Published June 2020. Originally The sole source of supply of the softening point apparatus items, obtainable as
approved in 1964. Last previous edition approved in 2014 as D2319/D2319M a unit on special order, known to the committee at this time is Humboldt
ɛ1
–14 . DOI: 10.1520/D2319_D2319M-20. Manufacturing Co., 7302 W. Agatite Ave., Chicago, IL 60656. If you are aware of
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or alternative suppliers, please provide this inform
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: D2319/D2319M − 14 D2319/D2319M − 20
Standard Test Method for
1
Softening Point of Pitch (Cube-in-Air Method)
This standard is issued under the fixed designation D2319/D2319M; 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
ε NOTE—Editorial changes were made throughout the test method in September 2014.
1. Scope*
1.1 This test method covers the determination of the softening point above 80 °C [176 °F] of pitch. Test Method D3104 gives
comparable results.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D61 Test Method for Softening Point of Pitches (Cube-in-Water Method)
D3104 Test Method for Softening Point of Pitches (Mettler Softening Point Method)
D4296 Practice for Sampling Pitch
E1 Specification for ASTM Liquid-in-Glass Thermometers
3. Summary of Test Method
3.1 Two cubes of pitch, supported on wire hooks, are heated in a standardized air oven at a linear rate. The softening point is
the mean of the temperatures at which the cubes sag downwards a distance of 60 mm [2.4 in.].
4. Significance and Use
4.1 Pitch does not go through a solid-liquid phase change when heated and therefore does not have a true melting point. As the
temperature is raised, pitch softens and becomes less viscous. The softening point is arbitrarily defined and must be determined
by a closely controlled method that must be carefully followed if test results are to be reproducible.
4.2 This test method is useful in determining the consistency of pitch as one element in establishing the uniformity of shipments
and sources of supply.
3
5. Apparatus
5.1 Air Oven—The oven shall be cylindrical, 150 mm [6 in.] in inside diameter by 155 mm [6.2 in.] in height. It shall have two
75 mm [3 in.] diameter windows of mica, centered vertically on opposite sides, and shall be fitted with a cover having a central
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.05 on Properties of Fuels, Petroleum Coke and Carbon Material.
Current edition approved May 1, 2014June 1, 2020. Published May 2014June 2020. Originally approved in 1964. Last previous edition approved in 20132014 as
ɛ1
D2319/D2319M – 98 (2013).– 14 . DOI: 10.1520/D2319_D2319M-14E01.10.1520/D2319_D2319M-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The sole source of supply of the softening point apparatus items, obtainable as a unit on special order, known to the committee at this time is Humboldt Manufacturing
Co., 7302 W. Agatite Ave., Chicago, IL 60656. If you are aware of alternative suppliers, please provide this information to ASTM International Headquarters. Your comments
1
will receive careful consideration at a meeting of the responsible technical committee, which you may attend. All other apparatus items described may be obtained from any
regular laboratory equipment supply house.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D2319/D23
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