ASTM D618-00
(Practice)Standard Practice for Conditioning Plastics for Testing
Standard Practice for Conditioning Plastics for Testing
SCOPE
1.1 In general, the physical and electrical properties of plastics are influenced by temperature and relative humidity in a manner that materially affects test results. In order that reliable comparisons may be made of different materials and between different laboratories, it is necessary to standardize the humidity conditions, as well as the temperature, to which specimens of these materials are subjected prior to and during testing. This practice defines procedures for conditioning plastics (although not necessarily to equilibrium) prior to testing, and the conditions under which they shall be tested.
1.2 For some materials, there may be a material specification that requires the use of this practice, but with some procedural modifications. The material specification takes precedence over this practice. Refer to the material specification before using this practice. Table 1 in Classification D 4000 lists the ASTM material specifications that currently exist.
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 and health practices and determine the applicability of regulatory limitations prior to use.
Note 1-ISO 291 is related to this practice; however, ISO 291 describes only two temperature and humidity conditions for conditioning or testing, or both.
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Standards Content (Sample)
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Designation:D618–00
Standard Practice for
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Conditioning Plastics for Testing
This standard is issued under the fixed designation D 618; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope * D 5032 Practice for Maintaining Constant Relative Humid-
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ity by Means of Aqueous Glycerin Solutions
1.1 In general, the physical and electrical properties of
E 104 Practice for Maintaining Constant Relative Humidity
plastics are influenced by temperature and relative humidity in
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by Means of Aqueous Solutions
a manner that materially affects test results. In order that
2.2 ISO Standard:
reliable comparisons may be made of different materials and
ISO 291 Plastics—Standard Atmospheres for Conditioning
betweendifferentlaboratories,itisnecessarytostandardizethe
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and Testing
humidity conditions, as well as the temperature, to which
specimens of these materials are subjected prior to and during
3. Terminology
testing. This practice defines procedures for conditioning
3.1 Definitions:
plastics (although not necessarily to equilibrium) prior to
3.1.1 room temperature—a temperature in the range from
testing, and the conditions under which they shall be tested.
20 to 30°C (68 to 85°F).
1.2 For some materials, there may be a material specifica-
3.1.2 standard laboratory atmosphere—an atmosphere hav-
tion that requires the use of this practice, but with some
ing a temperature of 23°C (73.4°F) and a relative humidity of
procedural modifications. The material specification takes
50 % with standard tolerances as specified in 3.2 shall be the
precedence over this practice. Refer to the material specifica-
standard laboratory atmosphere.
tion before using this practice.Table 1 in Classification D 4000
3.1.3 standard laboratory temperature—a temperature of
lists the ASTM material specifications that currently exist.
23°C (73.4°F) with standard tolerance as specified in 3.2 shall
1.3 This standard does not purport to address all of the
be the standard laboratory temperature.
safety concerns, if any, associated with its use. It is the
3.2 Tolerances:
responsibility of the user of this standard to establish appro-
3.3 relative humidity—standard tolerance shall be65%.
priate safety and health practices and determine the applica-
3.3.1 Discussion—Where the closer tolerance 62 % is re-
bility of regulatory limitations prior to use.
quired, it may be specified and the tolerance used reported.
NOTE 1—ISO 291 is related to this practice; however, ISO 291
3.4 standard test temperatures other than standard labora-
describes only two temperature and humidity conditions for conditioning
tory temperature—when data are to be obtained for compari-
or testing, or both.
son purposes at a specific temperature either above or below
the standard laboratory temperature, the temperature should be
2. Referenced Documents
selected from the following:
2.1 ASTM Standards:
Test Tolerance,
D 709 Specification for Laminated Thermosetting Materi-
Temperatures, °C (°F) plus or minus, °C (°F)
2
als
−70 (−94) 2.0 (3.6)
−55 (−67) 2.0 (3.6)
D 756 Practice for Determination of Weight and Shape
−40 (−40) 2.0 (3.6)
Changes of Plastics Under Accelerated Service Condi-
−25 (−13) 2.0 (3.6)
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tions
0 (32) 2.0 (3.6)
35 (95) 1.0 (1.8)
D 4000 Classification System for Specifying Plastic Mate-
4 50 (122) 2.0 (3.6)
rials
70 (158) 2.0 (3.6)
90 (194) 2.0 (3.6)
105 (221) 2.0 (3.6)
120 (248) 2.0 (3.6)
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This practice is under the jurisdiction ofASTM Committee D20 on Plastics and
is the direct responsibility of Subcommittee D20.50 on Permanence Properties.
Current edition approved Nov. 10, 2000. Published January 2001. Originally
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published as D 618 – 41. Last previous edition D 618 – 99. Annual Book of ASTM Standards, Vol 10.02.
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Annual Book of ASTM Standards, Vol 10.01. Annual Book of ASTM Standards, Vol 11.03.
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Annual Book of ASTM Standards, Vol 08.01. Available from American National Standards Institute, 11 W. 42nd St., 13th
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Annual Book of ASTM Standards, Vol 08.02. Floor, New York, NY 10036.
*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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D618
7.1.1 Conditioning of test specimens may be designated as
Test Tolerance,
Temperatures, °C (°F) plus or minus, °C (°F)
follows:
130 (266) 2.0 (3.6)
7.1.1.1 A number indicating in hours the duration of the
155 (311) 2.0 (3.6)
conditioning,
180 (356) 2.0 (3.6)
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...
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