ASTM D648-06
(Test Method)Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
SCOPE
1.1 This test method covers the determination of the temperature at which an arbitrary deformation occurs when specimens are subjected to an arbitrary set of testing conditions.
1.2 This test method applies to molded and sheet materials available in thicknesses of 3 mm [1/8 in.] or greater and which are rigid or semirigid at normal temperature.Note 1
Sheet stock less than 3 mm [0.125 in.] but more than 1 mm [0.040 in.] in thickness may be tested by use of a composite sample having a minimum thickness of 3 mm. The laminae must be of uniform stress distribution. One type of composite specimen has been prepared by cementing the ends of the laminae together and then smoothing the edges with sandpaper. The direction of loading shall be perpendicular to the edges of the individual laminae.
1.3 The values stated in SI units are to be regarded as standard. The values given in brackets 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.Note 2
The test method described as a Method B of this test method, and test methods Ae and Be of ISO 75-1 and ISO 75-2, 1993, are technically equivalent.
1.4 This procedure covers an alternate technique for measuring the net force that is applied to a deflection temperature specimen at midspan.
1.5 The net force is measured with the specimen support unit and loading assembly in place, that is, immersed in the heat-transfer medium.
1.6 This technique permits the user to account for discrepancies in the actual load applied to the specimen as a result of spring forces, friction, buoyancy, etc.
General Information
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D 648 – 06
Standard Test Method for
Deflection Temperature of Plastics Under Flexural Load in
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the Edgewise Position
This standard is issued under the fixed designation D 648; 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* E1 Specification forASTM Liquid-in-Glass Thermometers
E77 Test Method for Inspection and Verification of Ther-
1.1 This test method covers the determination of the tem-
mometers
perature at which an arbitrary deformation occurs when speci-
E 608/E 608M Specification for Mineral-Insulated, Metal-
mens are subjected to an arbitrary set of testing conditions.
Sheathed Base Metal Thermocouples
1.2 This test method applies to molded and sheet materials
1 E 691 Practice for Conducting an Interlaboratory Study to
available in thicknesses of 3 mm [ ⁄8 in.] or greater and which
Determine the Precision of a Test Method
are rigid or semirigid at normal temperature.
E 1137/E 1137M Specification for Industrial Platinum Re-
NOTE 1—Sheet stock less than 3 mm [0.125 in.] but more than 1 mm
sistance Thermometers
[0.040in.]inthicknessmaybetestedbyuseofacompositesamplehaving
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2.2 ISO Standards:
a minimum thickness of 3 mm. The laminae must be of uniform stress
ISO 75-1 Plastics—Determination of Temperature of De-
distribution. One type of composite specimen has been prepared by
flection Under Load—Part 1: General Test Method
cementing the ends of the laminae together and then smoothing the edges
with sandpaper. The direction of loading shall be perpendicular to the ISO 75-2 Plastics—Determination of Temperature of De-
edges of the individual laminae.
flection Under Load—Part 2: Plastics and Ebonite
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2.3 NIST Document:
1.3 The values stated in SI units are to be regarded as
NBS Special Publication 250-22
standard.Thevaluesgiveninbracketsareforinformationonly.
1.4 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 General—The definitions of plastics used in this test
responsibility of the user of this standard to establish appro-
method are in accordance with Terminology D 883 unless
priate safety and health practices and determine the applica-
otherwise indicated.
bility of regulatory limitations prior to use.
NOTE 2—The test method described as a Method B of this test method, 4. Summary of Test Method
and test methods Ae and Be of ISO 75-1 and ISO 75-2, 1993, are
4.1 A bar of rectangular cross section is tested in the
technically equivalent.
edgewise position as a simple beam with the load applied at its
center to give maximum fiber stresses of 0.455 MPa [66 psi] or
2. Referenced Documents
2 1.82 MPa [264 psi] (Note 3). The specimen is immersed under
2.1 ASTM Standards:
load in a heat-transfer medium provided with a means of
D 618 Practice for Conditioning Plastics for Testing
raising the temperature at 2 6 0.2°C/min. The temperature of
D 883 Terminology Relating to Plastics
the medium is measured when the test bar has deflected 0.25
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D 1898 Practice for Sampling of Plastics
mm [0.010 in.]. This temperature is recorded as the deflection
D 5947 Test Methods for Physical Dimensions of Solid
temperature under flexural load of the test specimen.
Plastics Specimens
NOTE 3—Aroundrobinhasbeenconductedthatshowedthatthereisno
advantagetousinghigherloadswhenmeasuringdeflectiontemperatureof
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This test method is under the jurisdiction ofASTM Committee D20 on Plastics
present-day plastics with present-day instruments.
and is the direct responsibility of Subcommittee D20.30 on Thermal Properties
(Section D20.30.07).
Current edition approved March 15, 2006. Published April 2006. Originally
approved in 1941. Last previous edition approved in 2004 as D 648 - 04.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 4th Floor, New York, NY 10036.
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Standards volume information, refer to the standard’s Document Summary page on Mangum, B.W., “Platinum ResistanceThermometer Calibration,” NBS Special
the ASTM website. Publication 250-22, 1987. Available from National Institute of Standards and
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Withdrawn. Technology, Gaithersburg, MD.
*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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