Standard Test Method for Tensile Properties of Plastics By Use of Microtensile Specimens

SCOPE
1.1 This test method covers certain material specifications for which a history of data has been obtained using the standard microtensile specimen. The specimen geometry has been changed to be equivalent to that of ISO 12086-2:1955. In general, this test method is superseded for general use by either Test Methods D 882 or Test Method D 638. The very small Type V specimen in Test Method D 638 is the recommended specimen when limited amounts of material are available.
1.2 This test method covers the determination of the comparative tensile strength and elongation properties of plastics in the form of standard microtensile test specimens when tested under defined conditions of pretreatment, temperature, humidity, and testing machine speed. It can be used for specimens of any thickness up to 3.2 mm (1/8 in.), including thin films.
1.3 This test method cannot be used for the determination of modulus of elasticity. For the determination of modulus, see Test Method D 638 or Test Methods D 882.
1.4 Test data obtained by this test method are relevant and appropriate for use in engineering design.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 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—There is no equivalent or similar ISO standard.

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Publication Date
09-Apr-2002
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ASTM D1708-02 - Standard Test Method for Tensile Properties of Plastics By Use of Microtensile Specimens
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Standards Content (Sample)

Designation: D 1708 – 02
Standard Test Method for
Tensile Properties of Plastics By Use of Microtensile
1
Specimens
This standard is issued under the fixed designation D 1708; 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.
2
1. Scope D 883 Terminology Relating to Plastics
D 4000 Classification System for Specifying Plastic Mate-
1.1 This test method covers certain material specifications
3
rials
for which a history of data has been obtained using the standard
D 4066 Specification for Nylon Injection and Extrusion
microtensile specimen. The specimen geometry has been
3
Materials
changed to be equivalent to that of ISO 12086-2:1955. In
E 691 Practice for Conducting an Interlaboratory Study to
general, this test method is superseded for general use by either
4
Determine the Precision of a Test Method
Test Methods D 882 or Test Method D 638. The very small
2.2 ISO Standard:
Type V specimen in Test Method D 638 is the recommended
ISO 12086-2:1995 Plastics—Fluoropolymer Dispersion,
specimen when limited amounts of material are available.
Moulding, and Extrusion Materials—Part 2 Preparation of
1.2 This test method covers the determination of the com-
5
Test Specimens and Determination of Properties
parative tensile strength and elongation properties of plastics in
the form of standard microtensile test specimens when tested
3. Terminology
under defined conditions of pretreatment, temperature, humid-
3.1 Definitions: Definitions of terms applying to this test
ity, and testing machine speed. It can be used for specimens of
method appear in Terminology D 883 and Test Method D 638,
1
any thickness up to 3.2 mm ( ⁄8 in.), including thin films.
Annex A2.
1.3 This test method cannot be used for the determination of
modulus of elasticity. For the determination of modulus, see
4. Significance and Use
Test Method D 638 or Test Methods D 882.
4.1 This test method provides data for quality control and
1.4 Test data obtained by this test method are relevant and
acceptance or rejection under specifications.
appropriate for use in engineering design.
4.2 For many materials, there may be a specification that
1.5 The values stated in SI units are to be regarded as the
requires the use of this test method, but with some procedural
standard. The values given in parentheses are for information
modifications that take precedence when adhering to the
only.
specification. Therefore, it is advisable to refer to that material
1.6 This standard does not purport to address all of the
specification before using this test method. Table 1 of Classi-
safety concerns, if any, associated with its use. It is the
fication System D 4000 lists the ASTM materials standards that
responsibility of the user of this standard to establish appro-
currently exist.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Apparatus
NOTE 1—There is no equivalent or similar ISO standard.
5.1 The apparatus shall be as specified in Test Method
D 638, with the following exceptions:
2. Referenced Documents
5.1.1 Grips—Serrated grips should be used with care, since
2.1 ASTM Standards:
yielding or tearing at the grips may interfere with measurement
2
D 618 Practice for Conditioning Plastics for Testing
of elongation even when the specimen breaks in the reduced
2
D 638 Test Method for Tensile Properties of Plastics
section. Rubber-faced grips are recommended for thin speci-
D 882 Test Methods for Tensile Properties of Thin Plastic
mens. Self-tightening grips of the “V”-design type are not
2
Sheeting
satisfactory for this test method because of the change in grip
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics
3
and is the direct responsibility of Subcommittee D20.10 on Mechanical Properties. Annual Book of ASTM Standards, Vol 08.02.
4
Current edition approved April 10, 2002. Published June 2002. Originally Annual Book of ASTM Standards, Vol 14.02.
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published as D 1708 – 59 T. Last previous edition D 1708 – 96. Available from American National Standards Institute, 25 W. 43rd St., 4th
2
Annual Book of ASTM Standards, Vol 08.01. Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D 1708
TABLE 1 Tensile Strength at Break for Seven Laboratories and
NOTE 4—Tabs shown in Fig. 1 are minimum size for adequate gripping.
Two Materials, MPa
Shims may be required with thicker specimens to keep grips from
cocking. Handling is facilitated and gripping improved by the use of larger
Test
A B C D
Material Speed, Average S S r R tabs wh
...

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