ASTM F1473-01
(Test Method)Standard Test Method for Notch Tensile Test to Measure the Resistance to Slow Crack Growth of Polyethylene Pipes and Resins
Standard Test Method for Notch Tensile Test to Measure the Resistance to Slow Crack Growth of Polyethylene Pipes and Resins
SCOPE
1.1 This test method determines the resistance of polyethylene materials to slow crack growth under conditions specified within.
1.2 The test is generally performed at 80oC and at 2.4 MPa, but may also be done at temperatures below 80oC and with other stresses low enough to preclude ductile failure and thereby eventually induce brittle type of failure. Generally, polyethylenes will ultimately fail in a brittle manner by slow crack growth at 80oC if the stress is below 2.4 MPa.
1.3 The test method is for specimens cut from compression molded plaques. See Appendix X1 for information relating to specimens from pipe.
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.
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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.
An American National Standard
Designation:F 1473–01
Standard Test Method for
Notch Tensile Test to Measure the Resistance to Slow Crack
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Growth of Polyethylene Pipes and Resins
This standard is issued under the fixed designation F 1473; 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 3. Terminology
1.1 This test method determines the resistance of polyeth- 3.1 Definitions:
ylene materials to slow crack growth under conditions speci- 3.1.1 DefinitionsareinaccordancewithTerminologyF 412.
fied within. Abbreviations are in accordance with Terminology D 1600,
1.2 The test is generally performed at 80°C and at 2.4 MPa, unless otherwise indicated.
but may also be done at temperatures below 80°C and with 3.1.2 brittle failure—a pipe failure mode which exhibits no
other stresses low enough to preclude ductile failure and visible (to the naked eye) permanent material deformation
thereby eventually induce brittle type of failure. Generally, (stretching, elongation, or necking down) in the area of the
polyethylenes will ultimately fail in a brittle manner by slow break (F 412).
crack growth at 80°C if the stress is below 2.4 MPa. 3.2 Definitions of Terms Specific to This Standard:
1.3 The test method is for specimens cut from compression 3.2.1 slow crack growth—the slow extension of the crack
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molded plaques. SeeAppendix X1 for information relating to with time.
specimens from pipe.
4. Summary of Test Method
1.4 This standard does not purport to address all of the
4.1 Specimens are cut from compression molded plaques. It
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- is precisely notched and then exposed to a constant tensile
stress at elevated temperatures in air. The time for complete
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. failure is recorded.
5. Significance and Use
2. Referenced Documents
5.1 This test method is useful to measure the slow crack
2.1 ASTM Standards:
D 618 Practice for Conditioning Plastics and Electrical growth resistance of molded plaques of polyethylene materials
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at accelerated conditions such as 80°C, 2.4-MPa stress, and
Insulating Materials for Testing
D 1600 Terminology for Abbreviated Terms Relating to with a sharp notch.
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5.2 The time to failure depends on the following test
Plastics
D 1928 Practice for Preparation of Compression-Molded parameters: temperature; stress; notch depth; and specimen
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geometry. Increasing temperature, stress, and notch depth
Polyethylene Test Sheets and Test Specimens
D 3350 Specification for Polyethylene Plastics Pipe and decrease the time to failure. Thus, in reporting the time to
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failure, all the conditions of the test must be specified.
Fittings Materials
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F 412 Terminology Relating to Plastic Piping Systems
6. Apparatus
6.1 Lever Loading Machine, with a lever arm ratio of about
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This test method is under the jurisdiction of ASTM Committee F17 on Plastic
5:1. The tensile load may also be applied directly using dead
Piping Systems and is the direct responsibility of Subcommittee F17.40 on Test
weightsoranyothermethodforproducingaconstantload.The
Methods.
pull rods on the grips shall have universal action to prevent
Current edition approved May 10, 2001. Published July 2001. Originally
e1
bending. The grips shall be serrated to prevent slippage. The
published as F 1473 – 97 .
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Lu, X., and Brown, N., “ATest for Slow Crack Growth Failure in Polyethylene
load on the specimen shall be accurate to at least 60.5 %.
Under a Constant Load,” Journal of Polymer Testing, Vol 11, pp. 309–319, 1992.
6.2 Furnace, heated by ordinary incandescent light bulbs
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Annual Book of ASTM Standards, Vol 08.01.
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covered with aluminum foil or any other suitable heating
Annual Book of ASTM Standards, Vol 08.02.
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Annual Book of ASTM Standards, Vol 08.04. element.
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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.
F 1473
6.3 Temperature Controller, shall be able to control the
temperature within 60.5°C with respect to the set point.
6.4 Temperature-Measuring Device, a thermometer or a
thermocouple which can measure the temperature with an
accuracy better than 0.5°C.
6.5 Timer, shall have an accuracy of at least 1 % and shall
automatically s
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