ASTM E8-01e1

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American Association State
e1
Designation:E8–01 Highway and Transportation Officials Standard
AASHTO No.: T68
Standard Test Methods for
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Tension Testing of Metallic Materials
This standard is issued under the fixed designation E 8; 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.
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e NOTE—Sections 3.1.5, 7.2.2, 7.9.2, 7.9.3.2 and the caption of Fig. 27 were editorially revised in April 2002.
1. Scope* B 557 Test Methods of Tension Testing Wrought and Cast
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Aluminum- and Magnesium-Alloy Products
1.1 These test methods cover the tension testing of metallic
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E 4 Practices for Force Verification of Testing Machines
materials in any form at room temperature, specifically, the
E 6 Terminology Relating to Methods of Mechanical Test-
methods of determination of yield strength, yield point elon-
5
ing
gation, tensile strength, elongation, and reduction of area.
E 8M Test Methods for Tension Testing of Metallic Mate-
NOTE 1—A complete metric companion to Test Methods E 8 has been 5
rials [Metric]
developed, therefore, no metric equivalents are shown in these test
E 29 Practice for Using Significant Digits in Test Data to
methods. Committee E28 was granted an exception in 1997 by the
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Determine Conformance with Specifications
Committee on Standards to maintain E8 and E8M as separate companion
E 83 Practice for Verification and Classification of Exten-
standards rather than combining standards as recommended by the Form
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and Style Manual. someters
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NOTE 2—Gage lengths in these test methods are required to be 4D for
E 345 Test Methods of Tension Testing of Metallic Foil
most round specimens. Test specimens made from powder metallurgy
E 691 Practice for Conducting an Interlaboratory Study to
(P/M) materials are exempt from this requirement by industry-wide 6
Determine the Precision of a Test Method
agreement to keep the pressing of the material to a specific projected area
E 1012 Practice for Verification of Specimen Alignment
and density.
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Under Tensile Loading
NOTE 3—Exceptions to the provisions of these test methods may need
to be made in individual specifications or test methods for a particular
3. Terminology
material. For examples, see Test Methods and Definitions A 370 and Test
Methods B 557.
3.1 Definitions—The definitions of terms relating to tension
NOTE 4—Room temperature shall be considered to be 50 to 100°F
testing appearing in Terminology E 6 shall be considered as
unless otherwise specified.
applying to the terms used in these test methods of tension
1.2 This standard does not purport to address all of the testing. Additional terms being defined are as follows:
safety concerns, if any, associated with its use. It is the
3.1.1 discontinuous yielding—a hesitation or fluctuation of
responsibility of the user of this standard to establish appro- force observed at the onset of plastic deformation, due to
priate safety and health practices and determine the applica-
localized yielding. (The stress-strain curve need not appear to
bility of regulatory limitations prior to use. be discontinuous.)
−2
3.1.2 lower yield strength, LYS [FL ]—the minimum stress
2. Referenced Documents
recorded during discontinuous yielding, ignoring transient
2.1 ASTM Standards:
effects.
−2
A 356/A 356M Specification for Steel Castings, Carbon,
3.1.3 upper yield strength, UYS [FL ]— the first stress
Low Alloy, and Stainless Steel, Heavy-Walled for Steam
maximum (stress at first zero slope) associated with discon-
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Turbines
tinuous yielding.
A 370 Test Methods and Definitions for Mechanical Testing
3.1.4 yield point elongation, YPE—the strain (expressed in
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of Steel Products
percent) separating the stress-strain curve’s first point of zero
slope from the point of transition from discontinuous yielding
to uniform strain hardening. If the transition occurs over a
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range of strain, the YPE end point is the intersection between
These test methods are under the jurisdiction of ASTM Committee E28 on
Mechanical Testing and are the direct responsibility of Subcommittee E28.04 on
Uniaxial Testing.
Current edition approved Oct. 10, 2001. Published December 2001. Originally
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published as E8–24T. Last previous edition E 8 – 00b. Annual Book of ASTM Standards, Vol 02.02.
2 5
Annual Book of ASTM Standards, Vol 01.02. Annual Book of ASTM Standards, Vol 03.01.
3 6
Annual Book of ASTM Standards, Vol 01.03. Annual Book of ASTM Standards, Vol 14.02.
*A Summary of Changes section appears at the end of this standard.
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