ASTM E8-00b
(Test Method)Standard Test Methods for Tension Testing of Metallic Materials
Standard Test Methods for Tension Testing of Metallic Materials
SCOPE
1.1 These test methods cover the tension testing of metallic materials in any form at room temperature, specifically, the methods of determination of yield strength, yield point elongation, tensile strength, elongation, and reduction of area.
Note 1—A complete metric companion to Test Methods E 8 has been developed, therefore, no metric equivalents are shown in these test methods. Committee E28 was granted an exception in 1997 by the Committee on Standards to maintain E8 and E8M as separate companion standards rather than combining standards as recommended by the Form and Style Manual.
Note 2—Gage lengths in these test methods are required to be 4D for most round specimens. Test specimens made from powder metallurgy (P/M) materials are exempt from this requirement by industry-wide agreement to keep the pressing of the material to a specific projected area and density.
Note 3—Exceptions to the provisions of these test methods may need to be made in individual specifications or test methods for a particular material. For examples, see Test Methods and Definitions A 370 and Test Methods B 557.
Note 4—Room temperature shall be considered to be 50 to 100°F unless otherwise specified.
1.2 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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Designation:E8–00b American Association State
Highway and Transportation Officials Standard
AASHTO No.: T68
An American National Standard
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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1. Scope * Aluminum- and Magnesium-Alloy Products
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E 4 Practices for Force Verification of Testing Machines
1.1 These test methods cover the tension testing of metallic
E 6 Terminology Relating to Methods of Mechanical Test-
materials in any form at room temperature, specifically, the
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ing
methods of determination of yield strength, yield point elon-
E 8M Test Methods for Tension Testing of Metallic Mate-
gation, tensile strength, elongation, and reduction of area.
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rials [Metric]
NOTE 1—A complete metric companion to Test Methods E 8 has been
E 29 Practice for Using Significant Digits in Test Data to
developed—; therefore, no metric equivalents are shown in these test
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Determine Conformance with Specifications
methods. Committee E28 was granted an exception in 1997 by the
E 83 Practice for Verification and Classification of Exten-
Committee on Standards to maintain E8 and E8M as separate companion
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someters
standards rather than combining standards as recommended by the Form
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and Style Manual. E 345 Test Methods of Tension Testing of Metallic Foil
NOTE 2—Gage lengths in these test methods are required to be 4D for
E 691 Practice for Conducting an Interlaboratory Study to
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most round specimens. Test specimens made from powder metallurgy
Determine the Precision of a Test Method
(P/M) materials are exempt from this requirement by industry-wide
E 1012 Practice for Verification of Specimen Alignment
agreement to keep the pressing of the material to a specific projected area
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Under Tensile Loading
and density.
NOTE 3—Exceptions to the provisions of these test methods may need
3. Terminology
to be made in individual specifications or test methods for a particular
material. For examples, see Test Methods and Definitions A 370 and Test 3.1 Definitions—The definitions of terms relating to tension
Methods B 557.
testing appearing in Terminology E 6 shall be considered as
NOTE 4—Room temperature shall be considered to be 50 to 100°F
applying to the terms used in these test methods of tension
unless otherwise specified.
testing. Additional terms being defined are as follows:
1.2 This standard does not purport to address all of the
3.1.1 discontinuous yielding—a hesitation or fluctuation of
safety concerns, if any, associated with its use. It is the force observed at the onset of plastic deformation, due to
responsibility of the user of this standard to establish appro-
localized yielding. (The stress-strain curve need not appear to
priate safety and health practices and determine the applica- be discontinuous.)
−2
bility of regulatory limitations prior to use.
3.1.2 lower yield strength, LYS [FL ]—the minimum stress
recorded during discontinuous yielding, ignoring transient
2. Referenced Documents
effects.
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2.1 ASTM Standards:
3.1.3 upper yield strength, UYS [FL ]— the first stress
A 356/A 356M Specification for Steel Castings, Carbon,
maximum (stress at first zero slope) associated with discon-
Low Alloy, and Stainless Steel, Heavy-Walled for Steam
tinuous yielding.
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Turbines
3.1.4 yield point elongation, YPE—the strain (expressed in
A 370 Test Methods and Definitions for Mechanical Testing
percent) separating the stress-strain curve’s first point of zero
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of Steel Products
slope from the point of transition from discontinuous yielding
B 557 Test Methods of Tension Testing Wrought and Cast
to uniform strain hardening. If the transition occurs over a
range of strain, the YPE end point is the intersection between
(a) a horizontal line drawn tangent to the curve at the last zero
slope and ( b) a line drawn tangent to the strain hardening
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These test methods are under the jurisdiction of ASTM Committee E28 on
portion of the stress-strain curve at the point of inflection. If
Mechanical Testing and are the direct responsibility of Subcommittee E28.04 on
Uniaxial Testing.
Current edition approved Dec. 10, 2000. Published February 2001. Originally
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published as E8–24T. Last previous edition E 8 – 00a.
Annual Book of ASTM Standards, Vol 02.02.
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Annual Book of ASTM Standards, Vol 01.02.
Annual Book of ASTM Standards, Vol 03.01.
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Annual Book of ASTM Standards, Vol 01.03.
Annual Book of ASTM Standards, Vol 14.02.
*A Summary of Chang
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