ASTM E8-04

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
American Association State
Designation:E8–04 Highway and Transportation Officials Standard
AASHTO No.: T68
An American National Standard
Standard Test Methods for
1
Tension Testing of Metallic Materials
ThisstandardisissuedunderthefixeddesignationE8;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
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* A370 TestMethodsandDefinitionsforMechanicalTesting
of Steel Products
1.1 These test methods cover the tension testing of metallic
B557 Test Methods of Tension Testing Wrought and Cast
materials in any form at room temperature, specifically, the
Aluminum- and Magnesium-Alloy Products
methods of determination of yield strength, yield point elon-
E4 Practices for Force Verification of Testing Machines
gation, tensile strength, elongation, and reduction of area.
E6 Terminology Relating to Methods of Mechanical Test-
NOTE 1—A complete metric companion to Test Methods E8 has been
ing
developed, therefore, no metric equivalents are shown in these test
E8M Test Methods for Tension Testing of Metallic Mate-
methods. Committee E28 was granted an exception in 1997 by the
rials [Metric]
Committee on Standards to maintain E8 and E8M as separate companion
E29 Practice for Using Significant Digits in Test Data to
standards rather than combining standards as recommended by the Form
and Style Manual. Determine Conformance with Specifications
NOTE 2—Gage lengths in these test methods are required to be 4D for
E83 Practice for Verification and Classification of Exten-
most round specimens. Test specimens made from powder metallurgy
someters
(P/M) materials are exempt from this requirement by industry-wide
E208 Test Method for Conducting Drop-Weight Test to
agreement to keep the pressing of the material to a specific projected area
Determine Nil-DuctilityTransitionTemperature of Ferritic
and density.
Steels
NOTE 3—Exceptions to the provisions of these test methods may need
E345 Test Methods of Tension Testing of Metallic Foil
to be made in individual specifications or test methods for a particular
material. For examples, see Test Methods and DefinitionsA370 and Test E691 Practice for Conducting an Interlaboratory Study to
Methods B557.
Determine the Precision of a Test Method
NOTE 4—Room temperature shall be considered to be 50 to 100°F
E1012 Practice for Verification of Specimen Alignment
unless otherwise specified.
Under Tensile Loading
1.2 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 3.1 Definitions—The definitions of terms relating to tension
priate safety and health practices and determine the applica-
testing appearing in Terminology E6 shall be considered as
bility of regulatory limitations prior to use. applying to the terms used in these test methods of tension
testing. Additional terms being defined are as follows:
2. Referenced Documents
3.1.1 discontinuous yielding—in a uniaxial test, a hesitation
2
2.1 ASTM Standards:
or fluctuation of force observed at the onset of plastic defor-
A356/A356M Specification for Steel Castings, Carbon,
mation,duetolocalizedyielding.(Thestress-straincurveneed
Low Alloy, and Stainless Steel, Heavy-Walled for Steam
not appear to be discontinuous.)
−2
Turbines
3.1.2 lower yield strength, LYS [FL ]—in a uniaxial test,
the minimum stress recorded during discontinuous yielding,
ignoring transient effects.
−2
1
These test methods are under the jurisdiction of ASTM Committee E28 on
3.1.3 upper yield strength, UYS [FL ]— in a uniaxial test,
Mechanical Testing and are the direct responsibility of Subcommittee E28.04 on
the first stress maximum (stress at first zero slope) associated
Uniaxial Testing.
with discontinuous yielding at or near the onset of plastic
Current edition approved April 1, 2004. Published May 2004. Originally
deformation.
approved in 1924. Last previous edition appproved 2003 asE8–03.
2
Annual Book of ASTM Standards, Vol 01.02.
3.1.4 yield point elongation, YPE— in a uniaxial test, the
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
strain(expressedinpercent)separatingthestress-straincurve’s
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
first point of zero slope from the point of transition from
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. discontinuous yielding to uniform strain hardening. If the
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM Internat
...