ASTM E6-07a
(Terminology)Standard Terminology Relating to Methods of Mechanical Testing
Standard Terminology Relating to Methods of Mechanical Testing
SCOPE
1.1 This terminology covers the principal terms relating to methods of mechanical testing of solids. The general definitions are restricted and interpreted, when necessary, to make them particularly applicable and practicable for use in standards requiring or relating to mechanical tests. These definitions are published to encourage uniformity of terminology in product specifications.
1.2 Terms relating to fatigue and fracture testing are defined in Terminology E 1823.
General Information
Relations
Standards Content (Sample)
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Designation:E6–07a
Standard Terminology Relating to
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Methods of Mechanical Testing
ThisstandardisissuedunderthefixeddesignationE6;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
bearing stress F
bearing yield strength F
1.1 This terminology covers the principal terms relating to
bend test D
methods of mechanical testing of solids. The general defini-
bending strain see strain
bias, statistical G
tions are restricted and interpreted, when necessary, to make
biaxial stretching D
them particularly applicable and practicable for use in stan-
breaking load B
dards requiring or relating to mechanical tests. These defini-
Brinell hardness number C
Brinell hardness test C
tions are published to encourage uniformity of terminology in
calibration G
product specifications.
calibration factor G
1.2 Termsrelatingtofatigueandfracturetestingaredefined chord modulus see modulus of elasticity
compressive strength B
in Terminology E1823.
compressive stress see stress
compressometer G
2. Referenced Documents
constraint A
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creep E
2.1 ASTM Standards:
creep recovery E
E8 Test Methods for Tension Testing of Metallic Materials
creep rupture strength E
E8M Test Methods for Tension Testing of Metallic Mate-
creep strength E
deep drawing D
rials [Metric]
deflectometer G
E796 Test Method for Ductility Testing of Metallic Foil
direct verification G
E1823 Terminology Relating to Fatigue and Fracture Test-
discontinuous yielding B
discontinuous yielding stress B
ing
ductility A
dynamic mechanical measurement G
3. Index of Terms
eccentricity B
edge distance F
3.1 The definitions of the following terms, which are listed
edge distance ratio F
alphabetically, appear in the indicated sections of 4.1.
elastic calibration device G
elastic constants see modulus of elasticity and Poisson’s
Term Section
accuracy G ratio
elastic force-measurement device G
alignment B
angle of bend D elastic limit A
elastic modulus see modulus of elasticity
angle of twist B
elastic true strain A
angular strain see strain
axial strain see strain elongation B
engineering strain see strain
bearing area F
bearing force F engineering stress see stress
extensometer G
bearing strain F
bearing strength F extensometer system G
fatigue ductility D
fatigue life B
forming limit curve D
forming limit diagram D
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This terminology is under the jurisdiction of ASTM Committee E28 on
fracture ductility A
Mechanical Testing and is the direct responsibility of Subcommittee E28.91 on
fracture strength A
Terminology except where designated otherwise. A subcommittee designation in
fracture stress see stress
parenthesesfollowingadefinitionindicatesthesubcommitteewithresponsibilityfor free bend D
that definition. force A
gage length G
Current edition approved June 1, 2007. Published June 2007. Originally
guided bend D
approved 1923. Last previous edition approved 2007 asE6–07.
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hardness C
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
indentation hardness C
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
indirect verification G
Standards volume information, refer to the standard’s Document Summary page on
initial recovery E
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E6–07a
initial strain E uniform elongation B
initial stress E upper yield strength B
Knoop hardness number C verification G
Knoop hardness test C Vickers hardness number C
limiting dome height D Vickers hardness test C
linear (tensile or compressive) strain see strain wrap-around bend D
load A yield point B
lower yield strength B yield point elongation B
macrostrain see strain yield strength B (also see upper yield strength and
malleability see ductility lower yield strength)
mandrel (in bend testing) D Young’s modulus A
zero time E
mechanical hysteresis A
mechanical properties A
4. Terminology
mechanical testing A
4.1 Terms and Definitions:
microstrain see strain
modulus of elasticity A
modulus of rigidity see modulus of elasticity
A. GENERAL DEFINITIONS
modulus of rupture in bending D
modulus of rupture in torsion B
constraint, n—any restriction to the deformation of a body.
necking B
(E28.11)
nominal stress see stress
normal stress see stress
ductility, n—the ability of a material to deform plastically
physical properties see mechanical properties
before fracturing. (E28.02)
pin see mandrel (in bend testing)
plastic true strain A
DISCUSSION—Ductility is usually evalua
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