ASTM E6-08

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation:E6–08
Standard Terminology Relating to
1
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
Term
angular strain see strain
1.1 This terminology covers the principal terms relating to
axial strain see strain
methods of mechanical testing of solids. The general defini-
bending strain see strain
chord modulus see modulus of elasticity
tions are restricted and interpreted, when necessary, to make
direct verification see verification
them particularly applicable and practicable for use in stan-
compressive stress see stress
dards requiring or relating to mechanical tests. These defini-
elastic constants see modulus of elasticity and Poisson’s
ratio
tions are published to encourage uniformity of terminology in
elastic modulus see modulus of elasticity
product specifications.
engineering strain see strain
1.2 Termsrelatingtofatigueandfracturetestingaredefined engineering stress see stress
fracture stress see stress
in Terminology E1823.
indirect verification see verification
linear (tensile or compressive) strain see strain
2. Referenced Documents
macrostrain see strain
2
malleability see ductility
2.1 ASTM Standards:
microstrain see strain
E8/E8M Test Methods for Tension Testing of Metallic
modulus of rigidity see modulus of elasticity
Materials
nominal stress see stress
normal stress see stress
E796 Test Method for Ductility Testing of Metallic Foil
physical properties see mechanical properties
E1823 Terminology Relating to Fatigue and Fracture Test-
pin see mandrel (in bend testing)
ing plunger see mandrel (in bend testing)
3
principal stress see stress
2.2 ISO Standard:
residual strain see strain
ISO/IEC Guide 99:2007 International Vocabulary of
residual stress see stress
metrology—Basic and general concepts and terms (VIM) Rockwell superficial see Rockwell hardness number
hardness number
secant modulus see modulus of elasticity
3. Index of Cross-References and Associated Definitions
shear strain see strain
3.1 The terms listed below are associated with terminology shear stress see stress
static fatigue strength see creep rupture strength
that is fundamental or commonly used. The definition for the
strain gage fatigue life see fatigue life
termofinterestisrelatedtoorisgivenbelowthedefinitionfor
stress-rupture strength see creep rupture strength
the fundamental term cited. tangent modulus see modulus of elasticity
tensile stress see stress
torsional modulus see modulus of elasticity
torsional stress see stress
1
This terminology is under the jurisdiction of ASTM Committee E28 on
transverse strain see strain
Mechanical Testing and is the direct responsibility of Subcommittee E28.91 on
true strain see strain
Terminology except where designated otherwise. A subcommittee designation in
true stress see stress
parenthesesfollowingadefinitionindicatesthesubcommitteewithresponsibilityfor
ultimate tensile strength (UTS) see tensile strength
that definition.
yield strength see also upper yield strength and lower
Current edition approved Feb. 1, 2008. Published February 2008. Originally
yield strength
approved in 1923. Last previous edition approved in 2007 as E6–07b.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4. Terminology
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
4.1 Terms and Definitions:
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 accuracy, n—the permissible variation from the correct value.
Available from International Organization for Standardization (ISO), 1 rue de
Varembé, Case postale 56, CH-1211, Geneva 20, Switzerland, http://www.iso.ch. (E28.01)
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
E6–08
2 2 –1 2
/
alignment, n—the condition of a testing machine and load
HBW 50.10232F/pD[D– ~D – d ! (1)
train (including the test specimen) that influences the intro-
where:
duction of bending moments into a specimen during tensile
F = test force, N,
loading. (E28.04)
D = diameter of ball, mm, and
angle of bend, n—the change in the angle between the two
d = mean diameter of the indentation, mm.
legs of the specimen during a bend test, measured before
(E28.06)
release of the bending forces. (E28.02)
DISCUSSION—In former standards, a steel ball was allowed for
DISCUSSION—The angle of bend is measured before release of the
hardness values belo
...