ASTM B557M-02a
(Test Method)Standard Test Methods of Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products [Metric]
Standard Test Methods of Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products [Metric]
SCOPE
1.1 These test methods cover the tension testing of wrought and cast aluminum- and magnesium-alloy products, excepting aluminum foil.
Note 1—These metric test methods are the equivalents of those in Test Methods B 557, and are compatible in technical content except for the requirement of longer gage lengths for round specimens.
Note 2—Exceptions to the provisions of these test methods may need to be made in individual specifications or test methods for a particular material.
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: B 557M – 02a
METRIC
Standard Test Methods of
Tension Testing Wrought and Cast Aluminum- and
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Magnesium-Alloy Products [Metric]
This standard is issued under the fixed designation B 557M; 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.
1. Scope* E 83 Practice for Verification and Classification of Exten-
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someter
1.1 These test methods cover the tension testing of wrought
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E 345 Test Methods of Tension Testing of Metallic Foil
and cast aluminum- and magnesium-alloy products, excepting
2 E 1012 Practice for Verification of Specimen Alignment
aluminum foil , and are derived from Test Methods E 8M,
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Under Tensile Loading
which cover the tension testing of all metallic materials.
NOTE 1—These metric test methods are the equivalents of those in Test 3. Terminology
Methods B 557, and are compatible in technical content except for the
3.1 The definitions of terms relating to tension testing
requirement of longer gage lengths for round specimens.
appearing in Terminology E 6 shall be considered as applying
NOTE 2—Exceptions to the provisions of these test methods may need
to the terms used in these test methods.
to be made in individual specifications or test methods for a particular
material.
4. Significance and Use
1.2 This standard does not purport to address all of the
4.1 Tension tests provide information on the strength and
safety concerns, if any, associated with its use. It is the
ductility of materials under uniaxial tensile stresses. This
responsibility of the user of this standard to establish appro-
information may be useful in comparisons of materials, alloy
priate safety and health practices and determine the applica-
development, quality control, and design under certain circum-
bility of regulatory limitations prior to use.
stances.
4.2 The results of tension tests of specimens machined to
2. Referenced Documents
standardized dimensions from selected portions of a part or
2.1 The following documents of the issue in effect at the
material may not totally represent the strength and ductility
timeofreferenceformapartofthesetestmethodstotheextent
properties of the entire end product or its in-service behavior in
referenced herein:
different environments.
2.2 ASTM Standards:
4.3 These test methods are considered satisfactory for ac-
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E 4 Practices for Force Verification of Testing Machines
ceptance testing of commercial shipments and have been used
E 6 Terminology Relating to Methods of Mechanical Test-
extensively in the trade for this purpose.
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ing
E 8M Test Methods for Tension Testing of Metallic Mate-
5. Apparatus
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rials [Metric]
5.1 Testing Machines—Machines used for tension testing
E 29 Practice for Using Significant Digits in Test Data to
shall conform to the requirements of Practices E 4. The forces
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Determine Conformance with Specifications
used in determining tensile strength and yield strength shall be
within the verified force application range of the testing
machine as defined in Practices E 4.
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These test methods are under the jurisdiction of ASTM Committee B07 on
5.2 Gripping Devices:
Light Metals and Alloys and are the direct responsibility of Subcommittee B07.05
5.2.1 General—Various types of gripping devices may be
on Testing.
Current edition approved Oct. 10, 2002. Published January 2003. Originally
used to transmit the measured load applied by the testing
published as B 557M – 76. Last previous edition B 557M – 02.
machine to the test specimens. To ensure axial tensile stress
2
For test methods of tension testing of aluminum foil, see Test Methods E 345.
3 within the gage length, the axis of the test specimen must
Annual Book of ASTM Standards, Vol 03.01.
4
Annual Book of ASTM Standards, Vol 14.02. coincide with the centerline of the heads of the testing
*A Summary of Changes section appears at the end of this standard.
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B 557M – 02a
machine. Any departure from this requirement may introduce
bending stresses that are not included in the usual stress
computation (load divided by cross-sectional area).
NOTE 3—The effect of this eccentric loading may be illustrated by
calculating the bending moment and stress thus added. For a standard
12.50-mm diameter specimen, the stress increase is 1.5 percentage points
for each 0.025 mm of eccentricity. This error increases to about 2.3
percentage points/0.025 mm for a 9-mm dia
...
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