ASTM B557M-02

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Designation: B 557M – 02
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 (ε) 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 6 Terminology Relating to Methods of Mechanical Test-
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ing
1.1 These test methods cover the tension testing of wrought
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E 8 TestMethodsforTensionTestingofMetallicMaterials
and cast aluminum- and magnesium-alloy products, excepting
2 E 29 Practice for Using Significant Digits in Test Data to
aluminum foil.
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Determine Conformance with Specifications
NOTE 1—These metric test methods are the equivalents of those in Test
E 83 Practice for Verification and Classification of Exten-
Methods B 557, and are compatible in technical content except for the
4
someter
requirement of longer gage lengths for round specimens.
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E 345 Test Methods of Tension Testing of Metallic Foil
NOTE 2—Exceptions to the provisions of these test methods may need
E 1012 Practice for Verification of Specimen Alignment
to be made in individual specifications or test methods for a particular
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Under Tensile Loading
material.
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
3.1 The definitions of terms relating to tension testing
responsibility of the user of this standard to establish appro-
appearing in Terminology E 6 shall be considered as applying
priate safety and health practices and determine the applica-
to the terms used in these test methods.
bility of regulatory limitations prior to use.
4. Significance and Use
2. Referenced Documents
4.1 Tension tests provide information on the strength and
2.1 The following documents of the issue in effect at the
ductility of materials under uniaxial tensile stresses. This
timeofreferenceformapartofthesetestmethodstotheextent
information may be useful in comparisons of materials, alloy
referenced herein:
development, quality control, and design under certain circum-
2.2 ASTM Standards:
stances.
B 26/B 26M Specification forAluminum-Alloy Sand Cast-
4.2 The results of tension tests of specimens machined to
3
ings
standardized dimensions from selected portions of a part or
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B 80 Specification for Magnesium-Alloy Sand Castings
material may not totally represent the strength and ductility
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B 85 Specification for Aluminum-Alloy Die Castings
propertiesoftheentireendproductoritsin-servicebehaviorin
B 108 Specification for Aluminum-Alloy Permanent Mold
different environments.
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Castings
4.3 These test methods are considered satisfactory for ac-
B 618 Specification for Aluminum-Alloy Investment Cast-
ceptance testing of commercial shipments and have been used
3
ings
extensively in the trade for this purpose.
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E 4 Practices for Force Verification of Testing Machines
5. Apparatus
1 5.1 Testing Machines—Machines used for tension testing
These test methods are under the jurisdiction of ASTM Committee B07 on
shall conform to the requirements of Practices E 4. The forces
Light Metals and Alloys and are the direct responsibility of Subcommittee B07.05
on Testing.
used in determining tensile strength and yield strength shall be
Current edition approved April 10, 2002. Published July 2002. Originally
published as B 557M – 76. Last previous edition B 557M – 94.
2
For test methods of tension testing of aluminum foil, see Test Methods E 345.
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Annual Book of ASTM Standards, Vol 02.02.
4 5
Annual Book of ASTM Standards, Vol 03.01. Annual Book of ASTM Standards, Vol 14.02.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B557M–02
within the verified force application range of the testing
machine as defined in Practices E 4.
5.2 Gripping Devices:
5.2.1 General—Various types of gripping devices may be
used to transmit the measured load applied by the testing
machine to the test specimens. To ensure axial tensile stress
within the gage length, the axis of the test specimen must
coincide with the centerline of the heads of the testing
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 adde
...