ASTM E643-09

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
An American National Standard Designation: E 643 – 09
Designation:E643–84 (Reapproved 1995)
Standard Test Method for
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Ball Punch Deformation of Metallic Sheet Material
This standard is issued under the fixed designation E 643; 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 (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
The ball punch deformation test is used for evaluating the ductility of metallic sheet materials. The
testinvolvesbiaxialstretchingofaconstrainedtestspecimen.Ideally,nodraw-inofflangemetalfrom
under the hold-down occurs. The sheet metal test specimen is bulged at a specified rate until the load
drops or until either necking or fracture occurs; the test is then terminated. Ball punch (penetrator)
movementtodropin-loadorneckingorfractureisthetestresult.Itisknownthattestresultsmayvary
with hold-down force, lubrication, and criterion for determining the end point of the test.
1. Scope
1.1 This test method covers the procedure for conducting the ball punch deformation test for metallic sheet materials intended
for forming applications. The test applies to specimens with thicknesses between 0.008 and 0.080 in. (0.20 and 2.00 mm).
1.2 The values stated in inch–pound units are to be regarded as the standard.
NOTE 1—The ball punch deformation test is intended to replace the Olsen cup test by standardizing many of the test parameters that previously have
been left to the discretion of the testing laboratory.
NOTE 2—The modified Erichsen test has been standardized in Europe. The main differences between the ball punch deformation test and the Erichsen
test are the diameters of the penetrator and the dies. Erichsen cup heights are given in SI units.
1.3
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.4 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.
2. Referenced Documents
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2.1 ASTM Standards:
E 177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E180Practice for Determining the Precision ofASTM Methods forAnalysis and Testing of Industrial Chemicals 691 Practice
for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
2.2 National Institute of Standards and Technology Document:
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NIST Handbook 91Experimental Statistics
NIST Handbook 91 Experimental Statistics
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 cup height, the height of the formed cup at the end point of the test.
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This test method is under the jurisdiction of ASTM Committee E-28E28 on Mechanical Testing,Testing and is the direct responsibility of Subcommittee E28.02 on
Ductility and Flexure.
Current edition approved April 27, 1984. Published July 1984. Originally published as E643–78. on Ductility and Formability.
Current edition approved June 1, 2009. Published June 2009. Originally published in 1978. Last previous edition approved in 2000 as E 643 -84(2000) which was
withdrawn March 2009 and reinstated in June 2009.
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For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 14.02.volume information, refer to the standard’s Document Summary page on the ASTM website.
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Annual Book of ASTM Standards, Vol 15.05.
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Available from National Institute of Standards and Technology (NIST), 100 Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E643–09
4. Significance and Use
4.1 The ball punch deformation test is widely used to evaluate and compare the formability of metallic sheet materials. Biaxial
stretching is the predominant mode of deformation occurring during the test and, therefore, the results are most often used to rate
or compare materials that are to be formed mainly by stretching. However, precise correlations between the
...