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Significance and Use
4.1 Tension tests provide information on the strength and ductility of materials under uniaxial tensile stresses. This information may be useful in comparisons of materials, alloy development, quality control, and design.
4.2 The results of tension tests from selected portions of a part or material may not totally represent the strength and ductility of the entire end product of its in-service behavior in different environments.
4.3 These test methods are considered satisfactory for acceptance testing of commercial shipments, since the methods have been used extensively for these purposes.
4.4 Tension tests provide a means to determine the ductility of materials through the measurement of elongation or reduction of area. However, as specimen thickness is reduced, tension tests may become less useful for determining ductility. For these purposes Test Method is an alternative procedure for measuring ductility.
4.5 Different industries differentiate between foil and sheet at different thicknesses.
Note 1: In 2013, to harmonize with international standards, the Aluminum Association revised its definition of foil to include thicknesses less than or equal to 0.2 mm (0.0079 in.).
4.6 This standard differs from Test Methods in that it permits determining the specimen thickness by weighing ( ) and determining the elongation from crosshead displacement for some specimens ( ).
4.7 It is impossible for this standard to define the thickness range for every possible alloy where this standard should be used instead of Test Methods or other tensile test standards. Superior results for a specific alloy and thickness could be obtained by measuring the specimen thickness by weighing ( ) to avoid damaging the material and to obtain sufficient accuracy. In addition, it may be acceptable for a given alloy and thickness to determine the elongation from crosshead displacement in cases where conventional extensometers that contact the specimen or scribed fiducial marks could damage the specimen or affect the test results.
1.1 These test methods cover the tension testing of metallic foil at room temperature. Exception to these methods may be necessary in individual specifications or test methods for a particular material.
1.2 Units—The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.
1.3 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B193 Test Method for Resistivity of Electrical Conductor Materials
E4 Practices for Force Verification of Testing Machines
E6 Terminology Relating to Methods of Mechanical Testing
E8/E8M Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E252 Test Method for Thickness of Foil, Thin Sheet, and Film by Mass Measurement
E796 Test Method for Ductility Testing of Metallic Foil
E2309 Practices for Verification of Displacement Measuring Systems and Devices Used in Material Testing Machines
ICS Number Code 77.040.10 (Mechanical testing of metals)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM E345-16, Standard Test Methods of Tension Testing of Metallic Foil, ASTM International, West Conshohocken, PA, 2016, www.astm.orgBack to Top