Normas Astm

Designation: E 8M – 04 METRIC

Standard Test Methods for

1. Scope* 1.1 These test methods cover the tension testing of metallic materials in any form at room temperature, specifically, the methods of determination of yield strength, yield point elongation, tensile strength, elongation, and reduction of area.
NOTE 1—These test methods are the metric companion of Test Methods E 8. CommitteeE-28 was granted an exception in 1997 by the Committee on Standards to maintain E8 and E8M as separate companion standards rather than combining standards as recommended by the Form and Style manual. NOTE 2—These metric test methods are essentially the same as those in Test Methods E 8, and are compatible in technical content except that gage lengths are required to be 5D for most round specimensrather than 4D as specified in Test Methods E 8. Test specimens made from powder metallurgy (P/M) materials are exempt from this requirement by industrywide agreement to keep the pressing of the material to a specific projected area and density. NOTE 3—Exceptions to the provisions of these test methods may need to be made in individual specifications or test methods for a particular material. Forexamples, see Test Methods and Definitions A 370 and Test Methods B 557M. NOTE 4—Room temperature shall be considered to be 10 to 38°C unless otherwise specified.

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 theapplicability of regulatory limitations prior to use. 2. Referenced Documents 2.1 ASTM Standards: 2

1 These test methods are under the jurisdiction of ASTM Committee E28 on Mechanical Testing and are the direct responsibility of Subcommittee E28.04 on Uniaxial Testing. Current edition approved April 1, 2004. Published May 2004. Originally approved in 1984. Last previous edition approved in 2003 as E 8M– 03. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website.

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Tension Testing of Metallic Materials [Metric]1
This standard is issued under the fixed designation E 8M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A numberin 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.

A 356/A356M Specification for Steel Castings, Carbon, Low Alloy, and Stainless Steel, Heavy-Walled for Steam Turbines A 370 Test Methods and Definitions for MechanicalTesting of Steel Products B 557M Test Methods of Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products [Metric] E 4 Practices for Force Verification of Testing Machines E 6 Terminology Relating to Methods of Mechanical Testing E 8 Test Methods for Tension Testing of Metallic Materials E 29 Practice for Using Significant Digits in Test Data to Determine Conformance withSpecifications E 83 Practice for Verification and Classification of Extensometers E 345 Test Methods of Tension Testing of Metallic Foil E 691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method E 1012 Practice for Verification of Specimen Alignment Under Tensile Loading 3. Terminology 3.1 Definitions—The definitions of terms relating to tension testing appearing in...