ASTM E139-06
(Test Method)Standard Test Methods for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials
Standard Test Methods for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials
SIGNIFICANCE AND USE
Rupture tests, properly interpreted, provide a measure of the ultimate load-carrying ability of a material as a function of time. Creep tests measure the load-carrying ability for limited deformations. The two tests complement each other in defining the load-carrying ability of a material. In selecting material and designing parts for service at elevated temperatures, the type of test data used will depend on the criterion of load-carrying ability that better defines the service usefulness of the material.
SCOPE
1.1 These test methods cover the determination of the amount of deformation as a function of time (creep test) and the measurement of the time for fracture to occur when sufficient force is present (rupture test) for materials when under constant tensile forces at constant temperature. It also includes the essential requirements for testing equipment. For information of assistance in determining the desirable number and duration of tests, reference should be made to the product specification.
1.2 These test methods list the information which should be included in reports of tests. The intention is to ensure that all useful and readily available information is transmitted to interested parties. Reports receive special attention for the following reasons: (1) results from different, recognized procedures vary significantly; therefore, identification of methods used is important; (2) later studies to establish important variables are often hampered by the lack of detailed information in published reports; (3) the nature of prolonged tests often makes retest impractical, and at the same time makes it difficult to remain within the recommended variations of some controlled variables. A detailed report permits transmittal of test results without implying a degree of control which was not achieved.
1.3 Tests on notched specimens are not included. These tests are addressed in Practice E 292.
1.4 Tests under conditions of short times are not included. These test methods are addressed in Test Methods E 21.
1.5 The values stated in SI units are to be regarded as the standard.
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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Standards Content (Sample)
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Designation:E139–06
Standard Test Methods for
Conducting Creep, Creep-Rupture, and Stress-Rupture
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Tests of Metallic Materials
This standard is issued under the fixed designation E139; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) 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* 2. Referenced Documents
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1.1 These test methods cover the determination of the 2.1 ASTM Standards:
amount of deformation as a function of time (creep test) and E4 Practices for Force Verification of Testing Machines
the measurement of the time for fracture to occur when E6 TerminologyRelatingtoMethodsofMechanicalTesting
sufficient force is present (rupture test) for materials when E8 Test Methods for Tension Testing of Metallic Materials
under constant tensile forces at constant temperature. It also E21 Test Methods for Elevated Temperature Tension Tests
includes the essential requirements for testing equipment. For of Metallic Materials
information of assistance in determining the desirable number E29 Practice for Using Significant Digits in Test Data to
and duration of tests, reference should be made to the product Determine Conformance with Specifications
specification. E74 Practice of Calibration of Force-Measuring Instru-
1.2 These test methods list the information which should be ments for Verifying the Force Indication of Testing Ma-
included in reports of tests. The intention is to ensure that all chines
useful and readily available information is transmitted to E83 Practice for Verification and Classification of Exten-
interested parties. Reports receive special attention for the someter Systems
following reasons: (1) results from different, recognized pro- E177 Practice for Use of the Terms Precision and Bias in
cedures vary significantly; therefore, identification of methods ASTM Test Methods
used is important; (2) later studies to establish important E220 Test Method for Calibration of Thermocouples By
variables are often hampered by the lack of detailed informa- Comparison Techniques
tioninpublishedreports;(3)thenatureofprolongedtestsoften E292 Test Methods for Conducting Time-for-Rupture
makesretestimpractical,andatthesametimemakesitdifficult Notch Tension Tests of Materials
to remain within the recommended variations of some con- E633 GuideforUseofThermocouplesinCreepandStress-
trolled variables. A detailed report permits transmittal of test Rupture Testing to 1800°F (1000°C) in Air
results without implying a degree of control which was not E1012 PracticeforVerificationofTestFrameandSpecimen
achieved. Alignment Under Tensile and Compressive Axial Force
1.3 Testsonnotchedspecimensarenotincluded.Thesetests Application
are addressed in Practice E292. 2.2 Military Standard:
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1.4 Tests under conditions of short times are not included. MIL-STD-120 Gage Inspection
These test methods are addressed in Test Methods E21.
3. Terminology
1.5 The values stated in SI units are to be regarded as the
3.1 Definitions—The definitions of terms relating to creep
standard.
1.6 This standard does not purport to address all of the testing, which appear in Section E of Terminology E6 shall
apply to the terms used in this practice. For the purpose of this
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- practiceonly,someofthemoregeneraltermsareusedwiththe
restricted meanings given below.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 3.2 Definitions of Terms Specific to This Standard:
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These test methods are under the jurisdiction of theASTM Committee E28 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Mechanical Testing and is the direct responsibility of Subcommittee E28.04 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Uniaxial Testing. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved May 1, 2006. Published June 2006. Originally the ASTM website.
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approved in 1958. Last previous edition approved in 2000 as E139–00 . DOI: AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
10.1520/E0139-06. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
*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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E139–06
3.2.1 axial strain—the average of the strai
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