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1、INTERNATIONALSTANDARDISO 6892-1ISO 6892-l:2019(E)Third edition2019-11Metallic materials Tensile testing Part 1:Method of test at room temperatureMatehaux metaUiques ESSai de traction Partie 1: Methode dessai d temperature ambianteReference numberISO 689212019E)PageContentsForewordvIntroduction. vi2
2、Normativereferences3 Terms and definitions4 Symbols. 8 8 8 8 9 9 95 Principle6 lst piBCeS6.1 Shape and dimensions6.1.1 General6.1.2 Machined test pieces 6.1.3 Unmachined test pieces6.3 Preparation of test pieces 107 Determination of origins cross*sctio31area .108 Original gauge length and extensomet
3、er gauge length . 108.1 Choice of the original gauge length108.2 Marking the original gauge length108.3 Choice of the extensometer gauge length 119 Accuracy of testi ng NPPAEttIy 1110 Conditions of testing1110.1 Setting the force zero point 1110.2 M thod of gripping 1110.3 3 Testingrdtes1210.3.1 Gen
4、eraIInformation rarding IeSIIng a3les. . 1210.3.2 Testing rate based on strain rate (method A)1210.3.3 Testing rate based on stress rate (method B)1410.3.4 Report of the chosen【esting ConditionS1511Determination of the upper yield strength 1612Determination of the lower yield strength. 1613 Determin
5、ation of proof strength, plastic extension - -“1614 Determination of proof strength, total PXgn7m L“.1715Method of verification of permanent set strength 1716Determination of the percentage yield point extension 1717Determination of the percentage plastic extension at maximum force 1718Determination
6、 of the percentage total extension at maximum force 1819Determination of the percentage total extension at fracture1820 Determination of percentage elongation after fracture 1821 Determination of percentage reduction of ,ra 一 . _IQ23 Measurement uncertainty_2023.1 General. 202 二 2?$ I cf d 111C vs 2
7、1 ISO 2019 All rights reservedHiISO 6892-l:2019(E)Annex A (informative) Recommendations concerning the use of computer-controlled tensile testing machines34Annex B (normative) Types of test pieces to be USBd for thin products: sheets, strips, and flats between O1I mm and 3 mm thick 一 一 ： 一 “40Annex
8、C (normative) Types of test pieces to be used for wire, bars, and sections with a diameter or thickness of less than 4 mm 43Annex D (normative) Types of test pieces to be used for sheets and flats OfthiCkneSS equal to or greater than 3 mm and wire, bars, and sections of diameter or thickness equal t
9、o or* g*eater than 4 unit.Annex E (normative) Types of test pieces to be used for tubes 48Annex F (informative) Estimation of the crosshead separation rate in consideration of the stiffness (or compliance) of the testing equipment 50Annex G (normative Determination of the modulus of elasticity of me
10、tallic materials using a uniaxial tensile test52Annex H (informative) Measuring the percentage elongation after fracture if the specified value is less than 5 %61Annex I (informative) Measurement of percentage elongation after fracture based on subdivision of the original gauge length 62Annex J (inf
11、ormative) Determination of the percentage plastic elongation without necking, lwn, for long products SUCh as bars, wire, and rods 64Annex K (informative) Estimation of the uncertainty of measurement 65Annex L (informative) Precision of tensile testing Results from interlaboratory programmes 69Biblio
12、graphy76#O ISO 2019 All rights reservedISO 6892-l:2019(E)ForewordISO (the International Organization for Standardization) is a Worldwidefederation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees.
13、 Each member body Interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmenta 1, in liaison with ISO, also take part in the work. ISO collaborates closely with the Intern
14、ational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the diff
15、erent types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (SeR WWWjSdoogdirecives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall no
16、t be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see ww wJso.org/patents).Any trade name used in this document is inf
17、ormation given for the convenience of users and does not constitute an endorsement.For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization
18、(WTO) principles in IheTechnicaI Barriers to Trade (TBT) see wwwJso-org/ iso/fbreword.html.This document was prepared by Technical Committee ISO/TC 164, Mechanical testing of metalst Subcommittee SC 1, Uniaxial testing.This third edition cancels and replaces the second edition (ISO 6892-1:2016), of
19、which it constitutes a minor revision. The changes compared to the previous edition are as follows: correction of the title of a standard in ClaUSe2 correction of the designation coefficient of determination (coefficient of delerninationv, instead of*,coefficient of correlation); correction of FOrmU
20、la ; wording in 10.3 extension (3E) between the start of yielding and the start of uniform work-hardening, expressed as a percentage of the extensometer gauge length (33.6.6percentage total extension at fracturetotal extension (X6) (elastic extension plus plastic extension) at the moment of fracture
21、, expressed as a percentage of the extensometer gauge length (3.5)Note 1 to entry: See Figure 1.3.7testing raterate (resp. rates) used during the test3.7.1strain rateincrease of strain, measured with an extensometer, in extensometer gauge length (3J5), per time3.7.2estimated strain rate over the par
22、allel lengthvalue of the increase of strain over the rallel length (32) of the test piece per time based on the crosshead separation rate (373) and the parallel length of the test piece3.7.3crosshead separation rate%displacement of the crossheads per time3.7.4stress rateRincrease Distress (3.10) per
23、 timeNote 1 to entry: Stress rate IS only used in the elastic part of the test (method B)(See also 10JJ). ISO 2019 - All rights reservedISO 6892-l:2019(E)3.8percentage reduction of areaZmaximum change in cross-sectional area which has occurred during the test 瓦-Su)t expressed as a percentage of the
24、original cross sectional area, :Z = -5y-1003.9 Maximum force3.9.1maximum force highest force that the test piece withstands during the test3.9.2maximum force highest force that the test piece withstands during Lhe test after the beginning of work-hardeningNote 1 to entry: For materials which display
25、 discontinuous yielding, but where no work-hardening can be established, Fm is not defined in this document see footnote to FlgUre 8 c).Note 2 to entry: See FiKUre 8 a) and b).3.10stressRat any moment during the test, force divided by the original cross-sectional area, So, of the test pieceNote 1 to
26、 entry: All references to stress in this document are to engineering stress.3.10.1tensile strengthRmStreSS (3Jo) corresponding to the maximum force (392)3.10.2yield strengthwhen the metallic material exhibits a yield phenomenon, stress (3JJ) corresponding to the point reached during the test at whic
27、h plastic deformation occurs without any increase in the force3.10.2.1upper yield strengthmaximum value of stress (3.10) prior to the first decrease in forceNote 1 to entry: See Flgllre 2.3.10.2.2Ioweryield strengthReLlowest value of stress (3JD) during plastic yielding, ignoring any initial transie
28、nt effectsNote 1 to entry: See EigurB2.#O ISO 2019 AU rights reservedISO 6892-l:2019(E)3.10.3proof strength, plastic extensionstress3JI) at which the plastic extension (X6) is equal to a specified percentage of the extensometer gouge length (33)Note 1 to entry: Adapted from ISO/TR 25679:2005, proof strength, non-proportonal extension14.Note 2 to entry: A suffix is added to the subscript to indicate the prescnbed percentage, e.g. p0 2Note 3 to entry: See Fig