INTERNATIONAL STANDARD
ISO 6892-1
Third edition 2019-11
Metallicmaterials-Tensiletesting Part 1: Methodoftestatroomtemperature
Materiauxmetalliques-Essaidetraction-Partie1:Methoded'essaiatemperatureambiante
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Contents
Page
Foreword. VIntroduction. vi1 Scope. 12 Normativereferences. 13 Terms and definitions. 14 Symbols. 65 Principle. 86 Test pieces. 86.1 Shape and dimensions.. 86.1.1 6.1.2 Machined test pieces. General. 86.1.3 Unmachined test pieces. 9 96.3 6.2 Types. Preparation of test pieces. 9Determination oforiginal cross-sectional area 107 108 Originalgaugelengthandextensometergaugelength. 8.1 Choice of the original gauge length. 10 108.2 Marking the originalgaugelength. 108.3 Choice of the extensometer gaugelength. 119 Accuracy of testing apparatus. 1110 Conditions of testing 10.1 Setting the force zeropoint. 11 1110.2 Method of gripping 1110.3 Testing rates. 10.3.1 Generalinformationregardingtestingrates. 12 1210.3.2 Testingrate based on strain rate(method A) 1210.3.4 10.3.3 Testingrate based on stressrate(method B) Report of the chosen testing conditions. 14Determination of theupperyield strength. 1511 1612 Determination of proof strength plastic extension Determination of thelower yieldstrength. 1613 1614 Determination ofproofstrength total extension 1715 Methodofverificationofpermanentsetstrength 1716 Determinationof thepercentageyieldpointextension .1717 Determinationofthepercentageplasticextensionat maximumforce. 1718 Determination of the percentage totalextension atmaximum force. 1819 Determinationof thepercentage total extension atfracture 1820 Determination of percentage elongationafterfracture. 1821 Determination of percentagereduction of area. 1922 Test report. .2023 Measurementuncertainty. 23.1 General. 20 2023.2 Test conditions. 2123.3 Test results. 21
AnnexA(informative)Remendations concerning theuse of puter-controlledtensile testingmachines. .34AnnexB(normative)Typesof testpiecestobeused forthinproducts:sheetsstrips andflatsbetween0 1mm and3mmthick 40AnnexC(normative)Typesoftestpiecestobeusedforwire bars andsectionswitha diameter or thickness ofless than 4mm.Annex D (normative)Types of test pieces to be used for sheets andflats of thickness equal .43toorgreaterthan3mmandwire bars andsectionsof diameterorthicknessequaltoorgreaterthan4 mm. 44Annex E(normative)Types of test pieces to be used for tubes 48AnnexF(informative)Estimation of the crossheadseparationrate in consideration ofthe stiffness (or pliance) of the testing equipment. 50Annex G(normative)Determination of themodulus of elasticityof metallicmaterialsusing a uniaxial tensile test. .52Annex H(informative)Measuring the percentage elongationafterfractureif the specifiedvalue isless than5% 61AnnexI(informative)Measurement of percentage elongation after fracturebasedon subdivision of the original gaugelength 62Awforlongroductssuchasbarswireandos 64AnnexK(informative) Estimation of the uncertainty of measurement. 65Annex L(informative) Precision of tensile testing-Results from interlaboratory programmes.69Bibliography .76
Foreword
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This document was prepared by Technical Committee ISO/TC 164 Mechanical testing ofmetals SubmitteeSC1 Uniaxial testing.
This third edition cancels andreplaces thesecondedition(Is0 6892-1:2016) of whichit constitutes aminor revision.The changes pared to the previous edition are as follows:
correction of the title ofa standard in Clause2;correction of the designation"coefficient of determination"("coefficient of determination”insteadof"coefficient of correlation");-correction of Formula(1):wording in 10.3.2.1:-wording in the key of Figure 9;--wording in Table B.2;--wording in Table D.3;
--correction of the references.
A list of all parts in the ISO 6892 series can be found on the ISO website.
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