ISO INTERNATIONAL STANDARD 6892-1 Third edition 2019-11 Metallic materials Tensile testing Part 1: Method of test at room temperature Matériaux métalliques Essai de traction - Partie 1: Methode d'essai a température ambiante Reference number IS0 6892-1:2019(E) @ IS0 2019 IS0 6892-1:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 6892-1:2019(E) Contents Page Foreword ..V Introduction ..vi 1 Scope. 2 Normative references ..1 3 Terms and definitions ..1 4 Symbols. ..6 5 Principle. ..8 6 Test pieces. ..8 6.1 Shape and dimensions. ..8 6.1.1 General 6.1.2 Machined test pieces. .9 6.1.3 Unmachined test pieces .9 6.2 Types. .9 6.3 Preparation of test pieces .10 7 Determination of original cross-sectional area .10 8 Original gauge length and extensometer gauge length .10 8.1 Choice of the original gauge length .10 8.2 Marking the original gauge length. ..10 8.3 Choice of the extensometer gauge length .11 9 Accuracy of testing apparatus. ..11 10 Conditions of testing. .11 10.1 Setting the force zero point. .11 10.2 Method of gripping. .11 10.3 Testing rates .12 10.3.1 General information regarding testing rates .12 10.3.2 Testing rate based on strain rate (method A) .12 10.3.3 Testing rate based on stress rate (method B) .14 10.3.4 Report of the chosen testing conditions. ..15 11 Determination of the upper yield strength ..16 12 Determination of the lower yield strength ..16 13 Determination of proof strength, plastic extension .16 14 Determination of proof strength, total extension ..17 15 Method ofverification of permanent set strength ..17 16 Determination of the percentage yield point extension ..17 17 Determination of the percentage plastic extension at maximum force ..17 18 Determination of the percentage total extension at maximum force ..18 19 Determination of the percentage total extension at fracture ..18 20 Determination of percentage elongation after fracture ..18 21 Determination of percentage reduction of area. ..19 22 Test report .20 23 Measurement uncertainty .20 23.1 General 20 23.2 Test conditions. 21 23.3 Test results.. .21 @ IS0 2019 - All rights reserved iii IS0 6892-1:2019(E) Annex A (informative) Recommendations concerning the use of computer-controlled tensile testing machines 34 Annex B (normative) Types of test pieces to be used for thin products: sheets, strips, and flats between 0,1 mm and 3 mm thick. 40 Annex C (normative) Types of test pieces to be used for wire, bars, and sections with a diameterorthicknessoflessthan4mm 43 Annex D (normative) Types of test pieces to be used for sheets and flats of thickness equal to or greater than 3 mm and wire, bars, and sections of diameter or thickness equal to or greater than 4 mm. 44 Annex E (normative) Types of test pieces to be used for tubes 48 Annex F (informative) Estimation of the crosshead separation rate in consideration of the stiffness (or compliance) of the testing equipment 50 Annex G (normative) Determination of the modulus of elasticity of metallic materials using a uniaxial tensile test 52 Annex H (informative) Measuring the percentage elongation after fracture if the specified value is less than 5 %. 61 Annex I (informative) Measurement of percentage elongation after fracture based on subdivision of the original gauge length 62 Annex J (informative) Determination of the percentage plastic elongation without necking Awn, for long products such as bars, wire, and rods 64 Annex K (informative) Estimation of the uncertainty of measurement 65 Annex L (informative) Precision of tensile testing - Results from interlaboratory programmes..69 Bib