ISO INTERNATIONAL STANDARD 6892-3 First edition 2015-04-15 Metallic materials - Tensile testing Part 3: Method of test at low temperature Matériaux metalliques - Essai de traction - Partie 3: Methode d'essai a basse temperature Reference number ISO 6892-3:2015(E) SO International Organization for Standardization @ IS0 2015 Zhejiang Institute of Standardization 5956617 vided by IHS under itted without license from IHS IS0 6892-3:2015(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISOcopyrightoffice Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland Prganizationfor Standardization Not for Resale, 2015/6/29 08:49:22 etworking permitted without license from IHS IS0 6892-3:2015(E) Contents Page Foreword ..V Introduction. ..vi 1 Scope. .1 2 Normative references ..1 3 Terms and definitions ..1 4 Symbols and designations ..2 5 Principle. .3 6 Test piece ..3 7 Determination of original cross-sectional area (So) ..3 8 Marking the original gauge length (Lo) ..3 6: Apparatus .3 9.1 Force measuring system. .3 9.2 Extensometer .3 9.3 Cooling device 9.3.1 General .3 9.3.2 Permitted deviations of temperature .4 9.3.3 Measurement of temperature .4 9.3.4 Verification of the temperature-measuring system. .5 10 Test conditions .5 10.1 Setting the force zero point .5 10.2 Gripping of the test piece, fixing of the extensometer and cooling of the test piece, notnecessarilyinthefollowingsequence .5 10.2.1 Method of gripping. ..5 10.2.2 Fixing of the extensometer and establishing the gauge length ..5 10.2.3 Cooling of the test piece. .6 10.3 Testing rate based on strain rate control (Method A) .6 10.3.1 General. ..6 10.3.2 Strain rate for the determination of the upper yield strength (ReH) or proof strength properties (Rp and, if required, Rt) ..6 10.3.3 Strain rate for the determination of the lower yield strength (ReL) and percentage yield point extension (Ae) if required. 10.3.4 Strain rate for the determination of the tensile strength (Rm), percentage elongation after fracture (A), percentage reduction area (z), and, if required, percentage total extension at the maximum force (Agt), percentage plastic extension at maximum force (Ag) 10.4 Method of testing with expanded strain rate ranges (Method B) 7 10.4.1 General .7 10.4.2 Rate for the determination of yield strength or proof strength properties .7 10.4.3 Rate for the determination of tensile strength .8 10.5 Choice of the method and rates .8 10.6 Documentation of the chosen testing conditions ..8 11 Determination or calculation of the properties ..8 12 Test report. ..8 13 Measurement uncertainty ..9 14 Figures. ..10 15 Annexes .11 Annex A (informative) Addition to IS0 6892-1:2009, Annexes B and D ..12 iii thout license from IHS