International ISO Standard ISO 37 Rubber, vulcanized or Seventh edition thermoplastic - Determination of 2024-05 tensile stress-strain properties Caoutchouc vulcanisé ou thermoplastique - Détermination des caracteristiques de contrainte-déformation en traction Reference number ISO 37:2024(en) @ ISO 2024 IS02024 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may 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. ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Publishedin Switzerland @IS0 2024 - All rights reserved ii Contents Page Foreword. V 1 Scope .1 2 Normative references .1 3 Terms, definitions and abbreviated terms .1 4 Principle .4 5 General 6 Test pieces. .4 6.1 General ..4 6.2 Dumbbells 6.3 Rings. ..5 7 Apparatus. .6 7.1 Dies and cutters. ..6 7.2 Thickness gauge ..6 7.3 Cone gauge. ..6 7.4 Tensile-testing machine 7.5 Test rig for ring test pieces ..8 8 Calibration. .9 9 Number of test pieces .9 10 Preparation of test pieces .9 10.1 Dumbbells 10.2 Rings.... ..9 11 Conditioning of sample and test pieces .10 11.1 Time between vulcanization and testing .10 11.2 Protection of samples and test pieces. .10 11.3 Conditioning of samples .10 11.4 Conditioning of test pieces. .10 12 Marking of dumbbell test pieces .10 13 Measurement of test pieces 10 13.1 Dumbbells .10 13.2 Rings.. .11 13.3 Comparison of groups of test pieces .11 14 Procedure. .11 14.1 Dumbbell test pieces .11 14.2 Ring test pieces. .11 15 Temperature of test. .12 16 Calculation of results .12 16.1 Dumbbells .12 16.2 Ring test pieces. ..14 17 Expression of results. .15 18 Precision. .15 19 Test report. .15 Annex A (informative) Preparation of type B ring test pieces ..17 Annex B (informative) Precision ..20 Annex C (informative) Analysis of ITP data and dumbbell shape .26 Annex D (normative) Calibration schedule .30 @ IS0 2024 - All rights reserved iii Bibliography .32 @ IS0 2024 - All rights reserved iv Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies(isoOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthrough IsO technical committees. 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, with the International 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 different types of Iso document should be noted. This document was drafted in accordance with the editorial rules of the ISo/IEC Directives, Part 2 (see www.iso.org/directives). Iso draws attention to the possibility that the implementation of this document may involve the use of (a) patent(s). Iso takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect thereof. As of the date of publication of this document, Iso had not received notice of (a) patent(s) which may be required to implement this document. However, implementers are cautioned that this may not represent the latest information, which may be obtained from the patent database available at www.iso.org/patents. IsO shall not be held responsible for identifying any or all such patent rights. Any trade name used in this document is information 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 asses