1、July 2015Translation by DIN-Sprachendienst.English price group 14No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 77
2、.040.10!%D8q“2332178www.din.deDDIN EN ISO 6892-3Metallic materials Tensile testing Part 3: Method of test at low temperature (ISO 6892-3:2015);English version EN ISO 6892-3:2015,English translation of DIN EN ISO 6892-3:2015-07Metallische Werkstoffe Zugversuch Teil 3: Prfverfahren bei tiefen Temperat
3、uren (ISO 6892-3:2015);Englische Fassung EN ISO 6892-3:2015,Englische bersetzung von DIN EN ISO 6892-3:2015-07Matriaux mtalliques Essai de traction Partie 3: Mthode dessai basse temprature (ISO 6892-3:2015);Version anglaise EN ISO 6892-3:2015,Traduction anglaise de DIN EN ISO 6892-3:2015-07Supersede
4、sDIN ISO 15579:2002-06www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 31 pages07.15 DIN EN ISO 6892-3:2015-07 2 A comma is used as the decimal marker. National foreword This document (EN ISO 6892-3:2015) has been prepared by Technical C
5、ommittee ISO/TC 164 “Mechanical testing of metals”, Subcommittee SC 1 “Uniaxial testing” (Secretariat: AFNOR, France) in collaboration with Technical Committee ECISS/TC 101 “Test methods for steel (other than chemical analysis)” (Secretariat: AFNOR, France) in accordance with the agreement on techni
6、cal cooperation between ISO and CEN (Vienna Agreement). The responsible German body involved in its preparation was the DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-01-42 AA Zug- und Duktilitts-prfung fr Metalle. Users of this standard shou
7、ld take note of the following: The principle difference between this standard and DIN ISO 15579:2002-06 is the introduction of a test method based on strain rates (including the crosshead separation rate) with narrow tolerances ( 20 %) (method A). The strain rate (controlled by means of an extensome
8、ter) should be used when strain rate sensitive para-meters are determined and a reduction in measurement uncertainty (as regards the influence of the testing rate) is desirable. Extensive information on the application and control of the strain rate is provided here, and information is given on the
9、calculation of the crosshead separation rate necessary for maintaining the strain rate while neglecting, but also in consideration of, the compliance of the testing machine. The previous method based on conventional strain rate ranges and tolerances (now method B) has been slightly modified. The res
10、ponsibility for the choice of method and rates is now specified and a simple means of reporting the chosen methods and rates which is now required is recommended. After many discussions and extensive investigations carried out in various projects, the responsible national body NA 062-01-42 AA strong
11、ly recommends the use of method A as specified in this standard. Where parameters deviate, it is also recommended that the strain rate be determined at the same moment the parameters are determined. In most cases the digital data files (see DIN EN ISO 6892-1:2009-12, Figure A.1) can be used for this
12、 purpose if the time channel has also been recorded. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 2566-1 DIN EN ISO 2566-1 ISO 2566-2 DIN EN ISO 2566-2 ISO 6892-1 DIN EN ISO 6892-1 ISO 7500-1 DIN EN ISO 7500-1 ISO 9513 DIN EN ISO 951
13、3 ISO 80000-1 DIN EN ISO 80000-1 DIN EN ISO 6892-3:2015-07 3 Amendments This standard differs from DIN ISO 15579:2002-06 as follows: a) the number of the standard has been changed and the standard is now published as the first EN ISO Standard on tensile testing at low temperature; b) the former Nati
14、onal Annex referring to the specification of cooling conditions has been included in the scope of this document; c) the standard has been revised in form and substance; d) only additions and variations to the tests at room temperature are dealt with in this document; e) for common specifications rel
15、ated to tests at room temperature reference is made to ISO 6892-1; f) the calculation of stress, yield strength or proof strength, tensile strength and of the percentage reduction area based on the cross-sectional area of the test piece at room temperature has been rendered more precise; g) the calc
16、ulation of the percentage elongation after fracture based on the gauge length and elongation measured at room temperature has been rendered more precise; h) Subclause 10.2.2 describes different methods of establishing the extensometer gauge length according to common practice and specifies that the
17、method used is to be documented; i) Subclause 10.3 and subsequent subclauses differentiate between two methods relating to test rates; definitions of different test rates, information on the application, choice of the test rates and documentation have been included; j) in Annex A, examples of variou
18、s test piece geometries and tolerances corresponding to the general requirements of the standard have been included; k) Annex C “Measurement uncertainty” has been included taking into account temperature and test rate parameters as well as the type of cooling medium; l) the standard has been editori
19、ally revised. Previous editions DIN ISO 15579: 2002-06 DIN EN ISO 6892-3:2015-07 4 National Annex NA (informative) Bibliography DIN EN ISO 377, Steel and steel products Location and preparation of samples and test pieces for mechanical testing DIN EN ISO 2566-1, Steel Conversion of elongation values
20、 Part 1: Carbon and low alloy steels DIN EN ISO 2566-2, Steel Conversion of elongation values Part 2: Austenitic steels DIN EN ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature DIN EN ISO 7500-1, Metallic materials Verification of static uniaxial testing machi
21、nes Part 1: Tension/ compression testing machines Verification and calibration of the force-measuring system DIN EN ISO 9513, Metallic materials Calibration of extensometer systems used in uniaxial testing DIN EN ISO 80000-1, Quantities and units Part 1: General EN ISO 6892-3 April 2015 ICS 77.040.1
22、0 English Version Metallic materials - Tensile testing - Part 3: Method of test at low temperature (ISO 6892-3:2015) Matriaux mtalliques - Essai de traction - Partie 3: Mthode dessai basse temprature (ISO 6892-3:2015) Metallische Werkstoffe - Zugversuch - Teil 3: Prfverfahren bei tiefen Temperaturen
23、 (ISO 6892-3:2015) This European Standard was approved by CEN on 3 January 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and b
24、ibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the res
25、ponsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav R
26、epublic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Bru
27、ssels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6892-3:2015 EEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGContentsPa
28、ge Foreword . 4 Introduction . 5 1 Scope . 6 2 Normative references. 6 3 Terms and definitions 6 4 Symbols and designations 7 5 Principle 8 6 Test piece 8 7 Determination of original cross-sectional area (So) 8 8 Marking the original gauge length (Lo) . 8 9 Apparatus 8 9.1 Force measuring system . 8
29、 9.2 Extensometer 8 9.3 Cooling device 8 9.3.1 General 8 9.3.2 Permitted deviations of temperature 9 9.3.3 Measurement of temperature 9 9.3.4 Verification of the temperature-measuring system 10 10 Test conditions . 10 10.1 Setting the force zero point . 10 10.2 Gripping of the test piece, fixing of
30、the extensometer and cooling of the test piece, not necessarily in the following sequence 10 10.2.1 Method of gripping . 10 10.2.2 Fixing of the extensometer and establishing the gauge length 10 10.2.3 Cooling of the test piece . 11 10.3 Testing rate based on strain rate control (Method A) 11 10.3.1
31、 General 11 10.3.2 Strain rate for the determination of the upper yield strength (ReH) or proof strength properties (Rpand, if required, Rt) 11 10.3.3 Strain rate for the determination of the lower yield strength (ReL) and percentage yield point extension (Ae) if required . 12 10.3.4 Strain rate for
32、 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) . 12 10.4 Method of testing with expanded strain rate
33、ranges (Method B) 12 10.4.1 General 12 10.4.2 Rate for the determination of yield strength or proof strength properties 12 10.4.3 Rate for the determination of tensile strength 13 10.5 Choice of the method and rates . 13 10.6 Documentation of the chosen testing conditions 13 11 Determination or calc
34、ulation of the properties . 13 12 Test report . 13 13 Measurement uncertainty 14 14 Figures 15 15 Annexes 16 2DIN EN ISO 6892-3:2015-07 EN ISO 6892-3:2015 (E) Annex A (informative) Addition to ISO 6892-1:2009, Annexes B and D . 17 Annex B (informative) Example for cooling curves of steel depending o
35、n test piece dimensions and the specified test temperature in ethanol and liquid nitrogen . 22 Annex C (informative) Measurement uncertainty . 26 Bibliography 27 3DIN EN ISO 6892-3:2015-07EN ISO 6892-3:2015 (E)Foreword This document (EN ISO 6892-3:2015) has been prepared by Technical Committee ISO/T
36、C 164 “Mechanical testing of metals” in collaboration with Technical Committee ECISS/TC 101 “Test methods for steel (other than chemical analysis)” the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identica
37、l text or by endorsement, at the latest by October 2015, and conflicting national standards shall be withdrawn at the latest by October 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held res
38、ponsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Fin
39、land, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of
40、ISO 6892-3:2015 has been approved by CEN as EN ISO 6892-3:2015 without any modification. 4DIN EN ISO 6892-3:2015-07 EN ISO 6892-3:2015 (E) IntroductionIn this edition, there are two methods of testing speeds available. The first one, Method A, is based on strain rates (including crosshead separation
41、 rate) with narrow tolerances (20 %) and the second, Method B, is based on conventional strain rate ranges and tolerances. Method A is intended to minimize the variation of the test rates during the moment when strain rate sensitive parameters are determined and to minimize the measurement uncertain
42、ty of the test results.Mechanical properties determined by tensile test at low temperatures have been determined at the same rates at room temperature. This revised part of ISO 6892 incorporates the new set of testing rates of ISO 6892-1 and ISO 6892-2, developed to reduce the variability of test re
43、sults.5DIN EN ISO 6892-3:2015-07EN ISO 6892-3:2015 (E)WARNING This International Standard calls for the use of substances and/or procedures that can be injurious to health if adequate safety measures are not taken. This International Standard does not address any health hazards, safety or environmen
44、tal matters associated with its use. It is the responsibility of the user of this International Standard to establish appropriate health, safety and environmentally acceptable practices and take suitable actions for any national and international regulations. Compliance with this International Stand
45、ard does not in itself confer immunity from legal obligations.1 ScopeThis part of ISO 6892 specifies a method of tensile testing of metallic materials at temperatures between +10 C and -196 C.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this docum
46、ent and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 6892-1:2009, Metallic materials Tensile testing Part 1: Method of test at room temperature
47、ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring systemISO 9513, Metallic materials Calibration of extensometer systems used in uniaxial testing3 Terms and definitionsFor t
48、he purposes of this document, the terms and definitions given in ISO 6892-1:2009 and the following apply.In general, all test piece geometries/dimensions are based on measurements taken at room temperature. The exception can be the extensometer gauge length (see 3.3).NOTE The following properties ar
49、e generally not determined at low temperature unless required by relevant specifications or agreement: permanent set strength (Rr); percentage permanent elongation; percentage permanent extension; percentage yield point extension (Ae); percentage total extension at maximum force (Agt); percentage plastic extension at maximum force (Ag); percentage total extension at fracture (At).6DIN EN ISO 6892-3:2015-07 EN ISO 6892-3:201
