1、March 2014 Translation by DIN-Sprachendienst.English price group 6No 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 7
2、7.040.10!%,l#“2097300www.din.deDDIN EN ISO 8495Metallic materials Tube Ring-expanding test (ISO 8495:2013);English version EN ISO 8495:2013,English translation of DIN EN ISO 8495:2014-03Metallische Werkstoffe Rohr Ringaufdornversuch (ISO 8495:2013);Englische Fassung EN ISO 8495:2013,Englische berset
3、zung von DIN EN ISO 8495:2014-03Matriaux mtalliques Tubes Essai de dilatation danneaux (ISO 8495:2013);Version anglaise EN ISO 8495:2013,Traduction anglaise de DIN EN ISO 8495:2014-03SupersedesDIN EN ISO 8495:2004-10www.beuth.deIn case of doubt, the German-language original shall be considered autho
4、ritative.Document comprises 8 pages02.14 DIN EN ISO 8495:2014-03 2 A comma is used as the decimal marker. National foreword This document (EN ISO 8495:2013) has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals”, Subcommittee SC 2 “Ductility testing” (Secretariat: JISC, J
5、apan) in collaboration with Technical Committee ECISS/TC 110 “Steel tubes, and iron and steel fittings” (Secretariat: UNI, Italy) in accordance with the agreement on technical cooperation between ISO and CEN (Vienna Agreement). The responsible German body involved in its preparation was the Normenau
6、sschuss Materialprfung (Materials Testing Standards Committee), Working Committee NA 062-01-53 AA Rohrprfung fr Metalle. Amendments This standard differs from DIN EN ISO 8495:2004-10 as follows: a) the standard has been editorially revised. Previous editions DIN 50137: 1964-07, 1979-06 DIN EN 10236:
7、 1994-01 DIN EN ISO 8495: 2004-10 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM November 2013 ICS 77.040.10 Supersedes EN ISO 8495:2004English Version Metallic materials - Tube - Ring-expanding test (ISO 8495:2013) Matriaux mtalliques - Tubes - Essai de dilatation danneaux (ISO 8495:2013) Metall
8、ische Werkstoffe - Rohr - Ringaufdornversuch (ISO 8495:2013) This European Standard was approved by CEN on 28 October 2013. 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 wit
9、hout any alteration. Up-to-date lists and bibliographical 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
10、 language made by translation under the responsibility 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, D
11、enmark, Estonia, Finland, 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 United Kingdom. EUROPEAN COMMIT
12、TEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 8495:2013 EEN ISO 8495
13、Contents Page Foreword . 3 1 Scope . 4 2 Symbols, designations and units . 4 3 Principle 4 4 Apparatus 5 5 Test piece 5 6 Procedure 5 7 Test report . 6 2DIN EN ISO 8495:2014-03EN ISO 8495:2013 (E) This document (EN ISO 8495:2013) has been prepared by Technical Committee ISO/TC 164 Mechanical testing
14、 of metals in collaboration with Technical Committee ECISS/TC 110 “Steel tubes, and iron and steel fittings” the secretariat of which is held by UNI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest b
15、y May 2014, and conflicting national standards shall be withdrawn at the latest by May 2014. 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 responsible for identifying any or all such patent r
16、ights. This document supersedes EN ISO 8495:2004. 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, Finland,
17、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 ISO 84
18、95:2013 has been approved by CEN as EN ISO 8495:2013 without any modification. Foreword“”3DIN EN ISO 8495:2014-03EN ISO 8495:2013 (E)1 ScopeThis International Standard specifies a method for a ring-expanding test on tubes, that is used to reveal defects both on the surfaces and within the tube wall
19、by expanding the test piece using a conical mandrel until fracture occurs. It may be also used to assess the ability of tubes to undergo plastic deformation.The ring-expanding test is applicable to tubes having an outside diameter from 18 mm up to and including 150 mm and a wall thickness from 2 mm
20、up to and including 16 mm.2 Symbols, designations and unitsSymbols, designations and units for the ring-expanding test are given in Table 1 and are shown in Figure 1.Table 1Symbol Designation Unita aDDmmax.Dmmin.DukLWall thickness of the tubeOriginal outside diameter of the tubeMaximum diameter of t
21、he conical mandrelMinimum diameter of the conical mandrelMaximum outside diameter of the expanded part of the test pieceLength of the taper of the conical mandrelLength of the test piece before the testmmmmmmmmmmmmmmaThe symbol T is also used in steel tube standards.3 PrincipleExpanding a ring cut f
22、rom the end of a tube, over a conical mandrel until fracture, or until the expansion of the test piece reaches a value specified in the relevant product standard (see Figure 1).4DIN EN ISO 8495:2014-03EN ISO 8495:2013 (E) Figure 14 Apparatus4.1 Variable-speed press or universal testing machine.4.2 C
23、onical mandrel, having a working length preferably tapered 1:5 as shown in Figure 1, unless otherwise specified in the relevant product standard, and its surface shall be of sufficient hardness, well-polished and free from scores.5 Test piece5.1 The length of the test piece shall be between 10 mm an
24、d 16 mm. Test pieces shall be taken from the ends of deburred tubes as manufactured before they are cut to length. The rings shall be cut so that the planes of the end faces are parallel with each other and perpendicular to the axis of the tube.5.2 The edges of the test piece may be rounded by filin
25、g or chamfered by other methods.NOTE Non-rounded or non-chamfered edges are permissible, if the test result meets the test requirements.5.3 When welded tubes are subjected to the test, the internal weld flash may be removed.6 Procedure6.1 In general, the test shall be carried out at ambient temperat
26、ure within the limits of 10 C to 35 C. The test carried out under controlled conditions shall be made at a temperature of 23 C 5 C.5DIN EN ISO 8495:2014-03EN ISO 8495:2013 (E)6.2 Before testing, the rings and the conical mandrel may be lubricated. Rings of the same size and the same type of metal ma
27、y be placed one on top of each other. The rings and the conical mandrel shall be concentric (see Figure 1).6.3 Force the conical mandrel into the rings until the required expansion is reached or the rings fracture.6.4 The rate of penetration of the conical mandrel shall not exceed 30 mm/s.6.5 The re
28、lative expansion shall be calculated in accordance with the relevant product standard.6.6 Interpretation of the ring-expanding test shall be carried out in accordance with the requirements of the relevant product standard. When these requirements are not specified, the test piece shall be considered
29、 to have passed the test if no cracks are visible without the use of magnifying aids.7 Test reportA test report shall be provided when so specified in the relevant product standard. In this case, the test report shall include at least the following information:a) a reference to this International Standard, i.e. ISO 8495;b) identification of the test piece;c) dimensions of the test piece; d) relative expansion;e) taper of the conical mandrel if different from that given in 4.2;f) result of the test.6DIN EN ISO 8495:2014-03EN ISO 8495:2013 (E)
