1、July 2017 English price group 8No 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 19.100!%gub“2688263www.din.deDIN EN
2、ISO 16946Nondestructive testing Ultrasonic testing Specification for step wedge calibration block (ISO 16946:2017);English version EN ISO 16946:2017,English translation of DIN EN ISO 16946:2017-07Zerstrungsfreie Prfung Ultraschallprfung Beschreibung des StufenkeilKalibrierkrpers (ISO 16946:2017);Eng
3、lische Fassung EN ISO 16946:2017,Englische bersetzung von DIN EN ISO 16946:2017-07Essais non destructifs Essais par ultrasons Spcifications relatives aux blocs dtalonnage gradins (ISO 16946:2017);Version anglaise EN ISO 16946:2017,Traduction anglaise de DIN EN ISO 16946:2017-07SupersedesDIN EN ISO 1
4、6946:201507www.beuth.deDocument comprises 11 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.06.17 DIN EN ISO 16946:2017-07 2 A comma is used as the decimal marker. National foreword This document (EN ISO 16946:2017) has been p
5、repared by Technical Committee ISO/TC 135 “Non-destructive testing” in collaboration with Technical Committee CEN/TC 138 “Non-destructive testing” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Mat
6、erials Testing), Working Committee NA 062-08-23 AA “Ultrasonic testing”. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 2400 DIN EN ISO 2400 ISO 4287 DIN EN ISO 4287 ISO 5577 DIN EN ISO 5577 ISO 7963 DIN EN ISO 7963 Amendments This sta
7、ndard differs from DIN EN ISO 16946:2015-07 as follows: a) normative references have been updated; b) in Figure 1, tolerances for length and width have been updated. Previous editions DIN EN ISO 16946: 2015-07 National Annex NA (informative) Bibliography DIN EN ISO 2400, Non-destructive testing Ultr
8、asonic testing Specification for calibration block No. 1 DIN EN ISO 4287, Geometrical Product Specifications (GPS) Surface texture: Profile method Terms, definitions and surface texture parameters DIN EN ISO 5577, Non-destructive testing Ultrasonic testing Terminology DIN EN ISO 7963, Non-destructiv
9、e testing Ultrasonic testing Specification for calibration block No. 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 16946 March 2017 ICS 19.100 Supersedes EN ISO 16946:2015English Version Non-destructive testing - Ultrasonic testing - Specification for step wedge calibration block (ISO 1
10、6946:2017) Essais non destructifs - Essais par ultrasons - Spcifications relatives aux blocs dtalonnage gradins (ISO 16946:2017) Zerstrungsfreie Prfung - Ultraschallprfung - Beschreibung des Stufenkeil-Kalibrierkrpers(ISO 16946:2017) This European Standard was approved by CEN on 5 February 2017. CEN
11、 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 bibliographical references concerning such national standards may be obtained on appl
12、ication 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 responsibility of a CEN member into its own language and notified to the CEN-CENELEC Ma
13、nagement 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 Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lat
14、via, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Av
15、enue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 16946:2017 EEuropean foreword .3Introduction 51 Scope . 62 Normative references 63 Terms and definitions . 64 Dimensions . 65 Alternative dime
16、nsions . 76 Material 77 Preparation 78 Marking 89 Declaration of conformity . 8Bibliography 9Contents PageDIN EN ISO 16946:2017-07 EN ISO 16946:2017 (E) 2Foreword .4European foreword This document (EN ISO 16946:2017) has been prepared by Technical Committee ISO/TC 135 “Non-destructive testing” in co
17、llaboration with Technical Committee CEN/TC 138 “Non-destructive testing” 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 identical text or by endorsement, at the latest by September 2017, and conflicting
18、 national standards shall be withdrawn at the latest by September 2017. 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 rights. This document
19、supersedes EN ISO 16946:2015. 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, Former Yugoslav Repu
20、blic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 16946:2017 has
21、 been approved by CEN as EN ISO 16946:2017 without any modification. DIN EN ISO 16946:2017-07 EN ISO 16946:2017 (E)3 ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standa
22、rds is normally carried out through 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, governmental and non-governmental, in liaison with ISO, also tak
23、e part in the work. ISO collaborates closely 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 par
24、ticular the different approval criteria needed for the different types of ISO documents 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).Attention is drawn to the possibility that some of the elements
25、of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (se
26、e www .iso .org/ patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well
27、 as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .htmlThis document was prepared by Technical Committee ISO/TC 135, Non-destructive testing, Subcommittee SC 3, Ultrasonic
28、 testing.This second edition cancels and replaces the first edition (ISO 16946:2015), of which it constitutes a minor revision with the following changes:a) the normative references have been updated;b) Figure 1 has been updated in respect of the tolerances for length and width. DIN EN ISO 16946:201
29、7-07 EN ISO 16946:2017 (E) 4 IntroductionA step wedge calibration block is not meant to check an ultrasonic instrument. A step wedge calibration block makes it possible, during practical testing, to check simply, from time to time, the setting of the time base and the sensitivity of the ultrasonic e
30、quipment.Calibration block No. 1 is specified in ISO 2400.Calibration block No. 2 is specified in ISO 7963.Requests for official interpretations of any aspect of this document are to be directed to the Secretariat of ISO/TC 135/SC 3 via your national standards body, a complete listing of which can b
31、e found at www .iso .org.DIN EN ISO 16946:2017-07 EN ISO 16946:2017 (E)5 1 ScopeThis document specifies the dimensions, material, and manufacture of a step wedge steel block for the calibration of ultrasonic instruments.2 Normative referencesThe following documents are referred to in the text in suc
32、h a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 5577, Non-destructive testing Ultrasonic inspection
33、VocabularyEN 1330-4, Non-destructive testing Terminology Part 4: Terms used in ultrasonic testingEN 10025-2, Hot rolled products of structural steels Part 2: Technical delivery conditions for non-alloy structural steels3 Terms and definitionsFor the purposes of this document, the terms and definitio
34、ns given in ISO 5577 and EN 1330-4 apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp4 DimensionsThe dime
35、nsions of the block are given in Figure 1.The tolerances are 0,1 mm for the length and the width of the block and 0,02 mm for the step thickness.All external surfaces shall be machined to an Ra value not greater than 0,8 m.DIN EN ISO 16946:2017-07 EN ISO 16946:2017 (E) 6 Dimensions in millimetresKey
36、1 manufacturers trademark2 International Standard number, serial numberFigure 1 Step wedge calibration block5 Alternative dimensionsIn the event of a different size of calibration block being required which is not described in this document, the principles embodied in the design and manufacture of a
37、 calibration block to the requirements of this document shall be applied to such a block.The tolerances are 0,1 mm for the length and the width of the block and 0,02 mm for the step thickness up to 12,5 mm and 0,1 mm for larger thickness.6 MaterialThe calibration block shall be made from steel of gr
38、ade S355J0 in accordance with EN 10025-2 or from an equivalent steel grade.7 PreparationBlocks shall be rough-machined to a plan parallel plate which is at least 3 mm larger at all sides than the dimensions of the finalized step block.In order to obtain a fine grain structure and good homogeneity, t
39、he block shall be heat treated as follows:a) maintain at 920 C for 30 min;b) rapid cooling (quenching) in water;c) tempering by heating to 650 C for at least 3 h;d) cooling in still air.DIN EN ISO 16946:2017-07 EN ISO 16946:2017 (E)7 After heat treatment, at least 2 mm shall be removed from all surf
40、aces.Prior to final machining, the block shall undergo ultrasonic testing to prove that the block is free from internal discontinuities.For this purpose, an ultrasonic test shall be performed with a longitudinal wave normal-beam probe of at least 10 MHz nominal centre frequency and having a transduc
41、er size of 10 mm to 15 mm. The block shall be checked from at least two long surfaces to cover the complete volume. The following two acceptance criteria apply:1) with the probe scanning as shown in Figure 2, the noise level produced by the grain structure shall always be at least 50 dB lower than t
42、he amplitude of the fourth back wall echo;2) no echo arising from any discontinuity in the material shall have an amplitude greater than the grain scatter noise level.Figure 2 Scan patternThe velocity of longitudinal waves shall be verified as being 5 920 m/s 30 m/s.8 MarkingThe block shall be perma
43、nently marked witha) the manufacturers trademark,b) the number of this document, i.e. ISO 16946, andc) a unique serial number.9 Declaration of conformityFor each block, a declaration shall be issued by the manufacturer statinga) that the block complies with this document, andb) the mean value of the
44、 measured longitudinal wave velocities, vl.DIN EN ISO 16946:2017-07 EN ISO 16946:2017 (E) 8 Bibliography1 ISO 2400, Non-destructive testing Ultrasonic testing Specification for calibration block No. 12 ISO 4287, Geometrical Product Specifications (GPS) Surface texture: Profile method Terms, definitions and surface texture parameters3 ISO 7963, Non-destructive testing Ultrasonic testing Specification for calibration block No. 24 ISO 16809, Non-destructive testing Ultrasonic thickness measurement DIN EN ISO 16946:2017-07 EN ISO 16946:2017 (E)9
