EN 14977:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Copper and copper alloys - Detection of tensile stress - 5 % ammonia testBaker in bakrove zlitine - Ugotavljanje natezne napetosti - Preskus s 5-odstotnim amoniakomCuivre et alliages de cuivre - Détection des contraintes de traction - Essai a l'ammoniaque a 5 %Kupfer und Kupferlegierungen - Auffinden von Zugspannungen - 5 % AmmoniakprüfungTa slovenski standard je istoveten z:EN 14977:2006SIST EN 14977:2006en77.120.30ICS:SLOVENSKI
STANDARDSIST EN 14977:200601-september-2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14977June 2006ICS 77.150.30 English VersionCopper and copper alloys - Detection of tensile stress - 5 %ammonia testCuivre et alliages de cuivre - Détection des contraintes detraction - Essai à l'ammoniaque à 5 %Kupfer und Kupferlegierungen - Auffinden vonZugspannungen - 5 % AmmoniakprüfungThis European Standard was approved by CEN on 15 May 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14977:2006: E

Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Principle.5 3 Terms and definitions.5 4 Test solution.5 5 Test pieces.6 6 Procedure.6 7 Test requirements.6 8 Test report.6 Bibliography.7

Foreword This document (EN 14977:2006) has been prepared by Technical Committee CEN/TC 133 “Copper and copper alloys”, the secretariat of which is held by DIN. 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 December 2006, and conflicting national standards shall be withdrawn at the latest by December 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Introduction This test was developed to achieve three aims in particular:  firstly to avoid health and environmental risks which are associated with the use of media other than ammonia, (e.g. with the use of compounds of mercury and recovery of mercury polluted test pieces), but with a similar sensitivity as the test according to EN ISO 196;  secondly to combine a test on tensile stress with a test on stress corrosion cracking;  thirdly to reduce the test duration from usually 24 h, as specified in ISO 6957, to 16 h. It is not intended to replace and withdraw EN ISO 196 in favour of this standard. In so far as a rapid result is required, the test according to EN ISO 196 can be used.

1 Scope This standard specifies a medium-duration test using
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