SIST EN 10277-4:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Blankstahlerzeugnisse - Technische Lieferbedingungen - Teil 4: EinsatzstähleProduits en acier transformés à froid - Conditions techniques de livraison - Partie 4: Aciers pour cémentationBright steel products - Technical delivery conditions - Part 4: Case hardening steels77.140.01Železni in jekleni izdelki na splošnoIron and steel products in generalICS:Ta slovenski standard je istoveten z:EN 10277-4:2008SIST EN 10277-4:2008en,de01-maj-2008SIST EN 10277-4:2008SLOVENSKI
STANDARDSIST EN 10277-4:20001DGRPHãþD



SIST EN 10277-4:2008



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10277-4March 2008ICS 77.140.20; 77.140.60Supersedes EN 10277-4:1999
English VersionBright steel products - Technical delivery conditions - Part 4:Case hardening steelsProduits en acier transformés à froid - Conditionstechniques de livraison - Partie 4: Aciers pour cémentationBlankstahlerzeugnisse - Technische Lieferbedingungen -Teil 4: EinsatzstähleThis European Standard was approved by CEN on 4 February 2008.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 CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10277-4:2008: ESIST EN 10277-4:2008



EN 10277-4:2008 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.4 4 Classification and designation.4 4.1 Classification.4 4.2 Designation.4 5 Information to be supplied by the purchaser.4 6 Manufacturing process.4 7 Requirements.5 7.1 Chemical composition.5 7.2 Mechanical properties.5 7.3 Hardenability.5 7.4 Grain size.5 7.5 Non-metallic inclusions.5 7.6 Options.5 8 Inspection and testing.5 8.1 Types and contents of inspection documents.5 8.2 Specific inspection.5 8.3 Verification of hardenability.6 9 Marking.6
SIST EN 10277-4:2008



EN 10277-4:2008 (E) 3 Foreword This document (EN 10277-4:2008) has been prepared by Technical Committee ECISS/TC 23 “Steels for heat treatment, alloy steels and free-cutting steels - Qualities and dimensions”, 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 September 2008, and conflicting national standards shall be withdrawn at the latest by September 2008. 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 supersedes EN 10277-4:1999. 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, 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 the United Kingdom. This European Standard EN 10277 'Bright steel products - Technical delivery conditions' is subdivided as follows: Part 1: General; Part 2: Steels for general engineering purposes; Part 3: Free-cutting steels; Part 4: Case hardening steels; Part 5: Steels for quenching and tempering. During the preparation of the first edition of this European Standard there were not enough statistical data available concerning mechanical properties of bright bar products. Since then it has been recognized that the proof strength values in the cold drawn condition were too high. In addition, cyclic stresses that occur during straightening can reduce the proof strength (Bauschinger's effect), which was not taken into account when drafting the first edition of this standard. In this second edition the proof strength values of non-alloy and alloy grades in condition +QT+C in parts 3 and 5 have been adjusted downwards compared to the first edition.
SIST EN 10277-4:2008



EN 10277-4:2008 (E) 4 1 Scope This part of EN 10277 applies to bright steel bars in the drawn, turned or ground condition, in straight lengths of case hardening steels.
This EN 10277-4 is complemented by EN 10277-1.
2 Normative references The following referenced documents are indispensable for the application 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. EN 10084, Case hardening steels - Technical delivery conditions EN 10277-1, Bright steel products - Technical delivery conditions - Part 1: General 3 Terms and definitions For the purposes of this European Standard, the term
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