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1 EESTI STANDARD EVS-EN 10089:2003 Hot-rolled steels for quenched and tempered springs - Technical delivery conditions Hot-rolled steels for quenched and tempered springs - Technical delivery conditions EESTI STANDARDIKESKUS

2 EESTI STANDARDI EESSÕNA NATIONAL FOREWORD Käesolev Eesti standard EVS-EN 10089:2003 sisaldab Euroopa standardi EN 10089:2002 ingliskeelset teksti. Käesolev dokument on jõustatud ja selle kohta on avaldatud teade Eesti standardiorganisatsiooni ametlikus väljaandes. Standard on kättesaadav Eesti standardiorganisatsioonist. This Estonian standard EVS-EN 10089:2003 consists of the English text of the European standard EN 10089:2002. This document is endorsed on with the notification being published in the official publication of the Estonian national standardisation organisation. The standard is available from Estonian standardisation organisation. Käsitlusala: This European Standard specifies the technical delivery requirements for round and flat bars, ribbed and grooved bars and rod manufactured from the alloy steels listed in Table 3, intended for hotformed and subsequently heat-treated springs or coldformed and subsequently heat-treated springs. The products are supplied in one of the heat-treatment conditions given for the different types of products in Table 1, lines 2 to 6, and in one of the surface conditions given in Table 2 Scope: This European Standard specifies the technical delivery requirements for round and flat bars, ribbed and grooved bars and rod manufactured from the alloy steels listed in Table 3, intended for hot-formed and subsequently heat-treated springs or coldformed and subsequently heat-treated springs. The products are supplied in one of the heat-treatment conditions given for the different types of products in Table 1, lines 2 to 6, and in one of the surface conditions given in Table 2 ICS Võtmesõnad: acceptance testing, consistency, inspection, marking, materials, measurement, production, properties, specification (approval), specifications, spring steels, springs, steel products, steel springs, steels, testing, tolerances, tolerances (measurement)

3 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN December 2002 ICS English version Hot-rolled steels for quenched and tempered springs - Technical delivery conditions Aciers laminés à chaud pour ressorts trempés et revenus - Conditions techniques de livraison Warmgewalzte Stähle für vergütbare Federn - Technische Lieferbedingungen This European Standard was approved by CEN on 1 November 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 bibliographical references concerning such national standards may be obtained on application to the 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2002 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10089:2002 E

4 Contents page Foreword Scope Normative references Terms and definitions Classification and designation Classification Designation Information to be supplied by the purchaser Mandatory information Options Manufacturing process General Deoxidation Heat-treatment and surface condition at delivery Requirements Chemical composition, hardness and hardenability Shearability Structure Internal soundness Surface quality and decarburisation Dimensions, tolerances on dimensions and shape Inspection and testing Types and contents of inspection documents Specific inspection and testing Marking...10 Annex A (normative) Supplementary or special requirements...29 A.1 Content of non-metallic inclusions...29 A.2 Non-destructive testing...29 A.3 Product analysis...29 A.4 Special agreements for marking...29 Annex B (informative) Maximum dimensions for rounds and flats based on the 100% hardenability scatterband (see Table 7)...30 Annex C (informative) Dimensional standards applicable to products complying with this European Standard...31 Annex D (informative) Guidance values for the mechanical properties of quenched and tempered test pieces (maximum dimensions as given in Table 5)...32 Bibliography

5 Foreword This document (EN 10089:2002) 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 June 2003, and conflicting national standards shall be withdrawn at the latest by June In this European Standard annex A is normative and annexes B, C and D are informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 3

6 1 Scope 1.1 This European Standard specifies the technical delivery requirements for round and flat bars, ribbed and grooved bars and rod manufactured from the alloy steels listed in Table 3, intended for hot-formed and subsequently heat-treated springs or cold-formed and subsequently heat-treated springs. The products are supplied in one of the heat-treatment conditions given for the different types of products in Table 1, lines 2 to 6, and in one of the surface conditions given in Table In special cases, variations in these technical delivery requirements or additions to them may form the subject of an agreement at the time of enquiry and order (see annex A). 1.3 In addition to the specifications of this European Standard, the general technical delivery requirements of EN are applicable. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 10020, Definition and classification of grades of steel. EN 10021, General technical delivery requirements for steel and iron products. EN , Designation systems for steel Part 1: Steel names, principal symbols. EN , Designation systems for steel Part 2: Numerical system. EN 10052, Vocabulary of heat treatment terms for ferrous products. EN 10079, Definition of steel products. EN 10204, Metallic products Types of inspection documents. EN 10221, Surface quality classes for hot-rolled bars and rods Technical delivery conditions. EN ISO 377, Steel and steel products Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997). EN ISO 642, Steel Hardenability test by end quenching (Jominy test) (ISO 642:1999). EN ISO , Metallic materials Brinell hardness test Part 1: Test method (ISO :1999). EN ISO , Metallic materials Rockwell hardness test - Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T)(ISO :1999). EN ISO 14284, Steel and iron Sampling and preparation of samples for the determination of chemical composition (ISO 14284:1996) CR 10260, Designation systems for steels Additional symbols. CR 10261, ECISS Information Circular 11 - Iron and steel Review of available methods of chemical analysis. 4

7 EURONORM 103 1), Microscopic determination of the ferritic or austenitic grain size of steels. EURONORM 104 1), Determination of the depth of decarburization of non-alloy and low alloy structural steels. 3 Terms and definitions For the purposes of this European Standard, the following term and definition apply in addition to the terms and definitions given in EN 10020, EN 10052, EN 10079, EN ISO 377 and EN ISO spring steels materials which are, because of their properties in the quenched and tempered condition, particularly suitable for the manufacture of spring like components of all kinds. The resilience of the steels depends on their elastic deformability, which enables them to sustain loading within a given range without exhibiting any permanent deformation when the load is removed. The properties required of the steels for springs are obtained by higher carbon contents and alloying constituents such as silicon, manganese, chromium, molybdenum and vanadium, and also by heat-treatment, i. e. hardening with subsequent tempering. 4 Classification and designation 4.1 Classification All steels covered by this European Standard are classified as alloy special steels according to EN Designation Steel names For the steel grades covered by this European Standard, the steel names as given in the relevant tables are allocated in accordance with EN and CR Steel numbers For the steel grades covered by this European Standard, the steel numbers as given in the relevant tables are allocated in accordance with EN ) It may be agreed at the time of ordering, until these EURONORMS have been adopted as European Standard, that these EURONORMS or the corresponding national standards should be applied. 5