SIST EN 10089:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.LWarmgewalzte Stähle für vergütbare Federn - Technische LieferbedingungenAciers laminés a chaud pour ressorts trempés et revenus - Conditions techniques de livraisonHot-rolled steels for quenched and tempered springs - Technical delivery conditions77.140.25Vzmetna jeklaSpring steelsICS:Ta slovenski standard je istoveten z:EN 10089:2002SIST EN 10089:2003en01-april-2003SIST EN 10089:2003SLOVENSKI
STANDARD



SIST EN 10089:2003



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10089December 2002ICS 77.140.25English versionHot-rolled steels for quenched and tempered springs - Technicaldelivery conditionsAciers laminés à chaud pour ressorts trempés et revenus -Conditions techniques de livraisonWarmgewalzte Stähle für vergütbare Federn - TechnischeLieferbedingungenThis European Standard was approved by CEN on 1 November 2002.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 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 Management Centre has the same status as the officialversions.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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10089:2002 ESIST EN 10089:2003



EN 10089:2002 (E)2ContentspageForeword.31Scope.42Normative references.43Terms and definitions.54Classification and designation.54.1Classification.54.2Designation.55Information to be supplied by the purchaser.65.1Mandatory information.65.2Options.66Manufacturing process.76.1General.76.2Deoxidation.76.3Heat-treatment and surface condition at delivery.77Requirements.77.1Chemical composition, hardness and hardenability.77.2Shearability.87.3Structure.87.4Internal soundness.87.5Surface quality and decarburisation.87.6Dimensions, tolerances on dimensions and shape.88Inspection and testing.88.1Types and contents of inspection documents.88.2Specific inspection and testing.99Marking.10Annex A (normative)
Supplementary or special requirements.29A.1Content of non-metallic inclusions.29A.2Non-destructive testing.29A.3Product analysis.29A.4Special agreements for marking.29Annex B (informative)
Maximum dimensions for rounds and flats based on the
100% hardenabilityscatterband (see Table 7).30Annex C (informative)
Dimensional standards applicable to products complying with
this EuropeanStandard.31Annex D (informative)
Guidance values for the mechanical properties of quenched and tempered testpieces (maximum dimensions as given in Table 5).32Bibliography.33SIST EN 10089:2003



EN 10089:2002 (E)3ForewordThis document (EN 10089:2002) has been prepared by Technical Committee ECISS/TC 23, "Steels for heattreatment, 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 orby endorsement, at the latest by June 2003, and conflicting national standards shall be withdrawn at the latest byJune 2003.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 followingcountries 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.SIST EN 10089:2003



EN 10089:2002 (E)41 Scope1.1This European Standard specifies the technical delivery requirements for round and flat bars, ribbed andgrooved bars and rod manufactured from the alloy steels listed in Table 3, intended for hot-formed andsubsequently heat-treated springs or cold-formed and subsequently heat-treated springs. The products aresupplied in one of the heat-treatment conditions given for the different types of products in Table 1, lines 2 to 6, andin one of the surface conditions given in Table 2.1.2In special cases, variations in these technical delivery requirements or additions to them may form thesubject of an agreement at the time of enquiry and order (see annex A).1.3In addition to the specifications of this European Standard, the general technical delivery requirements ofEN 10021 are applicable.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication 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 10027-1, Designation systems for steel — Part 1: Steel names, principal symbols.EN 10027-2, 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 mechanicaltesting (ISO 377:1997).EN ISO 642, Steel — Hardenability test by end quenching (Jominy test) (ISO 642:1999).EN ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1:1999).EN ISO 6508-1, Metallic materials — Rockwell hardness test - Part 1: Test method (scales A, B, C, D, E, F, G, H,K, N, T)(ISO 6508-1:1999).EN ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemicalcomposition (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.SIST EN 10089:2003



EN 10089:2002 (E)5EURONORM 1031), Microscopic determination of the ferritic or austenitic grain size of steels.EURONORM 1041), Determination of the depth of decarburization of non-alloy and low alloy structural steels.3 Terms and definitionsFor the purposes of this European Standard, the following term and definition apply in addition to the terms anddefinitions given in EN 10020, EN 10052, EN 10079, EN ISO 377 and EN ISO 14284.3.1spring steelsmaterials which are, because of their properties in the quenched and tempered condition, particularly suitable forthe manufacture of spring like components of all kinds. The resilience of the steels depends on their elasticdeformability, which enables them to sustain loading within a given range without exhibiting any permanentdeformation when the load is removed. The properties required of the steels for springs are obtained by highercarbon contents and alloying constituents such as silicon, manganese, chromium, molybdenum and vanadium, andalso by heat-treatment, i. e. hardening with subsequent tempering.4 Classification and designation4.1 ClassificationAll steels covered by this European Standard are classified as alloy special steels according to EN 10020.4.2 Designation4.2.1 Steel namesFor the steel grades covered by this European Standard, the steel names as given in the relevant tables areallocated in accordance with EN 10027-1 and CR 10260.4.2.2 Steel numbersFor the steel grades covered by this European Standard, the steel numbers as given in the relevant tables areallocated in accordance with EN 10027-2.
1)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.SIST EN 10089:2003



EN 10089:2002 (E)65 Information to be supplied by the purchaser5.1 Mandatory informationThe following information shall be supplied by the purchaser at the time of enquiry and order:a) the quantity to be delivered;b) the designation of the product form (e. g. round or square);c) the number of the dimensional standard;d) the dimensions and tolerances on dimensions and shape and, if applicable, letters denoting relevant specialtolerances;e) the number of this European Standard (EN 10089);f) steel name or steel number (see 4.2);g) if appropriate, the symbol for the heat treatment condition at delivery (see 6.3.1, 6.3.2 and Table 1);h) if appropriate, the symbol for the surface condition at delivery (see 6.3.3 and Table 2);i) if required, the type of inspection document in accordance with EN 10204 (see 8.1).EXAMPLE20 rounds prEN 10060 - 20 ´ 8000EN 10089 - 51CrV4+AEN 10204 - 3.1.Bor20 rounds prEN 10060 - 20 ´ 8000EN 10089 - 1.8159+AEN 10204 - 3.1.B5.2 OptionsA number of options are specified in this European Standard and listed below. If the purchaser does not indicatehis wish to implement one of these options, the supplier shall supply in accordance with the basis specification ofthis European Standard (see 5.1).a) any requirement concerning grain size (see 7.3 and 8.2.3);b) any requirement concerning non-metallic inclusion content (see 7.3.2 and clause A.1);c) any requirement for internal soundness (see 7.4 and clause A.2);d) any requirement relating to surface quality (see 7.5.2);e) any requirement relating to removal of surface defects (see 7.5.4);f) any requirement concerning special marking of the products (see clauses 9 and A.4);g) any verification of the product analysis (see Table 10 and clause A.3).SIST EN 10089:2003



EN 10089:2002 (E)76 Manufacturing process6.1 GeneralThe manufacturing process of the steel and of the products is left to the discretion of the manufacturer with therestrictions given by the requirements in 6.2 and 6.3.6.2 DeoxidationAll steels shall be fully killed.6.3 Heat-treatment and surface condition at delivery6.3.1 Normal condition at deliveryUnless otherwise agreed at the time of enquiry and order, the products shall be delivered in the untreated, i. e. asrolled, condition.6.3.2 Particular heat-treatment conditionIf so agreed at the time of enquiry and order, the products shall be delivered in one of the heat-treatment conditionsgiven in Table 1, lines 3 to 6.6.3.3 Particular surface conditionIf so agreed at the time of enquiry and order, the products shall be delivered in one of the particular surfaceconditions given in Table 2, lines 3 to 6.6.3.4 Cast separationThe steels shall be delivered separated by casts.7 Requirements7.1 Chemical composition, hardness and hardenability7.1.1Table 1 gives a survey of combinations of usual heat-treatment conditions at delivery, product forms andrequirements according to Tables 3 to 8 (chemical composition, maximum dimensions for a minimum corehardness, hardenability, maximum hardness).7.1.2Where the steel is not ordered according to core hardness or restricted hardenability requirements, i. e.where the steel type designations of Table 3, Table 6 or Table 7 and not the designations given in Table 5 orTable 8 are applied, the requirements for chemical composition, hardenability and maximum hardness cited inTable 1, (column 5) apply as appropriate, for the particular heat-treatment condition.7.1.3Where the steel is, by using the designations given in Table 5, ordered according to core hardnessrequirements, the values of core hardenability given in Table 5 or Table B.1 apply, in addition to the requirementscited in Table 1, columns 5 (1) and 5 (2). In this case, the values of end-quench hardenability given in Table 7 orTable 8 are for guidance purposes only.NOTEThe maximum dimensions given in Table 5 correspond to the restricted hardenability scatterband according toTable 8. For smaller sizes (Table B.1) the normal hardenability scatterband according to Table 7 can be sufficient.7.1.4Where the steel is, by using the designations given in Table 8, ordered according to restricted hardenabilityrequirements, the values of restricted hardenability given in Table 8 apply, in addition to the requirements cited inTable 1, columns 5 (1) and 5 (2).SIST EN 10089:2003



EN 10089:2002 (E)87.2 ShearabilityUnder suitable shearing conditions (avoiding local stress peaks, preheating, application of blades with a profileadapted to that of the product, etc.) all steels are normally shearable in the as-rolled condition (+AR), except inabnormal circumstances where it may be necessary to supply in conditions +S or +A (see Table 6).7.3 Structure7.3.1The steel, when tested in accordance with one of the methods described in EURONORM 103 shall showan austenitic grain size of 6 or finer.7.3.2For the content of non-metallic inclusions, see A.1.7.4 Internal soundnessRequirements for internal soundness may be agreed upon at the time of enquiry and order, e.g. on the basis ofnon-destructive tests (see A.2).7.5 Surface quality and decarburisation7.5.1All products shall have a workmanlike finish.7.5.2At the time of enquiry and order, agreements may be made with regard to the required surface quality.In the case of hot-rolled round bars and rods, such agreements shall be based on the requirements of EN 10221.7.5.3The values for the admissible partial surface decarburisation given in Table 9 apply for the as rolledcondition (+AR), for the treated to improve shearability condition (+S), for the soft annealed condition (+A) and forthe annealed to achieve spheroidization of the carbides condition (+AC) and for the testing conditions given in8.2.2.2.7.5.4Removal of surface discontinuities by welding is not permitted.If surface discontinuities are to be removed by other methods, the kind and permissible depth for removal ofsurface discontinuities should, where appropriate, be agreed upon at the time of enquiry and order.7.6 Dimensions, tolerances on dimensions and shapeThe nominal dimensions, tolerances on dimensions and shape for the product shall be agreed at the time ofenquiry and order, if possible, with reference to the dimensional standards applicable (see Annex C).8 Inspection and testing8.1 Types and contents of inspection documents8.1.1For each delivery, the issue of any inspection document according to EN 10204 may be agreed upon at thetime of enquiry and order.8.1.2If, in accordance with the agreements made at the time of enquiry and order, a test report is to be provided,this shall cover:a) the statement that the material complies with the requirements of the order;b) the results of the cast analysis for all elements specified for the type of steel supplied.8.1.3If, in accordance with the agreements in the order, an inspection certificate 3.1.A, 3.1.B or 3.1.C or aninspection report 3.2 (see EN 10204) is to be provided, the specific inspections and tests described in 8.2 shall becarried out and their results shall be certified in the document.SIST EN 10089:2003



EN 10089:2002 (E)9In addition the document shall covera) for all elements specified for the steel type concerned, the results of the cast analysis given by themanufacturer;b) the result of all inspections and tests ordered by supplementary requirements (according to Annex A);c) the symbol letters or numbers relating the inspection documents, the test pieces and products to each other.8.2 Specific inspection and testing8.2.1 Verification of the hardenability and hardness8.2.1.1For steels ordered with the designation given in Tables
7 or 8, unless otherwise agreed, only the end-quench hardenability requirements according to Tables 7 or 8 shall be verified.For steels ordered without end-quench hardenability requirements but with core hardness requirements, i. e. withthe symbol +CH in the designation, the hardness requirements given for the relevant heat-treatment condition inTable 1, column 5 (2) and the hardness requirements for core hardenability according to Table 5 shall be verified.8.2.1.2The amount of testing, the sampling conditions and the test methods to be applied for the verificationof the requirements shall be in accordance with the specifications in Table 10.8.2.2 Testing of the surface quality and decarburization8.2.2.1For rou
...