SIST EN 10151:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Federband aus nichtrostenden Stählen - Technische LieferbedingungenBandes pour ressorts en aciers inoxydables - Conditions techniques de livraisonStainless steel strip for springs - Technical delivery conditions77.140.25Vzmetna jeklaSpring steelsICS:Ta slovenski standard je istoveten z:EN 10151:2002SIST EN 10151:2003en01-april-2003SIST EN 10151:2003SLOVENSKI
STANDARD



SIST EN 10151:2003



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10151November 2002ICS 77.140.25English versionStainless steel strip for springs - Technical delivery conditionsBandes pour ressorts en aciers inoxydables - Conditionstechniques de livraisonFederband aus nichtrostenden Stählen - TechnischeLieferbedingungenThis European Standard was approved by CEN on 14 September 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 10151:2002 ESIST EN 10151:2003



EN 10151:2002 (E)2ContentspageForeword.31Scope.42Normative references.43Terms and definitions.54Classification and designation.54.1Classification.54.2Designation.54.2.1Steel names.54.2.2Steel numbers.55Information to be supplied by the purchaser.55.1Mandatory information.55.2Options.66Manufacturing process.76.1General.76.2Delivery.76.2.1Delivery form.76.2.2Delivery condition.77Requirements.77.1Chemical composition.77.2Mechanical properties.77.3Technological properties and surface condition.87.4Internal soundness.87.5Dimensions and tolerances on dimensions.88Inspection and testing.88.1General.88.2Types and contents of inspection documents.88.3Specific inspection and testing.98.3.1Extent of testing.98.3.2Selection and preparation of samples and test pieces.98.3.3Methods of test.99Disputes.10Annex A (informative)
Additional information.17A.1Selection of stainless steels for use in precision strip form for spring applications.17A.2Further details on ferritic steel X6Cr17 (1.4016).17A.3Further details on martensitic steels.18A.4Further details on precipitation hardening steel X7CrNiAl17-7 (1.4568).18A.5Further details on austenitic steels.18A.6Further general guidelines on processing.18A.6.1Physical properties.18A.6.2Cleaning and heat treatment.18A.6.3Mean surface roughness.19SIST EN 10151:2003



EN 10151:2002 (E)3ForewordThis document (EN 10151:2002) 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 May 2003, and conflicting national standards shall be withdrawn at the latest byMay 2003.Annex A is 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 10151:2003



EN 10151:2002 (E)41 Scope1.1This European Standard applies to cold rolled narrow strip of thicknesses up to and including 3 mm in rolledwidths less than 600 mm made from the stainless steel grades listed in Table 1. The steels are used in theconditions given in Table 4 for the production of springs and spring parts that are exposed to corrosive effects andsometimes slightly increased temperatures.1.2Other steel grades than those listed in Table 1, but covered by prEN 10088-2 can be supplied in the aboveconditions after agreement between supplier and customer (see also annex A).1.3The general technical delivery conditions specified in EN 10021 apply in addition to the specifications of thisEuropean Standard, unless otherwise specified in this European Standard.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).CR 10260, Designation systems for steels - Additional symbols.CR 10261, Iron and steel - Review of available methods of chemical analysis.EN 10002-1, Metallic materials - Tensile testing - Part 1: Method of test at ambient temperature.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.prEN 10088-2, Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resistingsteels for general and construction purposes.prEN 10168, Iron and steel products – Inspection documents – List of information and description.EN 10204, Metallic products - Types of inspection documents.EN 10258, Cold-rolled stainless steel narrow strip and cut lengths - Tolerances on dimensions and shape.EN ISO 377, Steel and steel products - Location and preparation of samples and test pieces for mechanical testing(ISO 377:1997).EN ISO 6507-1, Metallic materials – Vickers hardness test – Part 1: Test method (ISO 6507-1:1997).EN ISO 7438, Metallic materials – Bend test (ISO 7438:1985).ISO 14284, Steel and iron - Sampling and preparation of samples for the determination of chemical composition.SIST EN 10151:2003



EN 10151:2002 (E)53 Terms and definitionsFor the purposes of this European Standard, the following term and definition in addition to the terms and definitionsgiven in EN 10021, EN 10052, EN 10079, prEN 10088-2, EN ISO 377 and ISO 14284 applies.3.1 spoolstrip spirally wound onto a supporting centre. Strip on a spool can also be welded together end-to-end4 Classification and designation4.1 ClassificationSteels covered in this European Standard are classified according to their structure into:¾ ferritic steels;¾ martensitic steels;¾ precipitation hardening steels;¾ austenitic steels.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 and CR 10260.5 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. strip or cut length);c) the number of the dimensional standard (EN 10258);d) the dimensions and tolerances on thickness, width and length according to EN 10258 and, if applicable, lettersdenoting relevant special tolerances (see 7.5);e) the internal coil diameter according to EN 10258 (see 7.5);f) the number of this European Standard (EN 10151);g) steel name or steel number (see 4.2);SIST EN 10151:2003



EN 10151:2002 (E)6h) the delivery condition (see 6.2.2),i) the type of inspection document in accordance with EN 10204 (see 8.2).EXAMPLE5 tons narrow strip according to EN 10258 of nominal thickness 0,80 mm ordered with precision thickness tolerances (P),nominal width of 250 mm with precision tolerances on width (P) in steel X5CrNi18-10 (1.4301) in the cold worked condition+C850, process route 2H, as specified in this European Standard and an inspection certificate 3.1.B according to EN 10204.5 t narrow strip EN 10258-0,80Px250PSteel EN 10151-X5CrNi18-10+C850+2HEN 10204-3.1.Bor5 t narrow strip EN 10258-0,80Px250PSteel EN 10151-1.4301+C850+2HEN 10204-3.1.B5.2 OptionsA number of options are specified in this European Standard and listed below. If the purchaser does not indicate hiswish to implement one of these options, the supplier shall supply in accordance with the basis specification of thisEuropean Standard (see 5.1):a)any requirement concerning manufacturing process of the steel and of the products (see 6.1);b)any requirement concerning form of delivery (see 6.2.1.1);c)any requirement concerning condition of the edges (see 6.2.1.2);d)any requirement concerning special treatment conditions (see 6.2.2.1 and Table A.4);e)any requirement concerning special technological properties (see 7.3.1, Table 5 and 7.3.3);f)any requirement concerning surface finish (see 7.3.2);g)any requirement concerning bending limit of strip differing from Table 5 (see 7.3.1 and 8.3.3.2.2);h)any requirement concerning testing of internal soundness (see 7.4);i) any requirement concerning additional specific testing (see 8.1);j) any requirement concerning tensile testing for checking the uniformity of tensile strength (see 8.3.1 andTable 6);k) any requirement concerning determination of product analysis (see 8.3.2.2 and Table 6);l) any requirement concerning carrying out of bending ability tests (see 8.3.2.3 and Table 6);m) any requirement concerning tolerances on flatness, edge waviness and edge camber (see 8.3.3.3);n) any requirement concerning measurement of coil set including the relevant values (see 8.3.3.3).SIST EN 10151:2003



EN 10151:2002 (E)76 Manufacturing process6.1 GeneralUnless otherwise agreed at the time of enquiry and order, the steelmaking process and manufacturing process ofthe products are left to the discretion of the manufacturer.6.2 Delivery6.2.1 Delivery form6.2.1.1Strip is usually supplied in coils. Thin strip may be wound on a supporting centre, made of steel,cardboard or other material, in order to avoid the collapse of the centre. Strip may also be supplied as a spool (see3.1), in order to increase coil weight, whilst minimising coil outside diameter. In the latter case, any welds shall beclearly marked.Alternatively, strip may be supplied in cut lengths. These may be in a box, or on a pallet, and perhaps strappedtogether in bundles.Several coils, or bundles of cut lengths, may be assembled on a carrier.Unless otherwise agreed at the time of enquiry and order, the choice of delivery form is left to the discretion of themanufacturer.6.2.1.2Unless otherwise agreed at the time of enquiry and order, cold-rolled strip for springs is delivered withslit edges. By special agreement, strip can also be supplied with mill edges or with special edges, e.g. machinededges, deburred edges or edges dressed to produce a regular form, usually square or round.6.2.2 Delivery condition6.2.2.1The condition in which the strip is to be delivered shall always be specified by the purchaser.The delivery conditions possible are those given in Table 3 and Table 4.In special cases, products may, if this is agreed, also be delivered in the treatment conditions given in Table A.4which are normally reserved for finished springs.6.2.2.2In the condition +C, strip shall be delivered with a bright surface (2H), or a rough, matt surface (see7.3.2).Strip of steel types X20Cr13 (1.4021), X30Cr13 (1.4028), X39Cr13 (1.4031) and X7CrNiAl17-7 (1.4568) in theconditions “annnealed“ or “solution annealed“ may be delivered, at the manufacturer‘s choice, with a brightannealed (2R), pickled (2D), pickled and skin passed (2B) or matt (2F) surface according to prEN 10088-2.7 Requirements7.1 Chemical composition7.1.1The chemical composition requirements given in Table 1 apply in respect of the chemical compositionaccording to the cast analysis.7.1.2The product analysis may deviate from the limiting values for the cast analysis given in Table 1 by thevalues listed in Table 2.7.2 Mechanical properties7.2.1For the tensile strength of spring-hard rolled strip, the data in Table 3 and Table 4 apply.SIST EN 10151:2003



EN 10151:2002 (E)87.2.2Regardless of the mass of the coil and for spools (see 3.1) of mass 500 kg or less, the maximum differencein tensile strength between the two ends of a coil or spool shall be 100 MPa (see 8.3.1). For spools with massesabove 500 kg, the maximum difference in tensile strength shall be agreed at the time of enquiry and order.7.3 Technological properties and surface condition7.3.1The strip shall have adequate bending ability. Unless otherwise agreed, the guidance data given in Table 5apply. Cracks visible with the naked eye are not permitted.7.3.2The surface of the strip shall be one of those mentioned in 6.2.2 and defined in prEN 10088-2. Oil films fromcold-rolling are permitted. Pits, grooves, scars and scratches are only permitted to the extent that they do not impairthe performance of the spring. See also A.6.3.7.3.3If, for strip which is intended for high-duty springs, the requirements according to 7.3.1 and 7.3.2 are notsufficient, particular agreements shall be made at the time of enquiry and order.7.4 Internal soundnessThe products shall be free from internal defects that could impair their application to a significant extent. Testsappropriate for an assessment of the internal characteristics may be agreed upon at the time of enquiry and order.7.5 Dimensions and tolerances on dimensionsThe tolerances on thickness, width and length shall be specified in accordance with EN 10258.The internal coil diameter shall be agreed in accordance with EN 10258.8 Inspection and testing8.1 GeneralThe manufacturer shall carry out appropriate process control, inspection and testing to assure himself that thedelivery complies with the requirements of the order.This includes the following:¾ a suitable frequency of verification of the dimensions of the products;¾ an adequate intensity of visual examination of the surface quality of the products;¾ an appropriate frequency and type of test to ensure that the correct grade of steel is used.The nature and frequency of these verifications, examinations and tests are determined by the manufacturer, in thelight of the degree of consistency that has been determined by the evidence of the quality system. In view of this,verifications by specific tests for these requirements are not necessary unless otherwise agreed.8.2 Types and contents of inspection documents8.2.1At the time of enquiry and order, the issue of one of the inspection documents in accordance with EN 10204shall be agreed for each delivery.8.2.2If the issuing of an inspection certificate 3.1.A, 3.1.B or 3.1.C according to EN 10204 or of an inspectionreport 3.2 according to EN 10204 has been agreed, specific inspections according to 8.3 are to be carried out andthe following information shall be given in the inspection document with the code numbers and details required byprEN 10168:a) the information groups A, B and Z of prEN 10168;SIST EN 10151:2003



EN 10151:2002 (E)9b) the results of the cast analysis in accordance with the code numbers C71 to C92 in prEN 10168;c) the results of the mandatory tests marked in the second column of Table 6 by an 'm';d) the result of any optional test or inspections agreed at the time of enquiry and order.8.3 Specific inspection and testing8.3.1 Extent of testingThe data in Table 6 apply for the composition of test units and for the number of tests per test unit, subject to thefollowing exception for tensile strength:If proof of uniformity of tensile strength (in accordance with 7.2.2) is agreed upon at the time of enquiry and order, atest piece shall be taken from both ends of each coil or spool (see 3.1). If, from one coil of hot-rolled or cold rolledmaterial, several coils or spools of cold-rolled strip are produced and if these are numbered in sequence, it is onlynecessary to take a test piece from the beginning of each consecutively produced coil or spool.8.3.2 Selection and preparation of samples and test pieces8.3.2.1 GeneralThe general conditions given in ISO 14284 and EN ISO 377 for the selection and preparation of samples and testpieces shall apply.8.3.2.2 Product analysisFor product analysis, the selection and preparation of samples shall be carried out in conformity with therequirements of ISO 14284.8.3.2.3 Tensile and bending testsThe test pieces for the tensile test and the bending test shall be taken in accordance with Figure 2 and prepared inaccordance with EN 10002-1 and 8.3.3.2.2 respectively.8.3.3 Methods of test8.3.3.1 Chemical analysisIn cases of dispute, the reference method used for chemical analysis shall be in accordance with one of theEuropean Standards listed in CR 10261.8.3.3.2 Tensile and bending tests8.3.3.2.1The tensile test shall be carried out in accordance with EN 10002-1.8.3.3.2.2By analogy with the process of spring manufacture, to check the bending ability, a test strip, if possible20 mm in width, is bent through 90° under a press around a mandrel with a radius matched to the thickness of thetest piece (see Table 5). Bending is carried out perpendicularly to the longitudinal axis of the test piece, i.e.transverse to the direction of rolling in the case of longitudinal test pieces and parallel to the direction of rolling in thecase of transverse test pieces.In addition, the general specifications in EN ISO 7438 apply.SIST EN 10151:2003



EN 10151:2002 (E)108.3.3.3 Tolerances on shapeThe methods of testing flatness, edge waviness and edge camber and their tolerances may be agreed at the time ofenquiry and order.The measurement of coil set may be agreed at the time of enquiry and order. If agreed, the relevant values for thecoil set, measured as the deflection a (see Figure 1), shall also be specified at the time of enquiry and order.9 DisputesThe conditions for dealing with complaints laid down in EN 10021 shall apply.Dimensions in millimetresKey1
Holder2
Strip3
Scale4
StandFigure 1 — Coil set, measured as the deflection a, for a test length of 300 mmSIST EN 10151:2003



EN 10151:2002 (E)11Dimensions in millimetresKeyA
Bending test piece, as far as possible with a width of 20 mmB
Longitudinal test piece for bending transverse to rolling directionC
Transverse test piece for bending parallel to rolling directionX
In cases of dispute, the samples shall be taken at a distance of at least one lap from the inner or outer end of thecoilZ
Tensile test piece, a test piece having a gauge length of Lo = 80 mm and a width of 20 mm, or Lo = 50 mm and awidth of 12,5 mm as specified in EN 10002-1. Also, for b > 200 mm, transverse test pieces may be used1
Rolling direction2
Outer strip edgeb
Strip widthFigure 2 — Test piecesSIST EN 10151:2003



EN 10151:2002 (E)12Table 1 — Chemical composition (cast analysis)a of the steelsSteel designation% by massNameNumberCSiMnPmax.Smax.NCrMoNiOthersFerritic steelX6Cr171.4016max. 0,08max.1,00max. 1,000,0400,01516,0 to 18,0Martensitic steelsX20Cr131.40210,16 to 0,25max. 1,00max. 1,500,0400,01512,0 to 14,0X30Cr131.40280,26 to 0,35max. 1,00max. 1,500,0400,01512,0 to 14,0X39Cr131.40310,36 to 0,42max. 1,00max. 1,000,0400,01512,5 to 14,5Precipitation hardening steelX7CrNiAl17-71.4568max. 0,09max. 0,70max. 1,000,0400,01516,0 to 18,06,5 to 7,8Al:0,70 to 1,50Austenitic steelsX10CrNi18-81.43100,05 to 0,15max. 2,00max. 2,000,0450,015max. 0,1116,0 to 19,0max. 0,806,0 to 9,5X5CrNi18-101.4301max. 0,07max. 1,00max. 2,000,0450,015max. 0,1117,5 to 19,58,0 to 10,5X5CrNiMo17-12-21.4401max. 0,07bmax. 1,00max. 2,000,0450,015max. 0,1116,5 to 18,52,00 to 2,50b10,0 to 13,0bX11CrNiMnN19-8-61.43690,07 to 0,150,50 to 1,005,0 to 7,50,0300,0150,20 to 0,3017,5 to 19,56,5 to 8,5X12CrMnNiN17-7-51.4372max. 0,15max. 1,005,5 to 7,50,0450,0150,05 to 0,2516,0 to 18,03,5 to 5,5aElements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate precautions shall be taken to avoidthe addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the steel.bWhere the corrosion resistance is of particular importance, one can also agree the delivery of steel grade X3CrNiMo17-13-3 (1.4436) of prEN 10088-2 with the specifications of this EuropeanStandard applicable for steel grade X5CrNiMo17-12-2 (1.4401).SIST EN 10151:2003



EN 10151:2002 (E)13Table 2 — Permissible product analysis tolerances on the limiting values given in Table 1 for the castanalysisElementSpecified limits, cast analysis% by massPermissible tolerancea% by massCarbon> 0,030> 0,20+ 0,005± 0,01± 0,02Silicon> 1,00+ 0,05+ 0,10Manganese> 1,00> 2,00+ 0,03+ 0,04± 0,10Phosphorus+ 0,005Sulfur+ 0,003Nitrogen± 0,01Aluminium± 0,10Chromium± 0,15± 0,20Molybdenum< 1,75+ 0,05± 0,10Nickel> 5,0> 10,0- 0,07± 0,10± 0,15aIf several product analyses are carried out on one cast, and the contents of an individual elementdetermined lies outside the permissible range of the chemical composition specified for the cast analysis, then itis only allowed to exceed the permissible maximum value or to fall short of the permissible minimum value, butnot both for one cast.SIST EN 10151:2003



EN 10151:2002 (E)14Table 3 — Tensile strength levels in the cold worked conditionDesignationTensile strength a,bMPa*)+C700700 to 850+C850850 to 1 000+C10001 000 to 1 150+C11501 150 to 1 300+C13001 300 to 1 500+C15001 500 to 1 700+C17001 700 to 1 900+C19001 900 to 2 200aIntermediate tensile strength values may be agreed. Alternatively, thesteels may be specified in terms of minimum 0,2% proof strength or hardness,but only one parameter can be specified in one order (see Tables A.3 andA.6).bThe maximum available thickness for each tensile strength level and theremaining elongation decrease with the increase in tensile strength. Both aredepending on the work hardening behaviour of the steel and the cold workingconditions. Consequently, more exact information may be requested from themanufacturer.*)1MPa = 1 N/mm2Table 4 — Availability of steel grades in the cold worked conditionSteel designationAvailable tensile strength levelsNameNumber+C700+C850+C1000+C1150+C1300+C1500+C1700+C1900Ferritic steelX6Cr171.4016xx------Martensitic steelsX20Cr13a1.4021axx------X30Cr13a1.4028axx------X39Cr13a1.4031axx------Precipitation hardening steelX7CrNiAl17-7b1.4568b--xxxxx-Austenitic steelsX10CrNi18-81.4310-xxxxxxxX5CrNi18-101.4301xxxxx---X5CrNiMo17-12-21.4401xxxxx---X11CrNiMnN19-8-61.4369-xxxxxc--X12CrMnNiN17-7-51.4372-xxxxx--aAlso available in the annealed condition, with tensile strength ranges, Rm, as follows: X20Cr13: 500 MPa to 700 MPa; X30Cr13:
540 MPa to 740 MPa; X39Cr13: 560 MPa to 760 MPa and in the quenched and tempered condition (see Figures A.4 to A.6 and Table A.6).bAlso available in the solution annealed condition with the tensile strength range (Rm) of 800 MPa to 1000 MPa.cStrip with tensile strength up to +C1500 can be supplied depending on requested thickness.SIST EN 10151:2003



EN 10151:2002 (E)15Table 5 — Data for the bending ability a,b of stripSteel designationBending ability for a strip, thickness in millimetres> 0,05 to 0,25above 0,25 to 0,50above 0,50 to 0,75above 0,75 to 1,00cFor a direction of the axis of bendNameNumberDeliveryconditiontransverselongitudinaldtransverselongitudinaldtransverselongitudinaldtransverselongitudinaldPrecipitation hardening steelX7CrNiAl17-71.4568+C1150+C1300+C1500+C17003,0Austenitic steelsX5CrNi18-101.4301+C700+C850+C1000+C1150+C1300X10CrNi18-8 andX12CrMnNiN17-7-51.43101.4372+C850+C1000+C1150+C1300+C1500+C1700e+C1900e-< 3,0-----X5CrNiMo17-12-21.4401+C700+C850+C1000+C1150+C1300------X11CrNiMnN19-8-61.4369+C1150+C1300+C15009,0aBending ability r/t (r = mandrel radius, t= strip thickness) at an angle of 90°.bSpecifi
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