SIST EN 10270-3:2002
(Main)Steel wire for mechanical springs - Part 3: Stainless spring steel wire
Steel wire for mechanical springs - Part 3: Stainless spring steel wire
1.1 This Part of EN 10270 applies to the grades of stainless steels listed in Table 1, which are usually used in the cold drawn condition in the form of wire of circular cross-section up to 10,00 mm in diameter, for the production of springs and spring parts that are exposed to corrosive effects and sometimes to slightly increased temperatures (see A.1).
1.2 In addition to the steels listed in Table 1 certain of the steel grades covered by EN 10088-3 e.g.1.4571, 1.4539, 1.4028 are also used for springs, although to much lesser extent. In these cases the mechanical properties (tensile strength, etc.) should be agreed between purchaser and supplier. Similarly, diameters between 10,00 mm and 15,00 mm may be ordered against this standard; in this case the parties should agree upon the required mechanical characteristics.
1.3 In addition to this part of EN 10270 the general technical delivery requirements of EN 10021 are applicable.
Stahldraht für Federn - Teil 3: Nicht rostender Federstahldraht
Anwendungsbereich
1.1 Dieser Teil von EN 10270 gilt für die nicht rostenden Stähle nach Tabelle 1, die üblicherweise im
kaltgezogenen Zustand in Form von Draht mit kreisförmigem Querschnitt bis 10,00 mm Durchmesser für die
Fertigung von Federn und federnden Teilen, die Korrosionseinflüssen und mitunter leicht erhöhten Temperaturen
(siehe A.1) ausgesetzt sind, verwendet werden.
1.2 Außer den Stählen nach Tabelle 1 werden auch einige Sorten nach EN 10088-3, zum Beispiel 1.4571,
1.4539, 1.4028, für Federn verwendet, allerdings in wesentlich geringerem Umfang. In diesen Fällen sollten die
mechanischen Eigenschaften (Zugfestigkeit usw.) zwischen Besteller und Lieferer vereinbart werden. Ähnlich
können Durchmesser zwischen 10,00 mm und 15,00 mm nach dieser Norm bestellt werden; in diesem Falle
sollten die Beteiligten die benötigten mechanischen Eigenschaften vereinbaren.
1.3 Zusätzlich zu diesem Teil der EN 10270 gelten die allgemeinen technischen Lieferbedingungen nach
EN 10021.
Fils en acier pour ressorts mécaniques - Partie 3: Fils en acier inoxydable
Domaine d'application
1.1 La présente partie 3 de l'EN 10270 s'applique aux nuances d'acier inoxydable écrouies répertoriées au Tableau 1, qui sont habituellement utilisées a l'état tréfilé a froid sous forme de fils de section transversale circulaire d'un diametre pouvant atteindre 10 mm, destinés a la fabrication de ressorts et de parties de ressorts soumises a des effets corrosifs et parfois a des températures moyennement élevées (voir A.1)
1.2 Outre les aciers énumérés au Tableau 1, certaines des nuances d'acier couvertes par l'EN 10088-3, telles que 1.4571, 1.4539, 1.4028, etc., sont également utilisées dans une moindre mesure pour la fabrication de ressorts. Dans ces cas, les caractéristiques mécaniques (résistance a la traction, etc.) doivent faire l'objet d'un accord entre l'acheteur et le producteur.
De la meme maniere, il est possible de commander des fils ayant des diametres compris entre 10,00 mm et 15,00 mm, sur la base de la présente norme ; dans ce cas, les parties doivent s'entendre sur les caractéristiques mécaniques requises.
1.3 Les conditions générales techniques de livraison de l'EN 10021 s'ajoutent aux dispositions de la présente partie de l'EN 10270.
Jeklena žica za vzmeti - 3. del: Nerjavna jeklena žica za vzmeti
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Jeklena žica za vzmeti - 3. del: Nerjavna jeklena žica za vzmetiStahldraht für Federn - Teil 3: Nicht rostender FederstahldrahtFils en acier pour ressorts mécaniques - Partie 3: Fils en acier inoxydableSteel wire for mechanical springs - Part 3: Stainless spring steel wire77.140.65Jeklene žice, jeklene vrvi in verigeSteel wire, wire ropes and link chains77.140.25Vzmetna jeklaSpring steelsICS:Ta slovenski standard je istoveten z:EN 10270-3:2001SIST EN 10270-3:2002en01-september-2002SIST EN 10270-3:2002SLOVENSKI
STANDARD
SIST EN 10270-3:2002
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10270-3April 2001ICS 77.140.25; 77.140.65English versionSteel wire for mechanical springs - Part 3: Stainless spring steelwireFils en acier pour ressorts mécaniques - Partie 3: Fils enacier inoxydableStahldraht für Federn - Teil 3: NichtrostenderFederstahldrahtThis European Standard was approved by CEN on 19 February 2001.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, 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© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10270-3:2001 ESIST EN 10270-3:2002
Page 2EN 10270-3:2001ContentsForeword.31Scope.42Normative references.43Designation.54Information to be supplied by the purchaser.55Requirements.55.1Manufacturing process.55.2Form of delivery.55.3Surface finish.65.4Chemical composition.65.5Mechanical properties.85.6Technological properties.85.7Supply conditions of wire on coils/reels and spools.95.8Surface quality.105.9Inner soundness.105.10Dimensions and dimensional tolerances.116Testing and inspection.126.1Inspection and inspection documents.126.2Extent of testing for specific testing.126.3Sampling.146.4Test methods.146.5Retests.157Marking and packaging.15Annex A (informative)
Additional information.16Annex B (informative)
Cross reference of steel grade designations.21Bibliography.22SIST EN 10270-3:2002
Page 3EN 10270-3:2001ForewordThis European Standard has been prepared by Technical Committee ECISS/TC 30 "Steel wires ", thesecretariat of which is held by BSI.This European Standard shall be given the status of a national standard, either by publication of anidentical text or by endorsement, at the latest by October 2001, and conflicting national standardsshall be withdrawn at the latest by October 2001.This European Standard for steel wire for mechanical springs is composed of the following parts:Part 1 : Patented cold drawn unalloyed spring steel wirePart 2 : Oil hardened and tempered spring steel wirePart 3 : Stainless spring steel wireAccording to the CEN/CENELEC Internal Regulations, the national standards organizations of thefollowing countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 10270-3:2002
Page 4EN 10270-3:20011 Scope1.1This Part of EN 10270 applies to the grades of stainless steels listed in Table 1, which areusually used in the cold drawn condition in the form of wire of circular cross-section up to 10,00 mm indiameter, for the production of springs and spring parts that are exposed to corrosive effects andsometimes to slightly increased temperatures (see A.1).1.2In addition to the steels listed in Table 1 certain of the steel grades covered by EN 10088-3e.g.1.4571, 1.4539, 1.4028 are also used for springs, although to much lesser extent. In these casesthe mechanical properties (tensile strength, etc.) should be agreed between purchaser and supplier.Similarly, diameters between 10,00 mm and 15,00 mm may be ordered against this standard; in thiscase the parties should agree upon the required mechanical characteristics.1.3In addition to this part of EN 10270 the general technical delivery requirements of EN 10021 areapplicable.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from otherpublications. These normative references are cited at the appropriate places in the text and thepublications are listed hereafter. For dated references, subsequent amendments to or revisions of anyof these publications apply to this European Standard only when incorporated in it by amendment orrevision. For undated references the latest edition of the publication referred to applies (includingamendments).EN 10002-1, Metallic materials — Tensile test — Part 1 : Method of test (at ambient temperature)EN 10021, General technical delivery requirements for steel and iron productsEN 10027-1, Designation systems for steel — Part 1: Steel names, principal symbolsEN 10027-2, Designation systems for steel — Part 2: Steel numbersEN 10088-3, Stainless steels — Part 3: Technical delivery conditions for semi-finished products, bars,rods and sections for general purposes.EN 10204, Metallic products — Types of inspection documentsEN 10218-1, Steel wire and wire products — General — Part 1: Test methodsEN 10218-2, Steel wire and wire products — General — Part 2: Dimensions and tolerancesCR 10261, Iron and steel — Review of available methods of chemical analysisEN ISO 377, Steel and steel products — Location and preparation of samples and test pieces forMechanical testingISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemicalcompositionSIST EN 10270-3:2002
Page 5EN 10270-3:20013 DesignationFor products supplied according to this standard the designation shall state in the following order: the term spring wire or straightened and cut lengths; the number of this European standard: EN 10270-3; the steel grade, and where applicable the tensile strength level; the nominal wire diameter; the coating - if any.EXAMPLE: Standard designation of a stainless steel spring wire according to this standard - grade1.4310 - normal strength level and nominal diameter 2,50 mm, nickel coated :Spring wire EN 10270-3 - 1.4310 - NS - 2,50 Ni coated4 Information to be supplied by the purchaserThe purchaser shall clearly state in his enquiry or order the product and following information :a) the desired quantity;b) the number of this European Standard: EN 10270-3;c) the steel grade and for grade 1.4310 also the tensile strength level;d) the nominal wire diameter;e) the surface finish (see 5.3) ;f) the form of delivery (see 5.2);g) the type of inspection document (see 7.1) to be supplied;h) any particular agreement made.EXAMPLE: 2 t stainless spring steel wire EN 10270-3 - 1.4310 - NS - 2,50 nickel coated in coilsinspection document EN 10204 - 3.1.B5 Requirements5.1 Manufacturing processUnless otherwise agreed in the order, the manufacturing process used in the making of the stainlesssteel wire is left to the discretion of the manufacturer.
The starting condition (+AT : solution annealed)of the wire (rod) is specified in EN 10088-3.5.2 Form of deliveryThe wire shall be supplied in coils, on spools, on spoolless cores or carriers. Several coils may beassembled on a carrier. Unless otherwise specified the form of delivery shall be at the manufacturer’sdiscretion. He shall however inform the purchaser about the form of delivery.SIST EN 10270-3:2002
Page 6EN 10270-3:2001The delivery requirements are specified in 5.7.Wire in straight lengths is normally supplied in bundles.5.3 Surface finishThe wire may be coated or not. The specific coating and finish for stainless steel spring wire shall beagreed upon at the time of enquiry and order - e.g. uncoated, polished finish, nickel coated.5.4 Chemical composition5.4.1The requirements for the chemical composition given in Table 1 apply to the heat analysis.5.4.2 The permissible deviation of the product analysis from the values specified in Table 1 shall be inaccordance with the provision in EN 10088-3. For a single heat the deviation of an element in theproduct analysis may be only below the minimum or only above the maximum value of the rangespecified for the heat analysis, but not both at the same time.Table 1 — Chemical composition — Heat analysis (% by mass) aSteel gradeCSiMnPSCrMoNiothersmaxmax.max.max.NameNumberbbX10CrNi18-81.43100,052,002,000,0450,01516,00- 0,806,00-N:to 0,1519,009,500,11X5CrNiMo17-12-21.4401c 0,071,002,000,0450,01516,50-2,00-10,00-N:18,502,50c13,000,11X7CrNiAl17-71.4568 0,090,701,000,0400,01516,00-6,50-Al:18,007,800,70-d1,50a Alternative compositions may be used by agreement.b Names and numbers are derived in accordance with EN 10027 — Part 1 and Part 2 respectively.c Steel 1.4436 may be used to provide increased corrosion resistance compared with 1.4401, with thespecification of this part of EN 10270 applicable for steel 1.4401.d For better cold formability the upper limit may be increased to 8,30 %.SIST EN 10270-3:2002
Page 7EN 10270-3:2001Table 2 — Tensile strength in the drawn conditionTensile strength (MPa) a b c d e fSteel grade1.43101.44011.4568Nominal diameterNormal tensileHigh tensilemin.min.(mm) gstrength (NS)-min.strength (HS)-min.d
0,2022002350172519750,20 < d
0,3021502300170019500,30 < d
0,4021002250167519250,40 < d
0,5020502200165019000,50 < d
0,6520002150162518500,65 < d
0,8019502100160018250,80 < d
1,0019002050157518001,00 < d
1,2518502000155017501,25 < d
1,5018001950150017001,50 < d
1,7517501900145016501,75 < d
2,0017001850140016002,00 < d
2,5016501750135015502,50 < d
3,0016001700130015003,00 < d
3,5015501650125014503,50 < d
4,2515001600122514004,25 < d
5,0014501550120013505,00 < d
6,0014001500115013006,00 < d
7,0013501450112512507,00 < d
8,5013001400107512508,50 < d
10,001250135010501250a Tensile strength calculated on actual diameter.b The maximum tensile strength shall be the min. value plus 15 % of the minimum value.The range of tensile strength values within a production batch of the same heat shall be maximum9% of the minimum values in this table.c After straightening, the tensile strength may be reduced by up to 10 %.d When better formability is required, lower tensile strength values may be agreed upon.e The wire is supplied in the cold drawn condition. The tensile strength in the finished springmay be substantially influenced by a heat treatment; particularly precipitation hardening ofgrade 1.4568 results in substantially higher tensile strength (see A.5.2 and Table A.3).f 1 MPa = 1 N/mm2g Larger diameters may be specified in which case the parties shall agree the tensile strength at thetime of enquiry and order.SIST EN 10270-3:2002
Page 8EN 10270-3:20015.5 Mechanical properties5.5.1For the tensile strength in the as drawn condition the data of Table 2 shall apply.NOTE 1Grade 1.4310 can be delivered in normal tensile strength (NS) or high tensile strength (HS).NOTE 2For steel 1.4568 the characteristics of the springs are not only determined by the characteristics ofthe drawn wire but also by the heat-treatment of the spring (see A.2). Therefore the steel should be of suchquality so that by the heat treatment after drawing the mechanical properties are met.5.5.2In addition to the requirements of Table 2 the maximum tensile strength range within one unitpackage (individual coil, spool or reel,.) shall satisfy Table 3.For straightened and cut lengths the values of Table 3 apply for the individual bundles.Table 3 — Tensile strength range within an individual unit package(coil/spool/bundle)Wire diameter d (mm)Max. range (MPa)d
1,501001,50 < d
10,00705.6 Technological properties5.6.1 Coiling testFor evaluation of uniformity of coiling and surface condition the coiling test may be applied to wire witha diameter of 0,50 mm to 1,50 mm. The spring coiled in accordance with 6.4.3 shall show a defectfree surface condition without splits or fracture; the coil shall have uniform pitch of the turns and a fairdimensional regularity of its diameter.NOTEAlthough the usefulness of the coiling test is not generally recognized, it has been retained since itoffers the possibility of revealing internal stresses. If doubtful test results are obtained the wire concerned shouldnot be rejected immediately but efforts should be made by the parties concerned to elucidate the cause.5.6.2 Wrapping testThe wrapping test may be applied to wire with a diameter of 0,30 mm to 3,00 mm. The wire shall notshow any sign of cracks or surface imperfections when closely wrapped eight turns around a mandrelof a diameter equal to the wire size (see also 6.4.4).5.6.3 Bend testWhere requested, the bend test may be applied for wire with a diameter over 3,00 mm. The wire shallwithstand the test without any sign of failure.NOTEIn some applications the material is severely deformed by bending. Such is the case for extensionsprings with tight hooks, springs with bends on legs, spring wire forms, etc. In such cases the bend test providesfor a wire test very close to actual use.SIST EN 10270-3:2002
Page 9EN 10270-3:20015.7 Supply conditions of wire on coils/reels and spools5.7.1 GeneralThe wire of each coil shall consist of one single length of wire originating from only one heat. It shallbe wound so that there are no kinks.Where wire is delivered on spools, spoolless cores or carriers up to 10 % of those may consist of amaximum of two wire lengths.
The joints shall be properly made, suitably marked and labelle
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