1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 10270-3:2011Steel wire for mechanicalspringsPart 3: Stainless spring steel wireBS EN 10270-3:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implement
2、ation of EN 10270-3:2011.It supersedes BS EN 10270-3:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/106, Wire Rod and Wire.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does n
3、ot purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 62760 6ICS 77.140.25Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the
4、Standards Policy and Strategy Committee on 30 November 2011.Amendments issued since publicationDate Text affectedBS EN 10270-3:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10270-3 October 2011 ICS 77.140.25; 77.140.65 Supersedes EN 10270-3:2001English Version Steel wire for mechanical sp
5、rings - Part 3: Stainless spring steel wire Fils en acier pour ressorts mcaniques - Partie 3: Fils en acier inoxydable Stahldraht fr Federn - Teil 3: Nichtrostender Federstahldraht This European Standard was approved by CEN on 10 September 2011. CEN members are bound to comply with the CEN/CENELEC I
6、nternal 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 CEN-CENELEC Management Centre or to
7、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 CEN-CENELEC Management Centre has the same status as the official
8、 versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovaki
9、a, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide fo
10、r CEN national Members. Ref. No. EN 10270-3:2011: EBS EN 10270-3:2011EN 10270-3:2011 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Information to be supplied by the purchaser .44 Requirements .54.1 Manufacturing process .54.2 Form of delivery .54.3 Surface finish .54.4 Chemical co
11、mposition 54.5 Mechanical properties .64.6 Technological properties 84.7 Supply conditions of wire on coils/reels and spools .84.8 Surface quality 104.9 Inner soundness . 104.10 Dimensions and dimensional tolerances . 105 Testing and inspection . 125.1 Inspection and inspection documents . 125.2 Ext
12、ent of testing for specific testing. 125.3 Sampling 145.4 Test methods . 145.5 Retests . 156 Marking and packaging 15Annex A (informative) Additional information . 16A.1 Indications for classification of steel grades . 16A.2 Alteration of tensile strength by heat treatment 17A.3 Physical properties
13、. 17A.4 Magnetic properties 17A.5 Guidelines for processing and heat treatment . 17Annex B (informative) Cross reference of steel grade designations 21Bibliography . 22BS EN 10270-3:2011EN 10270-3:2011 (E) 3 Foreword This document (EN 10270-3:2011) has been prepared by Technical Committee ECISS/TC 1
14、06 “Wire rod and wires”, the secretariat of which is held by AFNOR. 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 April 2012, and conflicting national standards shall be withdrawn at the latest
15、by April 2012. 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 10270-3:2001. This European Standard for st
16、eel wire for mechanical springs is composed of the following parts: Part 1: Patented cold drawn unalloyed spring steel wire; Part 2: Oil hardened and tempered spring steel wire; Part 3: Stainless spring steel wire. According to the CEN/CENELEC Internal Regulations, the national standards organizatio
17、ns of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
18、 Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 10270-3:2011EN 10270-3:2011 (E) 4 1 Scope 1.1 This European Standard 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
19、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.
20、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 according to this standard; in this case the pa
21、rties should agree upon the required mechanical characteristics. 1.3 In addition to this European Standard the general technical delivery requirements of EN 10021 are applicable. 2 Normative references The following referenced documents are indispensable for the application of this document. For dat
22、ed references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10021, General technical delivery conditions for steel products EN 10027-1:2005, Designation systems for steels Part 1: Steel names EN 10027-2:1
23、992, Designation systems for steels Part 2: Numerical system EN 10088-3, Stainless steels Part 3: Technical delivery conditions for semi-finished products, bars, rods and sections for general purposes EN 10204:2004, Metallic products Types of inspection documents EN 10218-1, Steel wire and wire prod
24、ucts General Part 1: Test methods EN 10218-2, Steel wire and wire products General Part 2: Wire dimensions and tolerances CEN/TR 10261, Iron and steel Review of available methods of chemical analysis EN ISO 377, Steel and steel products Location and preparation of samples and test pieces for mechani
25、cal testing (ISO 377:1997) EN ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature (ISO 6892-1:2009) EN ISO 14284, Steel and iron Sampling and preparation of samples for the determination of chemical composition (ISO 14284:1996) 3 Information to be supplied by th
26、e purchaser The purchaser shall clearly state in his enquiry or order the product and following information: a) the desired quantity; BS EN 10270-3:2011EN 10270-3:2011 (E) 5 b) the term spring steel wire or straightened and cut lengths; c) the number of this European Standard: EN 10270-3; d) the ste
27、el grade (see Table 1) and for grade 1.4301, 1.4310 and 1.4462 also the tensile strength level (see Table 2); e) the nominal wire diameter (see Table 4) and for cut length the length and the length tolerance class (see Table 6); f) the surface finish (see 4.3, i.e. coating); g) the form of delivery
28、(see 4.2); h) the type of inspection document to be supplied (see 5.1); i) any particular agreement made. EXAMPLE 2 t stainless steel spring wire according to this standard, grade 1.4310, normal tensile strength level and nominal diameter 2,50 mm, nickel coated in coils with inspection document 3.1
29、according to EN 10204:2004: 2 t spring steel wire EN 10270-3 1.4310-NS 2,50 - Ni-coated in coils, EN 10204:2004 3.1 4 Requirements 4.1 Manufacturing process Unless otherwise agreed in the order, the manufacturing process used in the making of the stainless steel wire is left to the discretion of the
30、 manufacturer. The starting condition (+AT: solution annealed) of the wire (rod) is specified in EN 10088-3. 4.2 Form of delivery The wire shall be supplied in coils, on spools, on spoolless cores or carriers. Several coils may be assembled on a carrier. Unless otherwise specified the form of delive
31、ry shall be at the manufacturers discretion. They shall however inform the purchaser about the form of delivery. The delivery requirements are specified in 4.7. Wire in straight lengths is normally supplied in bundles. 4.3 Surface finish The wire may be coated or not. The specific coating and finish
32、 for stainless steel spring wire shall be agreed upon at the time of enquiry and order - e.g. uncoated, polished finish, nickel coated. 4.4 Chemical composition 4.4.1 The requirements for the chemical composition given in Table 1 apply to the heat analysis. 4.4.2 The permissible deviation of the pro
33、duct analysis from the values specified in Table 1 shall be in accordance with the provision in EN 10088-3. For a single heat the deviation of an element in the product analysis may be only below the minimum or only above the maximum value of the range specified for the heat analysis, but not both a
34、t the same time. BS EN 10270-3:2011EN 10270-3:2011 (E) 6 Table 1 Chemical composition Heat analysisa(% by mass) Steel grade C Si Mn P S Cr Mo Ni Other elements max. max. max. max. NamebNumber bX10CrNi18-81.43100,05 to 0,15 2,00 2,00 0,045 0,015 16,0 to 19,0 0,80 6,0 to 9,5 N 0,11 X5CrNiMo17-12-21.44
35、01 c 0,07 1,00 2,00 0,045 0,015 16,5 to 18,5 2,00 to 2,50 10,0 to 13,0 N 0,11 X7CrNiAl17-71.4568 d 0,09 0,70 1,00 0,040 0,015 16,0 to 18,0 - 6,5 to 7,8 Al: 0,70 to 1,50 X5CrNi18-10 1.4301 0,07 1,00 2,00 0,045 0,015 17,5 to 19,5 - 8,0 to 10,5 N 0,11 X1NiCrMoCu25-20-51.4539 0,020 0,70 2,00 0,030 0,010
36、 19,0 to 21,0 4,0 to 5,0 24,0 to 26,0 N 0,15 Cu: 1,20 to 2,00 X2CrNiMoN22-5-31.4462 e 0,030 1,00 2,00 0,035 0,015 21,0 to 23,0 2, 50 to 3,5 4,5 to 6,5 N: 0,10 to 0,22 aAlternative compositions may be used by agreement. b“Name“ and “Number“ are derived in accordance with EN 10027-1 and -2 respectivel
37、y. cSteel 1.4436 may be used to provide increased corrosion resistance compared with 1.4401, with the specification of this part of EN 10270 applicable for steel 1.4401. dFor better cold formability the upper limit of nickel content may be increased up to 8,30 %. e Duplex grades. 4.5 Mechanical prop
38、erties 4.5.1 For the tensile strength in the as drawn condition the data of Table 2 shall apply. BS EN 10270-3:2011EN 10270-3:2011 (E) 7 Table 2 Tensile strength in the drawn condition Tensile strength (MPa) a b c d e f for the following steel grades 1.4310 1.4401 1.4568 1.4301 1.4539 1.4462 Nominal
39、 diameter mm gNormal tensile strength (NS) - High tensile strength (HS) - min. max. min. max. Normal tensile strength (NS) min. High tensile strength (HS) min. max. min. max. Normal tensile strength (NS) - High tensile strength (HS) - min. max. min. max. min. max. min. max. d 0,20 2 200 2 530 2 350
40、2 710 1 725 1 990 1 975 2 280 2 000 2150 2 300 1 600 1 840 2 150 2 480 2 370 2 730 0,20 3 mm o 5.4.5 4.6.3 6 Wire cast characteristics All m 10 % c1 1 5.4.7 4.7.34.7.47 Testing for surface quality All o To be agreed at the order 5.4.6 4.8 8 Check on dimensions All m 100 % 1 1 EN 10218-2 4.10 a m (=
41、mandatory): the test is to be carried out in each case / o (= optional): the test is carried out only if so agreed at the time of ordering.bThe results of the cast analysis for the elements listed in Table 1 for the grade concerned shall be notified to the customer in all cases.c10 % of the wire uni
42、ts in the production batch, at least 2 but no more than 10 coils/reels or spools.dA production batch is defined as a quantity of production originating from the same cast, which has been subjected to the same conditions of heat treatment, and with the same reduction in cross-section and with the sam
43、e surface finish.BS EN 10270-3:2011EN 10270-3:2011 (E) 14 5.3 Sampling Sampling and testing preparation shall be in accordance with EN ISO 377 and EN ISO 14284. Samples shall be taken at the end of the coils, reels or spools or at random for wire in the form of straightened and cut lengths. Table 7/
44、column 8 gives further details. 5.4 Test methods 5.4.1 Chemical composition Unless otherwise agreed at the time of ordering the choice of a suitable physical or chemical method of analysis for the determination of product analysis shall be at the discretion of the supplier. In cases of dispute the a
45、nalysis shall be carried out by a laboratory approved by the two parties. The method of analysis to be applied shall be agreed upon, where possible in accordance with CEN/TR 10261. 5.4.2 Tensile test The tensile test shall be carried out according to EN ISO 6892-1, on samples with the full cross-sec
46、tion of the wire. For the calculation of the tensile strength the actual cross-section based on the actual wire diameter is applied. 5.4.3 Coiling test The coiling test shall be carried out in the following manner: A test piece - approximately 500 mm in length - shall be closely wound, under slight
47、but reasonably uniform tension on a mandrel three to three and a half times the nominal diameter. The mandrel diameter shall however be at least 1,00 mm. The close coil shall be stretched so that after releasing the stress it sets to approx. three times its original length. The surface condition of
48、the wire and the regularity of the spring pitch and individual windings shall be inspected with the test piece in this condition. 5.4.4 Wrapping test The wrapping test for ductility shall be carried out according to EN 10218-1. The wire shall be wrapped 8 turns around a mandrel with a diameter equal
49、 to the wire diameter. 5.4.5 Simple bend test For the bend test a wire sample of sufficient length shall be bent in U form around a mandrel with a diameter equal to twice the wire diameter for sizes above 3,00 mm to 6,50 mm and equal to three times the wire diameter for sizes above 6,50 mm. For practical reasons the wire shall be deemed to have met the requirements of this standard if it withstands bending around a mandrel smaller than the one specified.
