1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 10270-1:2011Steel wire for mechanicalspringsPart 1: Patented cold drawn unalloyedspring steel wireBS EN 10270-1:2011 BRITISH STANDARDNational forewordThis British Standard
2、is the UK implementation of EN 10270-1:2011.It supersedes BS EN 10270-1:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/106, Wire Rod and Wire.A list of organizations represented on this committee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
3、 publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 62758 3ICS 77.140.25Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under t
4、he authority of theStandards Policy and Strategy Committee on 30 November 2011.Amendments issued since publicationDate Text affectedBS EN 10270-1:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10270-1 October 2011 ICS 77.140.25 Supersedes EN 10270-1:2001English Version Steel wire for mecha
5、nical springs - Part 1: Patented cold drawn unalloyed spring steel wire Fils en acier pour ressorts mcaniques - Partie 1 : Fils pour ressorts en acier non alli, patents, trfils froid Stahldraht fr Federn - Teil 1: Patentiert gezogener unlegierter Federstahldraht This European Standard was approved b
6、y CEN on 10 September 2011. 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 st
7、andards may be obtained on application to the CEN-CENELEC 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
8、 notified to the CEN-CENELEC Management Centre has the same status as the official 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, Lit
9、huania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, 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
10、 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10270-1:2011: EBS EN 10270-1:2011EN 10270-1:2011 (E) 2 Contents Page Foreword 41 Scope 52 Normative references 53 Terms and definitions .64 Classification 65 Information to be suppli
11、ed by the purchaser .66 Requirements .76.1 Material .76.1.1 General 76.1.2 Chemical composition 76.2 Form of delivery .76.3 Coating and surface finish 76.4 Mechanical properties .86.5 Technological properties . 146.5.1 Coiling test 146.5.2 Simple torsion test 146.5.3 Wrapping test 146.5.4 Simple ben
12、d test . 146.6 Supply conditions of wire on coils/reels and spools 156.6.1 General . 156.6.2 Coil size . 156.6.3 Cast of wire 156.6.4 Helix cast of wire. 156.6.5 Other tests for cast of wire 166.7 Surface quality 166.8 Dimensions and dimensional tolerances . 176.8.1 Dimensional tolerances . 176.8.2
13、Out of roundness 187 Testing and inspection . 197.1 Inspection and inspection documents . 197.2 Extent of testing for specific inspection 197.3 Sampling 197.4 Test methods . 197.4.1 Chemical composition . 197.4.2 Tensile test 197.4.3 Coiling test 197.4.4 Wrapping test 207.4.5 Simple torsion test 207
14、.4.6 Simple bend test . 207.4.7 Surface defects . 207.4.8 Decarburization . 207.4.9 Diameter . 207.4.10 Zinc and zinc/aluminium coating 217.4.11 Adherence of coating . 217.5 Retests . 218 Marking and packaging 21Annex A (informative) Additional information . 23BS EN 10270-1:2011EN 10270-1:2011 (E) 3
15、 A.1 Definition of surface condition of the wire . 23A.1.1 Drawing condition . 23A.1.2 Surface treatment 23A.1.3 Abbreviations . 23A.2 Physical characteristics at room temperature . 24A.2.1 Modulus of elasticity and shear modulus . 24A.2.2 Density 24A.3 Accuracy of measuring instruments . 24A.4 Tens
16、ile strength formula. 24A.5 Indication for the use of cold drawn spring steel wire 25BS EN 10270-1:2011EN 10270-1:2011 (E) 4 Foreword This document (EN 10270-1:2011) has been prepared by Technical Committee ECISS/TC 106 “Wire rod and wires”, the secretariat of which is held by AFNOR. This European S
17、tandard 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 by April 2012. Attention is drawn to the possibility that some of the elements of t
18、his 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 10270-1:2001. This European Standard for steel wire for mechanical springs is composed of the following parts: Part 1: Patente
19、d 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 organizations of the following countries are bound to implement this European Standard: Austri
20、a, 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, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS
21、 EN 10270-1:2011EN 10270-1:2011 (E) 5 1 Scope 1.1 This European Standard applies to patented cold drawn unalloyed steel wire of circular cross-section for the manufacture of mechanical springs for static duty and dynamic duty applications. 1.2 In addition to this European Standard, the general techn
22、ical delivery requirements of EN 10021 are applicable. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (includ
23、ing any amendments) applies. EN 10021, General technical delivery conditions for steel products EN 10052, Vocabulary of heat treatment terms for ferrous products EN 10204:2004, Metallic products Types of inspection documents EN 10218-1:2011, Steel wire and wire products General Part 1: Test methods
24、EN 10218-2, Steel wire and wire products General Part 2: Wire dimensions and tolerances EN 10244-2:2009, Steel wire and wire products Non-ferrous metallic coatings on steel wire Part 2: Zinc or zinc alloy coatings CEN/TR 10261, Iron and steel Review of available methods of chemical analysis EN ISO 3
25、77, Steel and steel products Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997) EN ISO 3887, Steels Determination of depth of decarburization (ISO 3887:2003) EN ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature (ISO 6892-
26、1:2009) EN ISO 14284, Steel and iron Sampling and preparation of samples for the determination of chemical composition (ISO 14284:1996) EN ISO 16120-1, Non-alloy steel rod for conversion to wire Part 1: General requirements (ISO 16120-1:2011) EN ISO 16120-2, Non-alloy steel wire rod for conversion t
27、o wire - Part 2: Specific requirements for general-purpose wire rod (ISO 16120-2:2011) EN ISO 16120-4, Non-alloy steel wire rod for conversion to wire - Part 4: Specific requirements for wire rod for special applications (ISO 16120-4:2011) BS EN 10270-1:2011EN 10270-1:2011 (E) 6 3 Terms and definiti
28、ons For the purposes of this document, the following terms and definitions apply. 3.1 patented cold drawn wire wire drawn to size by cold deformation of a starting material that has been subjected to a thermal treatment of patenting (see EN 10052), giving structure suitable for subsequent rolling or
29、 drawing 4 Classification The grade of spring wire used depends on the stress level and the nature of the duty. Where springs are subjected to static stresses or infrequent dynamic loading a wire grade for static duty (S) shall be used. In the other cases with frequent or predominantly dynamic loadi
30、ng and where small coiling ratios or severe bending radius is required, a wire grade for dynamic duty (D) shall be used. Depending on the stress level, spring wire is manufactured in 3 tensile strength grades: Low, medium and high. Table 1 gives an overview of the different grades. Table 1 Spring wi
31、re grades Tensile strength aStatic Dynamic Low tensile strength SL Medium tensile strength SM DM High tensile strength SH DH aFor specific applications another tensile strength may be agreed. 5 Information to be supplied by the purchaser The purchaser shall clearly state in his enquiry or order the
32、product and following information: a) the desired quantity; b) the term spring steel wire or straightened and cut lengths; c) the number of this European standard: EN 10270-1; d) the steel grade (see Tables 1 and 2); e) the nominal wire diameter selected from Table 3 and for cut length the length an
33、d the length tolerance class (see Table 7); f) the coating indicated by its abbreviation and surface finish (see 6.3); g) the form of delivery and unit mass (see 6.2); h) the type of inspection document; i) any particular agreement. EXAMPLE 5 t patented cold drawn tempered spring steel wire accordin
34、g to this standard, grade SM, nominal diameter 2,50 mm, phosphate coated on spools of about 300 kg; inspection document 3.1 according to EN 10204:2004: BS EN 10270-1:2011EN 10270-1:2011 (E) 7 5 t spring steel wire EN 10270-1 SM-2,50 ph on spools of about 300 kg; EN 10204:2004 3.1. 6 Requirements 6.1
35、 Material 6.1.1 General Steel spring wire shall be made from steel corresponding to EN ISO 16120-1 with in addition: for SL, SM and SH EN ISO 16120-2 for DM and DH EN ISO 16120-4 6.1.2 Chemical composition The chemical composition according to the heat analysis shall comply with the limit values sho
36、wn in Table 2. The permissible deviation of the product analysis from the heat analysis shall be in accordance with EN ISO 16120-2 and EN ISO 16120-4 respectively. Table 2 Chemical composition, % by mass Grade C aSi Mnb, cP S Cu max. max. max. SL, SM, SH 0,35 to 1,00 0,10 to 0,30 0,40 to 1,20 0,035
37、0,035 0,20 DM, DH 0,45 to 1,00 0,10 to 0,30 0,40 to 1,20 0,020 0,025 0,12 aSuch a wide range is stipulated to accommodate the whole range of sizes. For individual sizes the carbon range is substantially more restricted. bThe range of manganese content in the table is wide to cope with various proces
38、sing situations and the broad size range. The actual figures per size shall be more restricted. cFor the manganese content, a different range from the one indicated in the table may be agreed at the time of ordering, with a maximum not exceeding 1,20 % and with a minimum range of 0,20 %. The additio
39、n of micro-alloying elements may be agreed between the manufacturer and the purchaser. NOTE Some diameter ranges require particular attention for residuals. Therefore no figures are mentioned for chromium, nickel, molybdenum, tin, etc., leaving room for special arrangements between Purchaser and Sup
40、plier, dependent on their mutual processing conditions. This is also the case for the aluminium content. 6.2 Form of delivery The wire shall be delivered in unit packages of a coil (singles, carriers or formers), spools, spoolless cores or as straight lengths. Unless otherwise agreed at the time of
41、ordering, the form of delivery will be coils; straight lengths shall be supplied in bundles. 6.3 Coating and surface finish The spring wire may be supplied phosphate coated (ph) either dry drawn or wet drawn, copper coated (cu), zinc (Z) or zinc/aluminium (ZA) coated. Other coatings, considered as s
42、pecial, can be agreed between the purchaser and the supplier (see Annex A). BS EN 10270-1:2011EN 10270-1:2011 (E) 8 If no specific surface finish is specified, the type of finish shall be at the manufacturers discretion. In addition the wire can be ordered with an oiled surface for all surface finis
43、hes. 6.4 Mechanical properties For the tensile strength (Rm) and reduction in area after fracture (Z) the wire grades shall satisfy the values listed in Table 3. Reduction of area shall be measured only for wire diameter 0,80 mm and above. The range of tensile strength values within a unit package s
44、hall not exceed the values of Table 4. BS EN 10270-1:2011EN 10270-1:2011 (E) 9 Table 3 Mechanical properties aand quality requirements for wire grades SL, SM, DM, SH and DH 1 2 3 4 5 6 7 8 9 10 11 12 Wire diameter d Tensile strength Rmb c dMinimum reduction in area after fracture Z for wire grades S
45、L, SM, SH, DM and DH Minimum number of twists in the torsion test Ntfor wire grades SL, SM, SH, DM and DHcPermissible depth of surface defects for wire grades DM, DH Permissible decarburi- zation depth for wire grades DM, DH Mass hkg/ 1 000 m For wire gradesNominal size Permissible deviations SL SM
46、DM SH DH emm mm MPa MPa MPa MPa MPa % mm mm d = 0,05 2 800 to 3 520 0,015 4 0,05 d 0,06 2 800 to 3 520 0,022 2 0,06 d 0,07 0,003 2 800 to 3 520 0,030 2 0,07 d 0,08 2 800 to 3 480 0,039 5 0,08 d 0,09 2 800 to 3 430 0,049 9 0,09 d 0,10 2 800 to 3 380 0,061 7 0,10 d 0,11 2 800 to 3 350 0,074 6 0,11 d 0
47、,12 0,004 2 800 to 3 320 0,088 8 0,12 d 0,14 2 800 to 3 250 0,121 0,14 d 0,16 2 800 to 3 200 coiling test as - f- f0,158 0,16 d 0,18 2 800 to 3 160 specified in 0,200 0,18 d 0,20 0,005 2 800 to 3 110 7.4.3 0,247 0,20 d 0,22 2 770 to 3 080 0,298 0,22 d 0,25 2 720 to 3 010 0,385 0,25 d 0,28 2 680 to 2
48、 970 0,488 0,28 d 0,30 2 370 to 2 650 2 370 to 2 650 2 660 to 2 940 2 660 to 2 940 0,555 0,30 d 0,32 0,008 2 350 to 2 630 2 350 to 2 630 2 640 to 2 920 2 640 to 2 920 0,631 0,32 d 0,34 2 330 to 2 600 2 330 to 2 600 2 610 to 2 890 2 610 to 2 890 0,713 0,34 d 0,36 2 310 to 2 580 2 310 to 2 580 2 590 to 2 870 2 590 to 2 870 0,799 0,36 d 0,38 2 290 to 2 560 2 290 to 2 560 2 570 to 2 850 2 570 to 2 850 0,890 to be continued BS EN 10270-1:2011EN 10270-1:2011 (E) 10 Table 3 (continued) 1 2 3
