1、January 2012 Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC
2、S 77.140.25!$y+“1860857www.din.deDDIN EN 10270-2Steel wire for mechanical springs Part 2: Oil hardened and tempered spring steel wireEnglish translation of DIN EN 10270-2:2012-01Stahldraht fr Federn Teil 2: lschlussvergteter FederstahldrahtEnglische bersetzung von DIN EN 10270-2:2012-01Fils en acier
3、 pour ressorts mcaniques Partie 2: Fils en acier tremps lhuile et revenusTraduction anglaise de DIN EN 10270-2:2012-01SupersedesDIN EN 10270-2:2001-12www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 20 pages12.11 DIN EN 10270-2:2012-01 2
4、 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ECISS/TC 106 “Wire rod and wires” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Eisen und Stahl (Iron and Steel Standards C
5、ommittee), Working Committee NA 021-00-08-04 UA Patentiert-gezogener oder vergteter Federstahldraht. Amendments This standard differs from DIN EN 10270-2:2001-12 as follows: a) normative references have been updated; b) Subclause 4.2 “Designation” has been deleted; c) new spring wire grades have bee
6、n included in Table 1: FDSiCrV, TDSiCrV and VDSiCrV; d) Clause 5 “Information to be supplied by the purchaser” has been revised; e) in Table 2 relating to the chemical composition, the manganese range for grades VDSiCr, TDSiCr and FDSiCr has been updated to read: “0,50-0,90” and the corresponding va
7、lues have been added for the new steel grades. A new footnote c has been added stating that for medium and high fatigue grades the range of vanadium content can be changed upon agreement ; f) Tables 3, 4, 5, 6 and 8 have been revised and supplemented with regard to the new wire grades; g) Table 7 ha
8、s been rearranged according to the nominal wire diameter; h) in Subclause 6.8.1 “Dimensional tolerances”, the definition of level T5 has been revised; i) in Subclause 7.4.2 “Tensile test”, the reference to EN 10218-1 has been deleted; j) Subclause 7.4.4 “Simple torsion test” has been revised; k) the
9、 standard has been editorially revised. Previous editions DIN 17223: 1955-04 DIN 17223-2: 1964-03, 1990-09 DIN EN 10270-2: 2001-12 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10270-2 October 2011 ICS 77.140.25 Supersedes EN 10270-2:2001English Version Steel wire for mechanical springs - Par
10、t 2: Oil hardened and tempered spring steel wire Fils en acier pour ressorts mcaniques - Partie 2: Fils en acier tremps lhuile et revenus Stahldraht fr Federn - Teil 2: lschlussvergteter Federstahldraht This European Standard was approved by CEN on 10 September 2011. CEN members are bound to comply
11、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 standards may be obtained on application to the CEN-CENELEC Ma
12、nagement 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 notified to the CEN-CENELEC Management Centre has the same
13、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, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Port
14、ugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10270-2:2011: EEUROPEAN COMMITTEE FOR STAND
15、ARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG EN 10270-2:2011 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Classification 55 Information to be supplied by the purchaser .56 Requirements .66.1 Form of delivery .66.2 Surface fini
16、sh .66.3 Chemical composition 66.4 Non metallic inclusions .66.5 Mechanical properties .66.6 Technological properties . 126.7 Surface quality 126.8 Dimensions and dimensional tolerances . 137 Testing and inspection . 147.1 Inspection and inspection documents . 147.2 Extent of testing for specific in
17、spection 147.3 Sampling 147.4 Test methods . 157.5 Retests . 168 Marking and packaging 16Annex A (informative) Additional information . 18A.1 Modulus of elasticity and shear modulus at room temperature 18DIN EN 10270-2:2012-01 EN 10270-2:2011 (E) 3 Foreword This document (EN 10270-2:2011) has been p
18、repared by Technical Committee ECISS/TC 106 “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 st
19、andards shall be withdrawn at the latest 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 10
20、270-2:2001. This European Standard for steel 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 Regula
21、tions, the national standards organizations 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, Malt
22、a, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 10270-2:2012-01 4 1 Scope 1.1 This European Standard applies to oil hardened and tempered spring steel wire made from unalloyed or alloyed steels. They are primarily subje
23、ct to torsional stresses such as in coil springs for compression and extension and in special cases also for applications where the spring wire is subject to bending stresses such as lever springs. As a rule unalloyed steels are used for applications at room temperature whereas alloyed steels are ge
24、nerally used at a temperature above room temperature. Alloyed steels may also be chosen for above average tensile strengths. 1.2 In addition to this European Standard, the general technical delivery requirements of EN 10021 are applicable. 2 Normative references The following referenced documents ar
25、e 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 (including any amendments) applies. EN 10021, General technical delivery conditions for steel products EN 10204:2004, Meta
26、llic products Types of inspection documents EN 10218-1:2011, Steel wire and wire products General Part 1: Test methods EN 10218-2, Steel wire and wire products General Part 2: Wire dimensions and tolerances EN 10247, Micrographic examination of the non-metallic inclusion content of steels using stan
27、dard pictures 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 mechanical testing (ISO 377:1997) EN ISO 3887, Steels Determination of depth of decarburization (ISO 3887:2003) EN
28、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) ISO 7800, Metallic materials Wire Simple torsion test 3 Terms an
29、d definitions For the purposes of this document, the following terms and definitions apply. 3.1 oil hardened and tempered spring steel wire wire that is heat treated in line in the following way: it is first transformed into austenite, quenched in oil or similar quenching medium, followed immediatel
30、y by tempering by heating to the appropriate temperature EN 10270-2:2011 (E) DIN EN 10270-2:2012-01 5 4 Classification This standard deals with all types of hardened and tempered spring steel wire. The grade for normal applications made from unalloyed or alloyed steel has the abbreviation FD and is
31、intended for static applications. Spring steel wire for medium fatigue levels, such as required for some clutch springs from unalloyed or alloyed steel, has the abbreviation TD. Spring steel wire from unalloyed steel or alloyed steel intended for use under severe dynamic duty such as for valve sprin
32、gs or other springs with similar requirements has the abbreviation VD. The diameter ranges for the various wire grades are shown in Table 1. Table 1 Spring wire grades and diameter range Tensile strength Static Medium fatigue High fatique Low tensile strength FDC TDC VDC Medium tensile strength FDCr
33、V TDCrV VDCrV High tensile strength FDSiCr TDSiCr VDSiCr Very high tensile strength FDSiCrV TDSiCrV VDSiCrV Diameter range (mm) 0,50 to 17,00 0,50 to 10,00 0,50 to 10,00 Medium and high fatigue grades TD and VD are characterized by high steel cleanliness, specific chemical, mechanical and technologi
34、cal parameters and a well defined surface condition in relation to the allowable depth of surface defects and decarburization. The static grade FD is characterized by its chemical, mechanical and technological characteristics as well as by a specified surface condition concerning surface defects and
35、 decarburization. 5 Information to be supplied by the purchaser The purchaser shall clearly state in his enquiry or order the 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 10270-2
36、; d) the steel grade (see Tables 1 and 2); e) the nominal wire diameter selected from Tables 4 or 5 and for cut length the length and the length tolerance class (see Table 9); f) the form of delivery and unit mass (see 6.1); g) the type of inspection document; h) any particular agreement. EXAMPLE 5
37、t oil hardened and tempered spring steel wire according to this standard, grade VDC, nominal diameter 2,50 mm in coils of about 300 kg; inspection document 3.1 according to EN 10204:2004: EN 10270-2:2011 (E) DIN EN 10270-2:2012-01 6 5 t spring steel wire EN 10270-2 VDC-2,50 in coils of about 300 kg;
38、 EN 10204:2004 3.1 6 Requirements 6.1 Form of delivery 6.1.1 Oil hardened and tempered wire shall be supplied in coils, on spools or in cut lengths. The wire in coils or on spools shall form one continuous length. Wire in coil may also be supplied on carriers containing one or more coils. For “VD“ a
39、nd “TD“ grades no welds are permitted after the heat treatments preceding the final drawing operation; for “FD“ grades no welds shall be made at finished size unless agreed otherwise between the parties. 6.1.2 The supplied wire units shall be tightly bound to ensure that wire spiral waps do not spri
40、ng out unexpectedly. The starting end shall be marked and at the coil ends the wire shall be covered with a protective cap. 6.2 Surface finish The wire shall be protected against corrosion and mechanical damage. Unless otherwise specified the wire shall be delivered in slightly oiled condition. 6.3
41、Chemical composition The steel is characterized by the heat analysis which shall be in accordance with the values of Table 2. The permissible deviation of the product analysis from the limiting values of heat analysis shall be in accordance with Table 3. 6.4 Non metallic inclusions The “VD“ grades s
42、hall be checked for maximum size of inclusion according to EN 10247. The allowable level of inclusions shall be agreed between the parties at the enquiry and order. 6.5 Mechanical properties For tensile strength Rmand reduction in area after fracture (Z) the wire grades shall satisfy the values list
43、ed in Tables 4 and 5. Reduction of area is measured only for size 1,00 mm and above (see Tables 4, 5 and 11). The range of the tensile strength values within a coil/reel shall not exceed 50 MPa for the grades “VD“, 60 MPa for the grades “TD“ and 70 MPa for the grades “FD“. EN 10270-2:2011 (E) DIN EN
44、 10270-2:2012-01 7 Table 2 Chemical composition, % by mass Grade C Si Mn aP S Cu Cr Vmax. max. max.VDC 0,60 to 0,75 0,15 to 0,30 0,50 to 1,00 0,020 0,020 0,06 -b - VDCrV 0,62 to 0,72 0,15 to 0,30 0,50 to 0,90 0,025 0,020 0,06 0,40 to 0,60 0,15 to 0,25 VDSiCr 0,50 to 0,60 1,20 to 1,60 0,50 to 0,90 0,
45、025 0,020 0,06 0,50 to 0,80 - VDSiCrV 0,50 to 0,70 1,20 to 1,65 0,40 to 0,90 0,020 0,020 0,06 0,50 to 1,00 0,10 to 0,25CTDC 0,60 to 0,75 0,10 to 0,35 0,50 to 1,20 0,020 0,020 0,10 -b - TDCrV 0,62 to 0,72 0,15 to 0,30 0,50 to 0,90 0,025 0,020 0,10 0,40 to 0,60 0,15 to 0,25 TDSiCr 0,50 to 0,60 1,20 to
46、 1,60 0,50 to 0,90 0,025 0,020 0,10 0,50 to 0,80 - TDSiCrV 0,50 to 0,70 1,20 to 1,65 0,40 to 0,90 0,020 0,020 0,10 0,50 to 1,00 0,10 to 0,25CFDC 0,60 to 0,75 0,10 to 0,35 0,50 to 1,20 0,030 0,025 0,12 -b - FDCrV 0,62 to 0,72 0,15 to 0,30 0,50 to 0,90 0,030 0,025 0,12 0,40 to 0,60 0,15 to 0,25 FDSiCr
47、 0,50 to 0,60 1,20 to 1,60 0,50 to 0,90 0,030 0,025 0,12 0,50 to 0,80 - FDSiCrV 0,50 to 0,70 1,20 to 1,65 0,40 to 0,90 0,030 0,025 0,12 0,50 to 1,00 0,10 to 0,25 aManganese may be ordered with restricted range, but with a minimum range of 0,20 %.bFor heavy wire diameter (above 8,5 mm) chromium may b
48、e added up to 0,30 % for proper through hardening. CFor medium and high fatigue grades the range of vanadium content can be limited to 0,05 % to 0,15 %Table 3 Permissible deviation of the product analysis from the limiting values for the heat analysis Chemical element Wire grade Permissible deviation % by mass C All 0,03 Si SiCr, SiCrV 0,05 other grades 0,03 Mn All 0,04 P All + 0,005S All 0,005Cu All + 0,02 Cr All 0,05 V All 0,02 EN 10270-
