1、July 2009DEUTSCHE NORM English price group 15No part of this standard 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).ICS 77.140.15!$XTd“1534965www
2、.din.deDDIN EN 10343Steels for quenching and tempering for construction purposes Technical delivery conditionsEnglish version of DIN EN 10343:2009-07Vergtungssthle fr das Bauwesen Technische LieferbedingungenEnglische Fassung DIN EN 10343:2009-07See start of validitywww.beuth.deDocument comprises 36
3、 pagesDIN EN 10343:2009-07 2 Start of validity This standard is due to take effect on 1 December 2009. It should be noted that, in Germany, CE conformity marking of construction products will be permitted once this standard has been listed in the Bundesanzeiger (German Federal Law Gazette) and from
4、the date given therein. National foreword This standard has been prepared by Technical Committee ECISS/TC 23 “Steels for heat treatment, alloy steels and free-cutting steels Qualities and dimensions” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normena
5、usschuss Eisen und Stahl (Iron and Steel Standards Committee), Technical Subcommittee 05/1 Unlegierte und legierte Maschinenbausthle. A DIN Standard has not previously existed on the subject. EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 10343March 2009ICS 77.140.10English VersionSteels for quen
6、ching and tempering for construction purposes -Technical delivery conditionsAciers pour trempe et revenu pour usage de construction -Conditions techniques de livraisonVergtungssthle fr das Bauwesen - TechnischeLieferbedingungenThis European Standard was approved by CEN on 14 February 2009.CEN member
7、s 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 t
8、o the CEN 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 CEN Management Centre has the sam
9、e status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Roman
10、ia, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldw
11、ide for CEN national Members.Ref. No. EN 10343:2009: EEN 10343:2009 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .5 4 Classification and designation .6 5 Designation to be used on ordering 6 6 Manufacturing process .7 7 Requirements .8 8 Inspection 10 9 E
12、valuation of conformity 11 10 Preparation of samples and test pieces . 14 11 Testing on compliance criteria 15 12 Marking, labelling, packaging 16 Annex A (normative) Ruling sections for the mechanical properties . 26 A.1 Terms and Definitions 26 A.2 Determination of the diameter of the equivalent r
13、uling section 26 Annex B (normative) Dimensional standards applicable to products complying with this European Standard . 28 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 89/106/EEC, EU Construction Products Directive . 29 ZA.1 Scop
14、e and relevant characteristics 29 ZA.2 Procedures for the attestation of conformity of structural metallic construction products 30 ZA.3 CE marking and labelling . 32 DIN EN 10343:2009-07 EN 10343:2009 (E) 3 Foreword This document (EN 10343:2009) has been prepared by Technical Committee ECISS/TC 23
15、“Steels for heat treatment, 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 or by endorsement, at the latest by September 200
16、9, and conflicting national standards shall be withdrawn at the latest by December 2010. 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 right
17、s. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Construction Products Directive (89/106/EEC). For relationship with EU Construction Products Directive (CPD), see informative
18、Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, Franc
19、e, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 10343:2009-07 EN 10343:2009 (E) 4 1 Scope This document specifies the technical de
20、livery requirements for the following steel products intended for use in the construction industry: bars (including hammer-forged bars); wide flats; hot-rolled strip and sheet/plate; forgings. They are manufactured from the direct hardening non alloy steels for quenching and tempering and the direct
21、 hardening alloy steels for quenching and tempering and supplied in one of the heat treatment conditions given for the different types of products in Table 1. These steels are generally intended for the manufacture of quenched and tempered parts, but can also be used in the normalized condition. The
22、 requirements for mechanical properties are restricted to part sizes given in Tables 4 and 5. NOTE 1 In accordance with EN 10020, the steels covered by this standard are quality and special steels. The differences between quality and special steels are characterized by the following requirements, wh
23、ich are valid for special steels only: the minimum impact values in the quenched and tempered condition (for non alloy special steels in the case of mean percentages by mass of carbon 12 mm, standard 10 mm x 10 mm test pieces shall be machined in such a way that one side is not further away than 2 m
24、m from a rolled surface (see Figure 3). DIN EN 10343:2009-07 EN 10343:2009 (E) 15 10.3 Identification of samples and test pieces Samples and test pieces shall be marked so that the original products and their location and orientation in the product are known. 11 Testing on compliance criteria 11.1 C
25、hemical analysis The chemical analysis shall be carried out using the appropriate European Standard for the element being analysed. In the absence of an appropriate European Standard, the choice of a suitable physical or chemical analytical method for the analysis shall be at the discretion of the m
26、anufacturer. The manufacturer shall declare the test method used, if required. The list of available ENs on chemical analysis is given in CEN/TR 10261. 11.2 Mechanical tests 11.2.1 Tensile test The tensile test shall be carried out in accordance with EN 10002-1. For the specified yield strength in t
27、he Tables 4 and 5 on mechanical properties the upper yield strength (ReH) shall be determined. If a yield phenomenon is not present, the 0,2 % proof strength (Rp0,2) shall be determined. 11.2.2 Impact test The impact test shall be carried out in accordance with EN 10045-1. The average value of a set
28、 of three test pieces shall be equal to or greater than the specified value. One individual value may be below the specified value, provided that it is not less than 70 % of that value. If the above conditions are not satisfied then an additional set of three test pieces may be taken at the discreti
29、on of the manufacturer from the same sample and tested. To consider the test unit as conforming, after testing the second set, the following conditions shall be satisfied simultaneously: a) the average value of six test pieces shall be equal to or greater than the specified value; b) not more than t
30、wo of six individual values may be lower than the specified value; c) not more than one of the six individual values may be lower than 70 % of the specified value. If these conditions are not satisfied the sample product is rejected and retests may be carried out on the remainder of the test unit (s
31、ee 11.3). 11.3 Retests For retests, EN 10021 shall apply. DIN EN 10343:2009-07 EN 10343:2009 (E) 16 12 Marking, labelling, packaging The manufacturer shall mark the products or the bundles or boxes in a suitable way so that it is possible to determine the cast, the steel grade and the origin of the
32、delivery (for special agreements see B.7 of EN 10083-1:2006). Dimensions in mm Key 1 Tensile test piece 2 Notched bar impact test piece 3 Round and similar shaped sections 4 Rectangular and square sections a For small products (d or t 25 mm), the test piece shall, if possible, consist of an unmachin
33、ed part of the bar. b For round bars the longitudinal axis of the notch shall be about parallel to the direction of a diameter. c For rectangular bars, the longitudinal axis of the notch shall be perpendicular to the wider rolling surface. Figure 1 Location of the test pieces in bars DIN EN 10343:20
34、09-07 EN 10343:2009 (E) 17 Dimensions in mm Key 1 Principal direction of rolling a For steel grades with requirements for the impact energy, the width of the sample shall be sufficient for longitudinal impact test pieces to be taken as specified in Figure 3. Figure 2 Location of the samples (A and B
35、) in flat products in relation to the product width Type of test Product thickness Location of the test pieceafor a product width of Distance of the test piece from the rolled surface mm w 30 Impact testc 12dlongitudinal longitudinal aLocation of the longitudinal axis of the test piece with respect
36、to the principal rolling direction. bThe test piece shall comply with EN 10002-1. cThe longitudinal axis of the notch shall be perpendicular to the rolled surface. dIf agreed at the time of ordering, the test piece from products with a thickness exceeding 40 mm may be takenfrom 1/4 product thickness
37、. Key 1 Rolled surface 2 Alternatives Figure 3 Location of the test piece from flat products in relation to product thickness and principal direction of rolling DIN EN 10343:2009-07 EN 10343:2009 (E) 18 Table 1 Combinations of usual heat-treatment conditions at delivery, product forms and requiremen
38、ts as specified in tables 2 to 5 1 2 3 4 5 6 1 Heat treatment condition at delivery Symbol x indicates applicable for Applicable requirements if the steel is ordered with the designation given in Bars Flat products Hammer and drop forgings Table 2 6.1 6.2 2 Normalizedb+N x xax Chemical composition a
39、ccording to Tables 2 and 3 Mechanical properties according toTable 5 3 Quenched and tempered+QTx xa x Table 4aIt is not possible to deliver all dimensions of flat products in this heat-treatment condition. bNormalizing may be replaced by normalizing forming. DIN EN 10343:2009-07 EN 10343:2009 (E) 19
40、 Table 2 Steel grades and chemical composition (cast analysis) Steel designation Chemical composition % by mass aName Number C Si max. Mn P max. S Cr Mo Ni Cr+Mo+Nimax. V B Non alloy quality steels bC35 1.0501 0,32 to 0,39 0,40 0,50 to 0,80 0,045 max. 0,045 max. 0,40 max. 0,10 max. 0,40 0,63 - - C45
41、 1.0503 0,42 to 0,50 0,40 0,50 to 0,80 0,045 max. 0,045 max. 0,40 max. 0,10 max. 0,40 0,63 - - Non alloy special steelsbC35E 1.1181 0,32 to 0,39 0,40 0,50 to 0,80 0,030 max. 0,035c max. 0,40 max. 0,10 max. 0,40 0,63 - - C35R 1.1180 0,020 to 0,040 C45E 1.1191 0,42 to 0,50 0,40 0,50 to 0,80 0,030 max.
42、 0,035c max. 0,40 max. 0,10 max. 0,40 0,63 - - C45R 1.1201 0,020 to 0,040 Alloy special steels without boron b25CrMo4 1.7218 0,22 to 0,29 0,40 0,60 to 0,90 0,025 max. 0,035 0,90 to 1,20 0,15 to 0,30 - - - - 42CrMo4 1.7225 0,38 to 0,45 0,40 0,60 to 0,90 0,025 max. 0,035 0,90 to 1,20 0,15 to 0,30 - -
43、- - 50CrMo4 1.7228 0,46 to 0,54 0,40 0,50 to 0,80 0,025 max. 0,035 0,90 to 1,20 0,15 to 0,30 - - - - 34CrNiMo6 1.6582 0,30 to 0,38 0,40 0,50 to 0,80 0,025 max. 0,035 1,30 to 1,70 0,15 to 0,30 1,30 to 1,70 - - - 51CrV4 1.8159 0,47 to 0,55 0,40 0,70 to 1,10 0,025 max. 0,025 0,90 to 1,20 - - - 0,10 to
44、0,25 - Alloy special steels with boron 20MnB5 1.5530 0,17 to 0,23 0,40 1,10 to 1,40 0,025 max. 0,035 - - - - - 0,0008 to 0,0050 27MnCrB5-2 1.7182 0,24 to 0,30 0,40 1,10 to 1,40 0,025 max. 0,035 0,30 to 0,60 - - - - 0,0008 to 0,0050 Precautions shall be taken to prevent the addition of such elements
45、from scrap or other material used in the manufacture which affect the mechanical properties and applicability. aWhere requirements are made on the mechanical properties in the quenched and tempered condition (see Table 4), deviations from the limits for the cast analysis are permissible, except for
46、the elements carbon, phosphorus and sulphur. The deviations shall not exceed the specifications of Table 3. bSteels with improved machinability as a result of the addition of higher sulphur contents up to around 0,10% S (including resulphurized steels with controlled inclusion content (e.g. Ca treat
47、ment) may be supplied on request. For these steels, increasing the Mn content up to +0,15 % is permitted. cIf agreed at the time of enquiry and order, for flat products sulphur can be restricted to max. 0,010 % by mass. DIN EN 10343:2009-07 EN 10343:2009 (E) 20 Table 3 Permissible deviations between
48、 the product analysis and the limiting values given in Table 2 for the cast analysis Element Permissible maximum content in the cast analysis % by mass Permissible deviationa% by mass C 0,55 0,02 Si 0,40 + 0,03Mn 1,00 0,04 1,00 1,40 0,05 P 0,045 + 0,005 S 0,045 + 0,005b Cr 1,7 0,05 Mo 0,30 0,03 Ni 1
49、,7 0,05 V 0,25 0,02 B 0,0050 0,0003 a means that in one cast, the deviation may occur over the upper valueor under the lower value of the specified range in Table 2, but not bothat the same time. bFor steels with a specified sulphur range of 0,020% to 0,040% according to cast analysis, the permissible deviation is 0,005%. DIN EN 10343:2009-07 EN 10343:2009 (E) 21 Table 4 Mechanical properties aat room temperature in the quenched and tempered condition (+QT) Steel designation Mechanical properties for the ruling
