1、DEUTSCHE NORM Februarv 1998 Ferritic-pearlitic steels for precipitation hard en i ng from hot - wor ki ng tem perat u res English version of DIN EN 10267 DIN - EN 10267 ICs 77.140.10; 77.140.20 Descriptors: Steel, ferritic steel, precipitation hardening. Von Warmformgebungstemperatur ausscheidungshr
2、tende ferritisch-perlitische Sthle European Standard EN 10267 : 1998 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been prepared by ECISS/TC 23. The responsible German body involved in the preparation of this standard was the Normenaussc
3、hu Eisen und Stahl (Steel and Iron Standards Committee). EN comprises 18 pages. No pari of this standard may be reproduced without the prior permission of Ref. No. DIN EN 10267 : 1998-0 V Deutsches Institut fr Nonung e. V., Berlin. Luth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale fo
4、r German Standards (DIN-Normen). English price group O9 . Sales No. 1109 05.98 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10267 January 1998 ICs 77.140; 77.140.10 Descriptors: Steel, ferritic steel, precipitation hardening. English version Ferritic-pearlitic steels for precipitation harden
5、ing from hot - wor ki ng tem perat u res Aciers de type ferrite-perlite aptes au durcissement par prcipitation partir des tempratures de formage chaud Von Warmformgebungstemperatur ausscheidungshrtende ferritisch- perlitische Sthle This European Standard was approved by CEN on 1997-1 2-1 1. CEN memb
6、ers are bound to comply with the CENKENELEC 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 stand- ards may be obtained on applicat
7、ion to the Central Secretariat or to any CEN member. The European Standards exist 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 Central Secretariat has the s
8、ame status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN Europ
9、ean Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, 8-1050 Brussels O 1998. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN 10267 : 1998 E Page
10、2 EN 10267 : 1998 Content s Foreword 1 2 3 4 4.1 4.2 5 5.1 5.2 6 6.1 6.2 6.3 7. 7.1 7.2 7.3 7.4 7.5 8 8.1 8.2 9 Scope Normative references Definitions Classification and designation Classification Designation Information to be supplied by the purchaser Mandatory information Options Manufacturing pro
11、cess General Deoxidation Heat-treatment and surface condition at delivery Requirements Chemical composition and mechanical properties Structure Internal soundness Surface quality Dimensions, tolerances on dimensions and shape inspection and testing Types and contents of inspection documents Specific
12、 inspection and testing Marking Annex A (normative): Supplementary or special requirements Annex B (informative): Guide to additional property values Annex C (informative) : Dimensional standards applicable to products complying with this European Standard Page 3 4 4 5 5 5 5 5 5 6 6 6 6 6 7 7 7 7 7
13、8 8 8 8 9 16 17 18 Page 3 EN 10267 : 1998 Foreword This European Standard has been prepared by ECICS/TC 23 “Steels for heat treatment, alloy steels and free-cutting steels-qualities“, the Secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, ei
14、ther by publication of an identical text or by endorsement, at the latest by July 1998, and conflicting national standards shall be withdrawn at the latest by July 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to im
15、plement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Page 4 EN 10267 : 1998 1 Scope 1.1 This European Standard gives the tech
16、nical delivery re- quirements for semi-finished products and bars of the non alloy special steels listed in tables 3 and 5. The products are supplied in the conditions given in table 1, line 2 to 4, and in one of the surface conditions given in table 2. 1.2 In special cases, variations in these tech
17、nical delivery requirements or additions to them may form the subject of an agreement at the time of enquiry and order (see Annex A). 1.3 In addition to the specifications of this European Stan- dard, the general technical delivery requirements of EN 10021 are applicable, unless otherwise specified.
18、 2 Normative references This European Standard incorporates by dated or undated refe- rence, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or rev
19、isions of any of these publi- cations apply to this European Standard only when incorporated in it by amendment or revision. For undated references the la- test edition of the publication referred to applies. EN 10002-1 EN 10003-1 EN 10020 EN 10021 EN 10027-1 EN 10027-2 EN 10079 EN 10204 EN 10221 CR
20、 10260 CR 10261 Metallic materials - Tensile testing - Part 1: Method of test (at ambient temperature) Metallic materials - Brinell hardness test - Part 1: Test method Definition and classification of grades of steel General technical delivery requirements for steel and iron products Designation sys
21、tems for steel - Part 1: Steel names, principal symbols Designation systems for steel - Part 2: Numerical system Definition of steel products Metallic products - Types of inspection documents (includes amendment A1:1995) Surface quality classes for hot-rolled bars and rods - Technical delivery condi
22、tions ECISS IC 10 - Designation systems for steel - Additional symbols for steel names ECISS IC 11 - Iron and steel - Review of available methods of chemical analysis Page 5 EN 10267 : 1998 prEN IS0 377 Steel and steel products - Location and preparation of test pieces for mechanical testing IS0 142
23、84 Steel and iron - Sampling and preparation of samples for the determination of chemical composition 3 Definitions For the purpose of this European Standard, the definitions given in EN 10020, EN 10021, EN 10079, prEN IS0 377 and IS0 14284 apply. 4 Classification and designation 4.1 Classification
24、All steels covered by this European Standard are classified as non alloy special steels according to EN 10020. 4.2 Designation 4.2.1 Steel names For the steel grades covered by this European Standard, the steel names as given in tables 3 and 5 are allocated in accordance with EN 10027-1 and CR 10260
25、. 4.2.2 Steel numbers For the steel grades covered by this European Standard, the steel numbers as given in tables 3 and 5 are allocated in accordance with EN 10027-2. 5 Information to be supplied by the purchaser 5.1 Mandatory information The following information shall be supplied by the purchaser
26、 at the time of enquiry and order: a) the quantity to be delivered; b) the designation of the product form (e.g. round or square ; c) the number of the dimensional standard; d) the dimensions and tolerances on dimensions and shape and, if applicable, letters denoting relevant special tolerances; e)
27、the number of this European Standard (EN 10267); f) steel name or steel number (see 4.2) ; g) if appropriate, the symbol for the treatment condition at delivery (see 6.3.1 and table 1); h) if appropriate, the symbol for the surface condition at delivery (see 6.3.2 and table 2) ; i) if required, the
28、type of inspection document in accordance with EN 10204 (see 8.1). Page 6 EN 10267 : 1998 EXAMPLE : 20 rounds EURONORM 60 - 40x8000 EN 10267 - 19MnVS6+P EN 10204 - 2.2 or 20 rounds EURONORM 60 - 40x8000 EN 10267 - 1.1301+P EN 10204 - 2.2 5.2 Options A number of options are specified in this European
29、 Standard and listed below. If the purchaser does not indicate his wish to implement one of these options, the supplier shall supply in accordance with the basis specification of this European Standard (see 5.1). a) any requirement concerning non-metallic inclusion content (see 7.2.2 and A.1); b) an
30、y requirement for internal soundness (see 7.3 and A.2); c) any requirement relating to surface quality (see 7.4.1); d) any requirement relating to removal of surface defects (see 7.4.2); e) any requirement concerning special marking of the products (see clause 9 and A.4); f) any verification of the
31、product analysis (see table 6 and A.3). 6 Manufacturing process 6.1 General The manufacturing process of the steel and of the products is left to the discretion to the manufacturer with the restrictions given by the requirements in 6.2 and 6.3. 6.2 Deoxidation All steels shall be killed. 6.3 Heat-tr
32、eatment and surface condition at delivery 6.3.1 Heat-treatment condition Products which are intended for hot forging, shall be delivered in the untreated condition or in the condition “treated for cold shearing“. Products which are intended for machining, shall be delivered in the precipitation hard
33、ened condition. 6.3.2 Surface condition Unless otherwise agreed (see table 2, lines 3 to 6) at the time of enquiry and order, the products shall be delivered in the as-hot- worked condition. Page 7 EN 10267 : 1998 6.3.3 Cast separation The steels shall be delivered separated by casts. Identified pro
34、ducts stemming from several casts may be delivered in the same means of transport, e.g. lorry or wagon. 7 Requirements 7.1 Chemical composition and mechanical properties 7.1.1 Where the products are to be delivered in the untreated condition, the requirements for chemical composition given in tables
35、 3 and 4 apply. In addition, for products to be delivered in the condition “treated for cold shearing“, a maximum Brinell hardness of 255 applies. NOTE: Guidance data for mechanical properties of hot forgings after precipitation hardening are given in table B.1. 7.1.2 Where the products are to be de
36、livered in the precipitation hardened condition, the requirements for mechanical properties given in table 5 apply. NOTE: In this case, the chemical composition given in table 3 is for guidance only. 7.2 Structure 7.2.1 Steels in table 5 are control-cooled from the hot-working temperature to produce
37、 a ferritic-pearlitic structure. Under certain circumstances, small portions of bainite and/or martensite may be present. 7.2.2 For the content of non-metallic inclusions, see A.l. 7.3 Internal soundness Requirements for internal soundness may be agreed upon at the time of enquiry and order, e.g. on
38、 the basis of non-destructive tests (see A.2). 7.4 Surface quality 7.4.1 At the time of enquiry and order, agreements may be made concerning the required surface quality. In the case of bars, such agreements should be made in accordance with EN 10221. 7.4.2 Repair of surface discontinuities by weldi
39、ng is not permitted. If surface discontinuities are removed, the kind of surface discontinuities and permissible depth for their removal should, where appropriate, be agreed upon at the time of enquiry and order. Page 8 EN 10267 : 1998 7.5 Dimen8iOn8, tolerances on dimension8 and shape The nominal d
40、imensions, tolerances on dimensions and shape tolerances for the product shall be agreed at the time of enquiry and order, if possible, with reference to the dimensional standards applicable (see annex Cl. 8 Inspection and testing 8.1 Types and contents of inspection documents 8.1.1 For each deliver
41、y, the issue of any inspection document according to EN 10204 may be agreed upon at the time of enquiry and order. 8.1.2 If, in accordance with the agreements made at the time of enquiry and order, a test report is to be provided, this shall cover: a) b) the statement that the material complies with
42、 the require- ments of the order; the results of the cast analysis for all elements specified for the type of steel supplied. (This also applies to the grades of table 5.) 8.1.3 If, in accordance with the agreements in the order, an inspection certificate 3.1.A, 3.1.B or 3.1.C or an inspection repor
43、t 3.2 (see EN 10204) is to be provided, the specific in- spections and tests described in 8.2 shall be carried out and their results shall be certified in the document. In addition the document shall cover a) the results of the cast analysis provided by the manufac- turer for all elements specified
44、in table 3 for the steel type concerned (this also applies to the grades of table 5) ; b) the results of all inspections and tests ordered by supple- mentary requirements (see annex A); c) the symbol letters or numbers connecting the inspection documents, the test pieces and products to each other.
45、8.2 Specific inspection and testing 8.2.1 Verification of the mechanical properties 8.2.1.1 Unless otherwise agreed, only the mechanical properties according to table 5 shall be verified for steels ordered and delivered in the precipitation hardened condition. Page 9 EN 10267 : 1998 8.2.1.2 The amou
46、nt of testing, the sampling conditions and the test methods used for the verification of the requirements shall be as given in table 6. 8.2.2 Testing of the surface quality For bars, the verification of the surface quality shall be in accordance with EN 10221 unless otherwise agreed. For billets, th
47、e details of verification are to be agreed upon at the time of enquiry and order. 8.2.3 Visual and dimensional inspection A sufficient number of products shall be inspected to ensure compliance with the specification. 8.2.4 Retests For retests, EN 10021 shall apply. 9 Marking The manufacturer shall
48、mark the products or the bundles or boxes containing the products in a suitable way, so that the identification of the cast, the steel type and the origin of the delivery is possible (see A.4). Page 1 O EN 10267 : 1998 I Table 1: Combinations of usual forms (and their application) tables 2 I 3 Condi
49、tion at delivery I Symbol Unless otherwise agreed Particular conditions supplied by agreement Untreated As hot worked HW + pickled HW +blast cleaned HW + surface removal “ Others None or +U I None or +HW +PI +BC Treated for cold shearing Y. x X x X X x +S 1 Precipitation hardened +P I x indicates applicable for semi-finished bars for machining products and bars conditions at delivery, product and requirements according to 3 to 5 I Applicable requiremenis Chemical composition according to tables 3 and 4 Chemical composition according to tables 3 and 4 and maximum Brinel
