1、BRITISH STANDARD Nitriding steel - Technical delivery conditions The European Standard EN 10085:2001 has the status of a British Standard ICs 77.140.10 BS EN 10085:2001 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN 10085-ENGL 2001 lb24bb7 0710702 22T BS EN 1008
2、5:2001 Amd. No. This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 May 2001 Date Comments Q BSI 05-2001 National foreword This British Standard is the official E
3、nglish language version of EN 10085:2001. It supersedes table 6 of BS 970-1:1996. BS 970-1:1996 is currently under revision. The UK participation in its preparation was entrusted to Technical Committee ISE/31, Wrought steels, which has the responsibility to: - - aid enquirers to understand the text;
4、 present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this committee can be obtai
5、ned on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” fa
6、cility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obli
7、gations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 27 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication ISBN O 680 34305 7 STD-BSI BS
8、EN LOfl5-ENGL 2OOL = Lb2LibbS 0930703 Lbb EUROPEAN STANDARD EN 10085 NORME EUROPENNE EUROPISCHE NORM March 2001 ICs 77.140.10 English version Nitriding steels - Technical delivery conditions Aciers pour nitruration - Conditions techniques de livraison Nitriersthle - Technische Lieferbedingungen This
9、 European Standard was approved by CEN on 19 January 2001, CEN members are bound to comply with the CENICENELEC 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 referen
10、ces concerning such national standards may be obtained on application to the 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 i
11、ts own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Noway, Portugal, Spain,
12、Sweden, Switzerland and United Kingdom. EUROPEAN COMMTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FOR NORMUNG COMITE EUROPEEN DE NORMALISATION Management Centre: rue de Stassart, 36 6-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national
13、Members. Ref. No. EN 10085:2001 E Page 2 EN 10085:2001 Contents Fore word 3 4 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 7.6 8 8.1 8.2 9 Scope 4 Normative references 5 Terms and definitions 6 6 6 Classification and designation Classification Designation 6 6 7 Information to be sup
14、plied by the purchaser Mandatory information Options Manufacturing process General Heat-treatment and surface condition at delivery Cast separation Requirements Chemical composition, hardness and mechanical properties Shearability Structure Internal soundness Surface quality and decarburization Dime
15、nsions, tolerances on dimensions and shape 9 9 10 Inspection and testing Types and contents of inspection documents Specific inspection and testing 11 Marking 22 Annex A (normative): Ruling sections for the mechanical properties 24 Annex B (normative): Supplementary or special requirements 25 Annex
16、C (informative): Heat treatment Annex D (informative): Dimensional standards applicable to products complying with this European Standard 26 27 Bibliography STD-BSI BS EN 10085-ENGL 2001 I 1b24bb7 0710705 T39 = Page 3 EN 10085:2001 Foreword This European Standard has been prepared by Technical Commi
17、ttee ECISSflC 23 “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
18、 by September 2001, and conflicting national standards shall be withdrawn at the latest by September 2001. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic
19、, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. STD-BSI BS EN L0085-ENGL 2001 Lb24bb7 07L070b 775 = Page 4 EN 10085:2001 1 Scope 1.1 This European Standard specifies the technical deli
20、very requirements for - semi-finished products, e. g. blooms, billets, slabs (see NOTE 3); -bars(see NOTE 3); - rod; - wide flats; - hot- or cold-rolled strip and sheedplate; - forgings (see NOTE 3) manufactured from the nitriding steels listed in TzJe 3 and supplied in one of the heat-treatment con
21、ditions given for the different types of products in Table 1, line 2 to 4 and in one of the surface conditions given in Table 2. The steels are, in general, intended for the fabrication of quenched and tempered and generally machined and subsequently nitrided parts. NOTE 1 Some grades from EN 10083-
22、1 are also used for nitriding treatment. NOTE 2 Related European Standards are given in Bibliography. NOTE 3 Hammer-forged semi-finished products (blooms, billets, slabs etc.) and hammer-forged bars are in the following covered under semi-finished products or bars and not under the term “forgings”.
23、1.2 In special cases, variations in these technical delivery requirements or additions to them may form the subject of an agreement at the time of enquiry and order (see annex B). 1.3 In addition to the specifications of this European Standard, the general technical delivery requirements of EN 10021
24、 are applicable. 2 Normative references This European Standard incorporates by dated or undated reference, 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 amendm
25、ents to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments) . EN 10002-1, Metallic materials - Tensile testing - Part I
26、: Test method (at ambient temperature) “including Addendum AC1:1990” EN 10020, Definition and classijcation of grades of steel Page 5 EN 10085:2001 EN 10021, General technical delivery requirements for steel and iron products EN 10027-1, Designation systems for steel - Part 1: Steel names, principal
27、 symbols EN 10027-2, Designation systems for steel - Part 2: Numerical system EN 10045- 1, Metallic materials - Charpy impact test - Part 1: Test method EN 10052, Vocabulary of heat treatment terms for ferrous products EN 10079, Definition of steel products EN 101 63-2, Delivery requirements for sug
28、ace condition of hot-rolled steel plates, wide flats and sections - Part 2: Plates and wideflats EN 10204, Metallic products - Types of inspection documents (includes amendment A1:1995) EN 10221, Sugace quality classes for hot-rolled bars and rods - Technical delivery conditions CR 10260, Designatio
29、n systems for steels - Additional symbols CR 10261, ECZSS IC 11 - Iron and steel - Review of available methods of chemical analysis EN IS0 377, Steel and steel products - Location and preparation of samples and test pieces for mechanical testing EN IS0 6506-1, Metallic materials - Brinell hardness t
30、est - Part 1: Test method (IS0 6506-1:1999) EURONORM 103”, Microscopic determination of the ferritic or austenitic grain size of steels EURONORM 104l), Determination of the depth of decarburization of non-alloy and low alloy structural steels IS0 14284, Steel and iron - Sampling and preparation of s
31、amples for the determination of chemical composition 3 Terms and definitions For the purpose of this European Standard, the following terms and definitions apply in addition to the terms and definitions given in EN 10020, EN 10052, EN 10079, EN IS0 377 and IS0 14284. It may be agreed at the time of
32、ordering, until these EURONORMS have been adopted as European Standards, that these EURONORMS or the corresponding national standards should be applied. STD-BSI BS EN LOU5-ENGL 2001 1b24bb9 0910708 748 Page 6 EN 10085:2001 3.1 ding section that section for which the specified mechanical properties a
33、pply Independent of the actual shape and dimensions of the cross-section of the product the size of its ruling section is always given by a diameter. This corresponds to the diameter of an “equivalent round bar”. That is, a round bar which, at the position of its cross-section specified for taking t
34、he test pieces for the mechanical tests, will, when being cooled from austenitizing temperature, show the same cooling rate as the actual ruling section of the product concerned at its position for taking the test pieces. 3.2 nitriding steels heat-treatable steels containing controlled amounts of tw
35、o or more of the nitride forming elements aluminium, chromium, molybdenum, vanadium, making them particularly suitable for nitriding 4 Classification and designation 4.1 Classification All steels covered by this European Standard are classified as alloy special steels according to EN 10020. 4.2 Desi
36、gnation 4.2.1 Steel names For the steel grades covered by this European Standard, the steel names as given in the relevant tables are allocated in accordance with EN 10027-1 and CR 10260. 4.2.2 Steel numbers For the steel grades covered by this European Standard, the steel numbers as given in the re
37、levant tables 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 at the time of enquiry and order: a) the quantity to be delivered; b) the designation of the product form (e
38、. 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; STD-BSI BS EN LOO85-ENGL 2OL m LbZLibb9 0710709 b8Y m Page 7 EN 10085:2001 the number of this European Standard
39、 (EN 10085); steel name or steel number (see 4.2); if appropriate, the symbol for the heat treatment condition at delivery (see 6.2.1,6.2.2 and Table 1); if appropriate, the symbol for the surface condition at delivery (see 6.2.3 and Table 2); if required, the type of inspection document in accordan
40、ce with EN 10204 (see 8.1). EXAMPLE 20 rounds EURONORM 60 - 20x8000 EN 10085 - 34CrAiNi7-10+A EN 10204 - 3.1.B or 20 rounds EURONORM 60 - 20x8000 EN 10085 - 1.8550+A EN 10204 - 3.1.B 5.2 Options A number of options are specified in this European Standard and listed below. If the purchaser does not i
41、ndicate 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 special requirement on grain size (see 7.3.1 and 8.2.2); b) any requirement concerning the admissible ferrite content in the core (see
42、7.3.2); c) any requirement for internal soundness (see 7.4 and B.3); d) any requirement relating to surface quality (see 7.5.3); e) any requirement regarding the permissible depth of decarburization (see 7.5.4); f) any requirement relating to removal of surface defects (see 7.5.5); g) any verificati
43、on of the mechanical properties of reference test pieces in the quenched and tempered condition (see 8.2.1.1 and B.1); h) any requirement concerning special marking of the product (see clause 9 and B.5); i) any verification of the product analysis (see Table 8 and B.4); j) any requirement concerning
44、 non-metallic inclusion content (see B.2). STDOBSI BS EN LOOBci-ENGt 20131 D lb24bb7 0710710 3Tb D Page 8 EN 10085:2001 6 Manufacturing process 6.1 General The manufacturing process of the steel and of the products is left to the discretion of the manufacturer with the restrictions given by the requ
45、irements in 6.2 and 6.3. 6.2 Heat-treatment and surface condition at delivery 6.2.1 Normal condition at delivery Unless otherwise agreed at the time of enquiry and order, the products shall be delivered in the untreated, i. e. as rolled condition (see Table 2, NOTE a). 6.2.2 Particular heat-treatmen
46、t condition If so agreed at the time of enquiry and order, the products shall be delivered in one of the heat- treatment conditions given in Table 1, lines 2 to 4. 6.2.3 Particular surface condition If so agreed at the time of enquiry and order, the products shall be delivered in one of the particul
47、ar surface conditions given in Table 2, lines 3 to 6. 6.3 Cast separation The steels shall be delivered separated by casts. 7 Requirements 7.1 Chemical composition, hardness and mechanical properties The requirements for chemical composition, hardness and mechanical properties cited in Table 1, colu
48、mn 9, apply as appropriate for the particular heat-treatment condition. The requirements for mechanical properties given in this European Standard are restricted to the sizes given in Table 6. 7.2 Shearability Under suitable shearing conditions (avoiding local stress peaks, preheating, application o
49、f blades with a profile adapted to that of the product etc.) all steels are shearable in the condition “soft annealed”. 7.3 Structure 7.3.1 Unless otherwise agreed, the steel when tested in accordance with one of the methods described in EURONORM 103 shall show an austenitic grain size of 5 or finer. 7.3.2 Requirements for the ferrite content in the core may be agreed at the time of enquiry and order. STD-BSI BS EN LOO5-ENGL 2003 Lb2LibLS 09L071L 232 Page 9 EN 10085:2001 7.4 Internal soundness The steel shall be free from internal defects likely to have
