1、DEUTSCHE NORM July 2001 I I Nitriding steels Technical delivery conditions English version of DIN EN 10085 I DIN - EN 10085 ICs 77.140.10; 77.140.20 Nitriersthle - Technische Lieferbedingungen Supersedes DIN 1721 1, April 1987 edition. European Standard EN 10085: 2001 has the status of a DIN Standar
2、d. A comma is used as the decimal marker. National foreword This standard has been prepared by ECISS/TC 23 Steels for heat treatment, alloy steels and free-cutting steels - Qualities (Secretariat: Germany).The responsible German body involved in its preparation was the Normenausschuss Eisen und Stah
3、l (Steel and Iron Standards Committee). The DIN Standards corresponding to the documents referred to in clause 2 of the EN are as follows: Euronorm 103 DIN 50601 Euronorm 104 DIN 50192 CR 10260 DIN V 17006-1 O0 Amendments DIN 1721 1, April 1987 edition, has been superseded by the specifications of E
4、N 10085. Previous editions DIN 17221: 1970-08, 1987-04. National Annex NA Standards referred to (and not included in Normative references) DIN 50192 Determination of depth of decarburization of steel DIN 50601 Metallographic examination - Determination of the ferritic or austenitic grain size of ste
5、el and ferrous materials DIN V 17006-1 O0 Designation systems for steel - Additional symbols for steel names EN comprises 26 pages. No part of this standard may be reproduced without the prior permission of Ref. No. DIN EN 10085 : 2001 -0 hl Deutsches Institut fur Normung e. V., Berlin. Beuth Verlag
6、 GmbH, 10772 Berlin, Germany, s the exclusive right of sale for German Standards (DIN-Normen). English pricegroup 12 Sales No. 1112 11 .o1 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10085 March 2001 ICs 77.140.10 English version Nitriding steels Techn ical delivery conditions Aciers pour n
7、itruration - Conditions techniques de livraison Lieferbedingungen Nitriersthle - Technische This European Standard was approved by CEN on 2001 -01 -1 9. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the statu
8、s of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national stand- ards may be obtained on application to the Management Centre or to any CEN member. The European Standards exist in three official versions (English, French, German). A ver
9、sion in any other language made by translation under the responsibility of a CEN member into its 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, the Czech Republic, Denmark, Finland, F
10、rance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Management Centre: rue de Stassart 36, B-1050 Bruss
11、els O 2001. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN 10085 : 2001 E Page 2 EN 10085 : 2001 Contents 3 Foreword 4 1 3 - 3 4 4. I 4.2 5 5. I 5.2 6 6. I 6.2 6.3 7 7.1 7.2 7.3 7.4 7.5 7.6 8 8. I 8.2 9 Scopc 4 Normative referen
12、ces 5 Terms and definitions 6 6 6 Classification and designation Classification Designation 6 6 7 Information to be supplied by the purchaser Mandatory information Options Manufacturing process General Heat-treatment and surface condition at delivery Cast separation Requirements Chemical composition
13、, hardness and mechanical properties Shearability Structure Internal soundness Surface quality and decarburization Dimensions, tolerances on dimensions and shape 9 9 10 Inspection and testing Types and contents of inspection documents Specific inspection and testing Il Marking 22 Annex A (normative)
14、: Ruling sections for the mechanical properties 24 Annex B (normative): Supplementary or special requirements 25 Annex C (informative): Heat treatment 26 Annex D (informative): Dimensional standards applicable to products complying with this European Standard 26 Bibliography Page 3 EN 10085 : 2001 F
15、oreword This European Standard has been prepared by Technical Committee ECISSTC 23 “Steels for heat treatment, alloy steels and free-cutting steels - Qualities and dimensions”, the secretaxiat of which is held by DIN. This European Standard shall be given the status of a national standard, either by
16、 publication of an identical text or by endorsement, at the latest 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
17、implement 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 10085 : 2001 1 Scope 1.1 This European Standard specifies th
18、e technical delivery 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 sheevplate; - forgings (see NOTE 3) manufactured from the nitriding steels listed in Table 3 and supplied in une of the h
19、eat-treatment conditions 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 grad
20、es from EN 10083-1 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
21、term “forgings”. 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 require
22、ments of EN 1002 1 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,
23、 subsequent amendments 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
24、 testing - Part I: Test method (at ambient teinperature) “including Addendum AC1 :1990” EN 10020, Definition and classification 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:
25、 Steel names, principal 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 10163-2, Deliver
26、y requirements for suace condition of hot-rolled steel plates, wide fluts and sections - Part 2: Plates and wideflats EN 10204, Metallic products - Types of inspection documents (includes amendment Al:l995) EN 10221, Suface quality classes for hot-rolled bars and rods - Technical delive? conditions
27、CR 10260, Designation systems for steels - Additional symbols CR 10261, ECISS IC II - Iron and steel - Review of available methods of chernicul analysis EN IS0 377, Steel and steel products - Location und preparation of sumples and test pieces for mechanical testing EN IS0 6506- 1, Metallic material
28、s - Brinell hardness test - Part 1: Test method (IS0 6506-1:1999) EURONORM 103”, Microscopic determination of the ferritic or austenitic grain sise of steels EURONORM 104”, Determination of the depth of decarburization of non-alloy and low alloy structural steels IS0 14284, Steel and iron - Sampling
29、 and preparation of samples 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 a
30、greed at the time of ordering, until these EURONORMS have been adopted as European Standards, that these EURONORMS or the corresponding national standards should be applied. Page 6 EN 10085 : 2001 3.1 ruling section that section for which the specified mechanical properties apply Independent of the
31、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 the test pieces for the m
32、echanical 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 two or more of the nitride
33、 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 Designation 4.2.1 Steel name
34、s 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 relevant tables are alloca
35、ted 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. g. round or square); c
36、) the number of the dimensional standard; d) the dimensions and tolerances on dimensions and shape and, if applicable, letters denoting relevant special tolerances; Page 7 EN 10085 : 2001 e) the number of this European Standard (EN 10085); f) steel name or steel number (see 4.2); g) if appropriate,
37、the symbol for the heat treatment condition at delivery (see 6.2.1,6.2.2 and Table 1 ); h) if appropriate, the symbol for the surface condition at delivery (see 6.2.3 and Table 2); i ) if required, the type of inspection document in accordance with EN 10204 (see 8.1 ). EXAMPLE 20 rounds EURONORM 60
38、- 20x8000 EN 10085 - 34CrAlNi7-IO+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 indicate his wish to implement one of these options, the su
39、pplier 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 7.3.2); c) any requirement for internal soundness (see 7.
40、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 verification of the mechanical properties of reference test pieces
41、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 non-metallic inclusion content (see B.2). Page 8 EN 10
42、085 : 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 requirements in 6.2 and 6.3. 6.2 Heat-treatment and surface condition at delivery 6.2.1 Normal condition at deliv
43、ery 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-treatment condition If so agreed at the time of enquiry and order, the products shall be delivercd in one of the hcat
44、- 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 particular surface conditions given in Table 2, lines 3 to 6. 6.3 Cast separation The steels shall be delivered separ
45、ated 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, column 9, apply as appropriate for the particular heat-treatment condition. The requirements for mechanical prope
46、rties 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 of blades with a profile adapted to that of the product etc.) all steels are shearable in the condition “soft
47、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. Page
48、9 EN 10085 : 2001 7.4 Internal soundness The steel shall be free from internal defects likely to have an adverse effect (see B.3). 7.5 Surface quality and decarburization 7.5.1 All products shall have a workmanlike finish. 7.5.2 Minor surface imperfections, which may occur under normal manufacturing
49、 conditions, such as scores originating from rolled-in scale in the case of hot-rolled products, shall not be regarded as defects. 7.5.3 Where appropriate, requirements relating to surface quality of the products shall be agreed on at the time of enquiry and order, if possible with reference to European Standards. EN 10163-2 specifies requirements for the surface quality of hot-rolled sheetplate and wide flats. EN 10221 contains surface quality classification for hot-rolled bars and rods. NOTE It is more difficult to detect and elimininate surface discontinuities from coiled pr
