1、DEUTSCHE NORM March 1998 Valve steels and alloys for internal combustion engines English version of DIN EN 10090 I DIN - I EN 10090 ICs 27.020; 77.1 40.1 O Descriptors: Steel, valves steel, internal combustion engines. Ventilsthle und -1egierungen fr Verbrennungskraftmaschinen Supersedes DIN 17480,
2、May 1992 edition. European Standard EN 10090 : 1997 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 its preparation was the Normenausschu Eisen und Stahl (Steel and Iron
3、 Standards Committee), Technical Committee Ventilwerkstoffe. This standard is based on IS0 683-15, from which it deviates as follows: a) Steel grades X50 CrSi 8 2 and NiCr 15 Fe 7 TiAl have been dropped and grade X40CrSiMolO-2 has been included. b) The reference values for creep strength for grade X
4、33CrNiMnN23-8 have been changed. The DIN Standards corresponding to the EURONORMs referred to in clause 2 of the EN are as follows: EURONORM 17 DIN 591 1 O EURONORM 103 DIN 50601 EURONORM 60 DIN 1 O1 3-1 Amendments DIN 17480, May 1992 edition, has been superseded by the specifications of EN 1 O090 P
5、revious editions DIN 17480: 1984-09, 1992-05. National Annex NA Standards referred to (and not included in Normative references) DIN 1013-1 DIN 50601 DIN 591 1 O IS0 683-1 5 : 1991 Hot rolled round steel for general applications - Dimensions and tolerances Metallographic examination - Determination
6、of the ferritic or austenitic grain size of steel and ferrous materials Steel wire rod - Dimensions, tolerances and mass Heat-treatable steels, alloy steels and free-cutting steels - Valve steels for internal combustion engines EN comprises 15 pages. No pari of this standard may be reproduced withou
7、t the prior permission of Ref. No. DIN EN 10090 : 1998-0 V Deutsches Institut fr Nonung e. V., Berlin. Luth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). English price group 10 Sales No . . 1110 06.98 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM
8、 EN 10090 December 1997 ICs 27.020; 77.140.1 O Descriptors: Steel, valves steel, internal combustion engines. English version Valve steels and alloys for internal com bust ion engines Aciers et alliages pour soupapes de moteurs combustion interne Verbrennungskraftmaschinen Ventilsthle und -1egierung
9、en fr This European Standard was approved by CEN on 1998-01 -02. CEN members 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 re
10、ferences concerning such national standards may be obtained on application 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
11、into its own language and notified to the Central Secretariat has the same 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,
12、Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, 8-1050 Brussels O 1997. CEN - All rights of exploitation in any form and by any means reserv
13、ed worldwide for CEN national members. Ref. No. EN 10090 : 1997 E Page 2 EN 1 O090 : 1997 Contents Page Foreword 2 1 Scope 2 2 Normative references 2 3 Definitions 4.1 Classification 3 5 Information to be supplied by the purchaser 4 5.1 Mandatory information . 4 5.2 Supplementary information . 4 6 M
14、anufacturing process . 4 6.1 Melting process 4 6.2 Manufacture of the product . 4 6.3 Heat treatment condition and surface finish at the time of delivery 4 4.2 Designation 3 Page 7 Requirements . 5 7.1 Chemical composition . 5 7.2 Mechanical properties 7.3 Internal and external condition 7.4 Dimensi
15、ons and toleran 8 Testing . 6 8.1 Agreement of tests and inspection documents 6 8.2 Numberoftests 6 8.3 Selection and preparation of samples and test pieces 6 8.4 Test methods 6 8.5 Retests . 7 8.6 Certification of the tests . 7 10 Complaints 7 Annex A (informative) Technical supplement . . 11 9 Mar
16、king 7 Foreword This European Standard has been prepared by Technical Committee ECCIS/TC 23 Stainless steels, 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, and conflictin
17、g national standards withdrawn, by August 1998 at the latest. In accordance with the CENKENELEC Internal Regulations, the national standards organizations of the follow- ing countries are bound to implement this European Standard: Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germa
18、ny, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. 1 Scope 1 .I materials are used for intake and exhaust valves in reciprocating internal combustion engines. It is applicable to bars, wire, rod and forgings and for
19、 the surface finishes listed in note 3 of 6.3. This European Standard applies to the grades of wrought high-alloy materials listed in table 1. These valve 1.2 This European Standard does not apply to alloys resistant to wear and corrosion which are used to protect valve seat surfaces. 1.3 In additio
20、n to the specifications of this European Standard, the general technical delivery requirements of EN 10021 are applicable, unless otherwise specified. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative referen
21、ces are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, 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 la
22、test edition of the publication referred to applies. EN 10002-1 Metallic materials - Tensile testing - Part 1 : Method of test at ambient temperature (including Addendum AC 1 : 1990) EN 10002-5 Metallic materials - Tensile testing - Part 5: Method of test at elevated temperature EN 10003-1 Metallic
23、materials - Hardness test - Brinell - Part 1 : Test method EN 10020 Definition and classification of grades of steel Page 3 EN 1 O090 : 1997 EN 10021 EN 10027-1 EN 10027-2 EN 10052 EN 10079 EN 10109-1 EN 10204 EN 10221 EN IS0 377 prEN 10278 CR 10261 IS0 14284 : 1997 EURONORM 17l) EURONORM 601) EURON
24、ORM 103l) General technical delivery requirements for steel and iron products Designation systems for steels - Part 1 : Steel names, principal symbols Designation systems for steels - Part 2: Numerical system Vocabulary of heat treatment terms for ferrous products Definition of steel products Metall
25、ic materials - Hardness test - Part 1 : Rockwell methods (scales A, B, C, D, E, F, G, H, K) and methods N and T (scales 15N, 30N, 45N, 15T, 30T, 45T) Metallic products - Types of inspection documents (includes Amendment Al : 1995) Surface quality classes for hot-rolled bars and rods - Technical deli
26、very conditions Steel and steel products - Location and preparation of samples and test pieces for me- chanical testing (IS0 377 : 1997) Dimensions and tolerances of bright steel products Iron and steel - Review of available methods of chemical analysis Steel and iron - Sampling and preparation of s
27、amples for the determination of chemical composition Rod in general purpose non-alloy steel for cold drawing - Dimensions and tolerances Hot rolled round bars for general purposes Microscopic determination of the ferritic or austenitic grain size of steels 3 Definitions For the purposes of this Euro
28、pean Standard, the following definition applies in addition to the definitions given in EN 10020, EN 10021, EN 10052, EN 10079, EN IS0 377, and IS0 14284: valve materials: Steels and non-ferrous metal alloys which exhibit, to varying degrees, resistance to: - heat, - thermal cycling, - corrosion - o
29、xidation, - fatigue loading, - impact, - adhesive and abrasive wear. Valve materials are therefore used for the manufacture of intake and exhaust valves in reciprocating internal combustion engines. 4 Classification and designation 4.1 Classification 4.1.1 All steel grades are classified as alloyed
30、special steels according to EN 10020. 4.1.2 Valve materials are divided into two categories based upon their structure, which is itself determined by the general chemical composition: - martensitic steels, which are primarily used for intake valves and the stem portion of exhaust valves; - austeniti
31、c alloys, which are primarily used for exhaust valves. 4.2 Designation 4.2.1 Names For the steel grades covered by this European Standard, the steel names as given in the relevant tables are assigned in accordance with EN 10027-1. NOTE: The first few chemical symbols indicate the main alloy elements
32、 and the figure immediately following them indicates the average content of these alloys, followed by the chemical symbols of the remaining alloying elements. 4.2.2 Numbers For the steel grades covered by this European Standard, the steel numbers as given in the relevant tables are in accordance wit
33、h EN 10027-2. l) It may be agreed at the time of ordering, until this EURONORM has been adopted as a European Standard, that either this EURONORM or a corresponding national standard should be applied. Page 4 EN 1 O090 : 1997 NOTE: The numbers are formed as set out in EN 10027-2, with the number 1 o
34、r 2 indicating the material group. Number 2 designates the material group which comprises chemically resistant and high temperature or heat resistant nickel and cobalt alloys. 5 Information to be supplied by the purchaser 5.1 Mandatory information The following information shall be supplied by the p
35、urchaser at the time of ordering: a) the quantity to be delivered; b) the designation of the product form (e.g. bar); c) the number of the dimensional standard (e.g. EURONORM 60); d) the dimensions and tolerances on dimensions and shape; e) reference to this European Standard (EN 10090); f) name or
36、number of the steel or alloy grade (see table 1); g) the heat treatment condition on delivery (see 6.3); h) all other necessary details including the intended method of processing (hot extrusion or upsetting with electric resistance heating); i) if required, the type of inspection document in accord
37、ance with EN 10204 (see 8.1). EXAMPLE: 1 O t round bars of 30 mm diameter, dimensional tolerances as specified in EURONORM 60, of a steel grade according to EN 1 O090 with the name X45CrSi9-3 and the number 1.471 8, in the soft annealed condition (+A), intended for hot extrusion, inspection document
38、 3.1 .B as specified in EN 10204: 1 O t rounds EURONORM 60-30 steel EN 1009O-X45CrSi9-3+A, for hot extrusion EN 10204-3.1 .B or 1 O t rounds EURONORM 60-30 steel EN 10090-1.471 8+A, for hot extrusion EN 10204-3.1 .B 5.2 Supplementary information The following supplementary information may be supplie
39、d by the purchaser and be agreed with the manufac- turer: a) product analysis (see 7.1.3); b) verification of mechanical properties in the reference heat treatment condition (see A.2.4); c) limitations on non-metallic inclusions (see 7.3.1); d) surface quality class for hot-rolled round bars and rod
40、s (see 7.3.5); e) other tests (see 8.2.2); f) special marking (see 9.1). 6 Manufacturing process 6.1 Melting process 6.1.1 manufacturer. Unless otherwise agreed in the order, the type of melting process (see 6.1.2) is at the discretion of the 6.1.2 The non-ferrous metal alloys NiFe25Cr20NbTi and NiC
41、r2OTiAl are usually produced by remelting proc- esses. 6.2 Manufacture of the product The manufacturing process route of the product shall be at the manufacturers discretion. 6.3 Heat treatment condition and surface finish at the time of delivery The heat treatment condition and surface finish of th
42、e products at the time of delivery shall be agreed when ordering. Page 5 EN 1 O090 : 1997 NOTE 1 : Valve materials intended for subsequent processing by metal forming are normally ordered in one of the heat treatment conditions indicated in table 3. NOTE 2: When they have become finished components,
43、 the materials are used, depending on their chemical composition, in the quenched and tempered or the precipitation-hardened condition (see tables A.l and A.5). - turned and polished; - turned and ground; - ground; - ground and polished; - turned and ground, then polished; - as rolled. NOTE 3: Valve
44、 materials are mainly supplied in bar form, with one of the following surface finishes: 7 Requirements 7.1 Chemical composition 7.1.1 fications in table 1. The chemical composition of the materials, determined in the cast analysis, shall conform to the speci- 7.1.2 Slight deviations from the specifi
45、ed limits may be permitted by the purchaser if the material character- istics are only affected to a negligible extent. 7.1.3 At the time of ordering, it may be agreed that the result of the product analysis, with the permissible deviations given in table 2, shall serve as proof that the limiting va
46、lues for the cast analysis in table 1 have been complied with. 7.2 Mechanical properties Table 3 specifies values of the mechanical properties at room temperature for the soft annealed and quenched and tempered conditions of martensitic steels and for the controlled cooled and/or quenched conditions
47、 of austenitic materials (see also tables A.l to A.4). 7.3 Internal and external condition 7.3.1 ing. Any limitations on non-metallic inclusions for valve materials shall be agreed upon at the time of order- 7.3.2 The valve materials shall not have any internal defects detrimental to valve fabricati
48、on and use of the valves. 7.3.3 ance with EURONORM 103, although isolated areas containing larger grains shall be tolerated. NiCr2OTiAl and NiFe25Cr20NbTi alloys shall have a grain size of 4 and/or finer when tested in accord- 7.3.4 defects shall not exceed the tolerance class hl 1 of prEN 10278. In
49、 the case of bars which were turned or ground during finishing (see 6.3, note 3), the depth of surface 7.3.5 In all other cases, the requirements governing surface quality shall be agreed upon at the time of order- ing. For round bars and rods to be delivered in the hot-rolled surface condition, these requirements should be based on EN 10221 where appropriate. 7.4 Dimensions and tolerances The dimensions and tolerances for the product shall comply with the requirements agreed upon at the time of ordering. The agreements shall, as far as possible, be based on corresponding
