1、DEUTSCH E NORMSteel closed die forgingsGeneral technical delivery conditionsEnglish version of DIN EN 10254ICS 77.140.85Gesenkschmiedeteile aus Stahl- Allgemeine technischeLieferbedingungenApril 2000DINEN 10254Supersedes 01 N 7521, August 1974edition, DIN 7522, August 1944xedition, and DIN 7523-1,Ja
2、nuary 1972 edition.European Standard EN 10254: 1999 has the status of a DIN Standard.A comma is used as the decimal marker.National forewordThis standard has been prepared by ECISSITC 28.The responsible German body involved in its preparation was the Normenausschuss Eisen-, Blech- undMetal/waren (Ha
3、rdware, Tinware and Metal Products Standards Committee).AmendmentsDIN 7521, August 1974 edition, DIN 7522, August 1944xedition, and DIN 7523-1, January 1972 edition, havebeen superseded by the specifications of EN 10254.Previous editionsDIN7521: 1944x-08, 1974-08; DIN 7522: 1944x-08; DIN 7523-1: 194
4、4-08, 1972-01.EN comprises 15 pages. No part of this standard may be reproduced without the prior permission ofDINDeutsches Inslilul fOr Normung e. V., Berlin. Beulh Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).Ref. No. DI N EN 10254 : 2000-04E
5、nglish price group 08 Sales No. 110809.00EUROPEAN STANDARDNORME EUROPEENNEEUROpAISCHE NORMICS 77.140.85English versionSteel closed die forgingsGeneral technical delivery conditionsEN 10254September 1999Pieces estampees en acier Conditions techniques generales delivraisonGesenkschmiedeteile aus Stahl
6、 Allgemeine technische Lieferbedin gungenThis European Standard was approved by CEN on 1999-08-22.CEN members are bound to comply with the CEN/CENELEC Internal Regulationswhich stipulate the conditions for giving this European Standard the status of anational standard without any alteration.Up-to-da
7、te lists and bibliographical references concerning such national stand ards may be obtained on application to the Central Secretariat or to anyCEN member.The European Standards exist in three official versions (English, French, German).A version in any other language made by translation under the re
8、sponsibility of aCEN member into its own language and notified to the Central Secretariat has thesame status as the official versions.CEN members are the national standards bodies of Austria, Belgium, the CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, t
9、he Netherlands, Norway, Portugal, Spain, Sweden, Switzerland,and the United Kingdom.CENEuropean Committee for StandardizationComite Europeen de NormalisationEuropaisches Komitee fUr NormungCentral Secretariat: rue de Stassart 36, B-1050 Brussels 1999. CEN - All rights of exploitation in any form and
10、 by any meansreserved worldwide for CEN national members.Ref. No. EN 10254: 1999 EPage2EN 10254 : 1999ContentForeword 31 Scope 42 Normative references 43 Information to be supplied by the purchaser 54 Reference drawing.55 Tooling65.1 General 65.2 Tools specific to a particular purchaser. 65.3 Tools
11、not specific to a particular purchaser 65.4 Modification of the tools 76 Material and heat treatment 76.1 Material 76.2 Heat treatment 77 General technical conditions of manufacturing 87.1 Responsibility of the forging manufacturer 87.2 Surface conditions 87.3 Pre-production samples 87.4 Product mar
12、king 97.5 Delivery quantity deviations 98 Inspection and test procedures 98.1 General principle 98.2 Routine inspection 108.3 Additional inspection and testing 109 Inspection and testing documents 109.1 General 109.2 Submission 1110 Non-conformity 1110.1 Complaints 1110.2 Remedial action 11Annex A (
13、Informative) Information to be supplied by the purchaser at enquiry andorder stage 12Page3EN 10254 : 1999ForewordThis European Standard has been prepared by Technical Committee ECISSITC 28 “Steelforgings“, the secretariat of which is held by BSI.This European Standard shall be given the status of a
14、national standard, either by publication ofan identical text or by endorsement, at the latest by March 2000, and conflicting national standardsshall be withdrawn at the latest by March 2000.This European Standard has been prepared under a mandate given to CEN by the EuropeanCommission and the Europe
15、an Free Trade Association. This European Standard is considered tobe a supporting standard to those application and product standards which in themselves supportan essential safety requirement of a New Approach Directive and which make reference to thisEuropean Standard.According to the CEN/CENELEC
16、Internal Regulations, the national standards organizations of thefollowing countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,Netherlands, Norway, Portugal, Spain, Sweden, Switzerlan
17、d and the United Kingdom.Page4EN 10254: 19991 ScopeThis European Standard specifies the general delivery conditions for steel closed die forgings.These forgings are produced by blow or pressure of the heated product at a suitable temperature(hot or warm) in a die, which in the forming process shapes
18、 the material to the form of the die.Similar products such as warm extrusions and upset forgings, are also regarded as part of theprocess.This European Standard applies also to closed die forgings when their surface is partially treatedsubsequently by cold forming or coining, in order to improve the
19、 surface quality or to obtain moreprecise dimensional accuracy.This standard does not apply to open die forgings, process in which the tooling does not fullysursound the components produced.2 Normative referencesThis European Standard incorporates by reference provisions from specific editions of ce
20、rtainother publications. These normative references are cited at the appropriate points in the text andthe publications are listed hereafter. Subsequent amendments to, or revisions of, any of thesepublications apply to this European Standard only when incorporated in it by amendment orrevision. In t
21、he case of undated references, the most recent edition of publications referred toapplies.EN 10002-1EN 10002-5EN 10003-1EN 10045-1EN 10052EN 10109-1EN 10204EN 10243-1EN 10243-2CR 10261Metallic materials - Tensile testing - Part 1: Method of test (atambient temperature)Metallic materials - Tensile te
22、sting - Part 5: Method of test atelevated temperaturesMetallic materials - Hardness test - Brinell - Part 1: Test methodMetallic materials - Charpy impact test - Part 1: Test methodVocabulary of heat treatment terms of ferrous productsMetallic materials - Hardness test - Part 1 Rockwell test (scales
23、 A B - C - D - E - F - G - H K) and Rockwell superficial test (scales 15N, 30 N , 45 N, 15 T, 30 T and 45 T)Metallic products - Type of inspection documentsSteel die forgings - Tolerances on dimensions - Part 1 : Drop andpress forgingsSteel die forgings - Tolerances on dimensions - Part 2: Upsetforg
24、ings made on horizontal forging machinesECISS Information Circular 11 - Iron and steel - Review of availablemethods of chemical analysisEU 103EU 104ISO 3763ISO 4967ISO 4968ISO 4969Page 5EN 10254: 1999Micrographic examination of ferritic or austenite grain size of steelDetermination of the depth of d
25、ecarburization of non-alloy and low alloy structural steelsWrought steels - Macrographic methods for assessing the contentof non-metallic inclusionsSteel - Determination of content of non-metallic inclusions Micrographic method using standard diagramSteel - Macrographic examination by sulphur print
26、(Baumannmethod)Steel - Macrographic examination by etching with strong mineralacid3 Information to be supplied by the purchaserThe following information shall be supplied by the purchaser at the time of enquiry and order:a) full details of closed die forging through an approved drawing (see clause 4
27、) ;b) quantity of closed die forgings to deliver;c) all details about tooling as foreseen in clause 5 ;d) intended use of closed die forgings;e) material and heat treatment (see clause 6).Information supplied by the purchaser shall meet the characteristics required and shall preferablyrefer to Europ
28、ean Standards.NOTE: The informative annex A summarizes all the mandatory and optional information.4 Reference drawingThe approved drawing provided by the purchaser is normally the definitive document for theproduction and delivery of closed die forgings.The drawing of the closed die forging is :- ei
29、ther provided by the forging manufacturer after the finished component definition, descriptivenote, drawing or computer document, and approved by the purchaser, or- supplied by the purchaser before the preparation of the tooling dies and approved by theforging manufacturer.In the latter case the sim
30、ultaneous delivery of a finished part definition is desirable.Page6EN 10254 : 1999As close as possible co-operation between the purchaser and the forging manufacturer will serveto enable the latter, on the basis of his experience, to meet the functional requirements of thepurchaser in the best possi
31、ble way from a technical and economic point of view.This co-operation extends not only to the design of the closed die forging, the material and incertain cases also heat treatment, but also to the type and range of proposed testing of thedetermined qualities of the closed die forging for the assura
32、nce of consistent quality. The type andrange of the planned tests must at the time of the order be specified and included in the order, orin the closed die forging drawing as the case may be.Dimensions which have to be monitored by SPC (Statistical Process Control) must be agreedbetween forging manu
33、facturer and purchaser and indicated on the drawing prior to the order.The identification of surfaces for subsequent first machining are of decisive importance for thedimensioning and dimension control of the forging, and should therefore be indicated on thecomponent drawing.Dimensions are of import
34、ance in the function and dimensional control of the forging, andtolerances and agreed deviations from European Standard EN 10243 may only be applied todimensions which are included in the forging drawing.Dimensions for the greatest length, width, height and thickness of the forged component shouldal
35、ways be inserted, as they are needed for the determination of tolerances.Should the purchaser consider it necessary to apply special tolerances to particular dimensions,this must be stated in the order and be subject of an agreement between the forging manufacturerand the purchaser.5 Tooling5.1 Gene
36、ralThe basis for the production of the tooling, in particular of the dies, is the approved forgingdrawing. In view of the experience and expertise of the forging manufacturer it is recommendedthat he should be entrusted with the design and implementation of tooling.In special cases where the purchas
37、er wishes to supply the tools, the conditions of this supply(inspection, modification, adaptation to the machines) should be agreed and made part of theorder to take into account the suitability of the machine and the tooling (see 5.2 to 5.4).5.2 Tools specific to a particular purchaserIn the case o
38、f tools specific to a particular purchaser, conditions for obtaining and using them,shall be defined in a specific contract. The forging manufacturer may use tools for which thepurchaser has paid cost or part cost only for deliveries to this purchaser.5.3 Tools not specific to a particular purchaser
39、Tooling for standard or other forgings which are not specific to a particular purchaser such as:standard forged bolts, hooks, forged flanges, . , is manufactured and supplied by the forgingmanufacturer. The forging manufacturer can make use of this tooling without restriction.Page 7EN 10254: 19995.4
40、 Modification of the toolsDie and tool modifications at the purchasers request will involve the purchaser in additional costsfor labour, and other charges which may include the die material.6 Material and heat treatment6.1 Material6.1.1 Steel gradeThe designation of the steel grade is as far as poss
41、ible to be taken from the appropriate materialstandards. In other cases materials with similar specification shall be used.6.1.2 Purity standard, hardenabilityAny special requirements about purity and hardenability of the material, which exceed thoseincluded in the appropriate material standards, mu
42、st be stated at the time of order.6.1.3 Forging reduction ratioIf a particular forging reduction ratio of the material (component or bar) is required, this forgingreduction ratio shall be specified.6.1.4 Grain flowIf the purchaser requires a particular grain flow in the material in each section of t
43、he forging, thismust be included in the drawing of the forging as it is of considerable importance in determiningthe forging method.6.2 Heat treatmentIf post forging heat treatment is required it must be stated by the purchaser and specified on theforged component drawing 1) and in particular if it
44、is a direct treatment or separate conventionaltreatment.If it is agreed to test mechanical properties with test pieces, then the agreed location of these testpieces and their position shall be given either on the drawing or in testing specification.If heat treatment is required for the closed die fo
45、rgings, this shall be quoted using the terminologyin EN 10052.1) The relative requirements for heat treatment are also applicable when the nature of the steel requires afixed cooling rate (e.g. in the case of precipitation hardening steels).Page8EN 10254 : 19997 General technical conditions of manuf
46、acturing7.1 Responsibility of the forging manufacturerThe forging manufacturer is free to select forging operations, any heat treatment techniquesapplied, and any supplementary operations required to obtain conforming products in accordancewith his own practices.Any special requirements regarding th
47、e forging temperature range shall be indicated.Nevertheless, for products destined for specific applications, the order should state explicitly themandatory requirements which affect forging (such as rolling direction, decarburization etc.) andheat treatment stipulated by agreement between purchaser
48、 and the forging manufacturer.7.2 Surface conditions7.2.1 Surface finishClosed die forgings, unless agreed otherwise, are delivered in the as forged condition.Grinding of the surface is admissible as long as the use of the closed die forging is not impaired .The correction of defects by welding is o
49、nly permissible with the agreement of the purchaser.7.2.2 DecarburizationIn cases where decarburization is a critical issue the permitted decarburization depth shall bedefined by the purchaser prior to the order. In this case, the decarburization depth shall bedetermined according to EU 104.7.3 Pre-production samples7.3.1 Initial samplesIn certain circumstances, initial samples are reqUired before volume production begins. In thissituation there should be an agreement between forging manufacturer and purchaser on a quantityof closed die forgings which should be delivered to the pu
