1、 STD-BSI BS EN 10254-ENGL 1777 = lb2Libb9 LIBllb04 578 BRITISH STANDARD Steel closed die forgings - General technical delivery conditions The European Standard EN 10254.1999 has the status of a British Standard ICs 77.140.85 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS E
2、N 102541999 BS EN 10254:1999 Amd.No. National foreword Date Comments This British Standard is the English language version of EN 10254A999. The UK participation in its preparation was entrusted to Technical Committee ISE1, Wrought steels, which has the responsibility to: - aid enquirers to understan
3、d the text; - present to the responsible European committee any enquiries on the - monitor related inmaiional and European developments and promdgate interpretation, or proposals for change, and keep the UK interests informed them in the UK. A list of organizations represented on this committee can
4、be obtained on request to its secretary. Cross-references The British Sandars which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitied “International Standards Correspondence Index”, or by using the “Fi
5、nd“ faciiity of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a conimct Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal
6、obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 15 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. This British Standard, having been prepared under the direct
7、ion of the Engineering Sector Committee, was published under the authon of the Standards Committee and comes into effect on 15 December 1999 O BSI 12-1999 ISBN O 580 35151 3 STD=BSI BS EN 10254-ENGL 1999 1b24bL7 OBLb8Db 340 D EUROPEAN STANDARD NORME EUROPEENNE EUROPISCHE NORM EN 10254 September 1999
8、 ICs 77.140.85 English version Steel closed die forgings - General technical delivery conditions Pices estampes en acier - Conditions techniques gnrales de livraison Gesenkschmiedeteile aus Stahl - Allgemeine technische Lieferbedingungen This European Standard was approved by CEN on 22 August 1999.
9、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 references concerning sich national standards may be obtained on ap
10、plication to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by tramlation under the responsibility of a GEN member into its own language and notified to the Central Secretariat has
11、 the same status as tie official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITT
12、EE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Central Secretariat: rue de Stassart, 36 B-1050 Brussels O 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10254:1999 E Page 2 EN 10254: I999
13、 Content Foreword -. 3 i 2 3 4 5 5.1 5.2 5.3 5.4 6 6.1 6.2 7 7 .I 7.2 7.3 7.4 7.5 8 8.1 8.2 8.3 9 9.1 9.2 10.1 10.2 1 1 I io Scope -. 4 Normative references . 4 Information to be supplied by the purchaser . 5 Reference drawing 5 General . 6 6 6 Modification of the tools 7 Material and heat treatment
14、 . 7 Material . 7 Heat treatment 7 General technical conditions of manufacturing 8 8 Surface conditions 8 Pre-production samples 8 Product marking . 9 Inspection and test procedures . 9 9 Additional inspection and testing 10 Inspection and testing documents 10 General . 10 Submission 11 Non-conformi
15、ty . 11 Complaints 11 Remedial action 11 Tooling 6 Tools specific to a particular purchaser Tools not specific to a particular purchaser Responsibility of the forging manufacturer Delivery quantity deviations 9 Gen era I p ri n c I p le . Routine inspection 10 Annex A (informative) Information to be
16、 supplied by the purchaser at enquiry and order stage 12 O BSI 12-1999 Page 3 EN 10254:1999 Foreword This European Standard has been prepared by Technical Committee ECISSTTC 28, Steel forgings, the Secretariat of which is held by BSI. This European Standard shall be given the status of a national st
17、andard, either by publication of an identical text or by endorsement, at the latest by March 2000, and conflicting national standards shall be withdrawn at the latest by March 2000. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free
18、 Trade Association. This European Standard is considered to be a supporting standard to those application and product standards which in themselves support an essential safety requirement of a New Approach Directive and which make reference to this European Standard. According to the CENICENELEC Int
19、ernal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerlan
20、d and the United Kingdom. O BSI 12-1999 Page 4 EN 10254:1999 I Scope This 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 fo
21、rming process shapes the material to the form of the die. Similar products, such as warm extrusions and upset forgings, are also regarded as part of the process. This European Standard applies also to closed die forgings when their surface is partially treated subsequently by cold forming or coining
22、, in order to improve the surface quality or to obtain more precise dimensional accuracy. This standard does not apply to open die forgings, processes in which the tooling does not fully surround the components produced. 2 Normative references This European Standard incorporates by reference provisi
23、ons from specific editions of certain other publications. These normative references are cited at the appropriate points in the text and the publications are listed hereafter. Subsequent amendments to, or revisions of, any of these publications apply to this European Standard only when incorporated
24、in it by amendment or revision. In the case of undated references, the most recent edition of publications referred to applies. EN 10002-1 EN 10002-5 Metallic materials - Tensile testing - Part 1 : Method of test (at ambient temperature) Metallic materials - Tensile testing - Patt 5: Method of test
25、at elevated temperatures EN 10003-1 Metallic materials - Hardness test - Brinell - Patt 1 : Test method EN 10045-1 Metallic materials - Charpy impact test - Part 1 : Test method EN 10052 Vocabulary of heat treatment terms of ferrous products EN 10109-1 Metallic materials - Hardness test - Part 1 Roc
26、kwell test (scales A - B - C - D - E - F - G - H - K) and Rockwell superficial test (scales 15 N, 30 N ,45 N, 15 T, 30 T and 45 T) EN 10204 Metallic products - Type of inspection documents EN 10243-1 EN 10243-2 CR 10261 Steel die forgings - Tolerances on dimensions - Part 1 : Drop and press forgings
27、 Steel die forgings - Tolerances on dimensions - Part 2: Upset forgings made on horizontal forging machines ECISS Information Circular 11 - Iron and steel - Review of available methods of chemical analysis O BSI 12-1 999 STD-BSI BS EN 2025Li-ENGL 2777 m Lb24bb7 OLbLO 872 = EU 103 EU 104 IS0 3763 IS0
28、 4967 IS0 4968 IS0 4969 Page 5 EN 10254:1999 Micrographic examination of ferritic or austenite grain size of steel Determination of the depth of decarburization of non-alloy and low- alloy structural steels Wrought steels - Macrographic methods for assessing the content of non-metallic inclusions St
29、eel - Determination of content of non-metallic inclusions - Micrographic method using standard diagram Steel - Macrographic examination by sulphur print (Baumann method) Steel - Macrographic examination by etching with strong mineral acid 3 information to be supplied by the purchaser The following i
30、nformation 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 clause4); 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
31、; e) material and heat treatment (see clause 6). Information supplied by the purchaser shall meet the characteristics required and shall preferably refer to European Standards. NOTE: The informative annex A summarizes all the mandatory and optional information. 4 Reference drawing The approved drawi
32、ng provided by the purchaser is normally the definitive document for the production and delivery of closed die forgings. The drawing of the closed die forging is: - either provided by the forging manufacturer after the finished component definition, descriptive note, drawing or computer document, an
33、d approved by the purchaser; or - supplied by the purchaser before the preparation of the tooling dies and approved by the forging manufacturer. In the latter case the simultaneous delivery of a finished pari definition is desirable. As close as possible co-operation between the purchaser and the fo
34、rging manufacturer will serve to enable the latter, on the basis of his experience, to meet the functional requirements of the purchaser in the best possible way from a technical and economic point of view. O BSI 12-1999 Page 6 EN 1 0254: 1999 This co-operation extends not only to the design of the
35、closed die forging, the material and in certain cases also heat treatment, but also to the type and range of proposed testing of the determined qualities of the closed die forging for the assurance of consistent quality. The type and range of the planned tests must at the time of the order be specif
36、ied and included in the order, or in the closed die forging drawing as the case may be. Dimensions which have to be monitored by SPC (Statistical Process Control) must be agreed between forging manufacturer and purchaser and indicated on the drawing prior to the order. The identification of surfaces
37、 for subsequent first machining is of decisive importance for the dimensioning and dimension control of the forging, and should therefore be indicated on the com ponen t drawing . Dimensions are of importance in the function and dimensional control of the forging, and tolerances and agreed deviation
38、s from European Standard EN 10243 may only be applied to dimensions which are included in the forging drawing. Dimensions for the greatest length, width, height and thickness of the forged component should always be inserted, as they are needed for the determination of tolerances. Should the purchas
39、er 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 manufacturer and the purchaser. 5 Tooling 5.1 General The basis for the production of the tooling, in particular of the dies, is the appr
40、oved forging drawing. In view of the experience and expertise of the forging manufacturer it is recommended that he should be entrusted with the design and implementation of tooling. In special cases where the purchaser wishes to supply the tools, the conditions of this supply (inspection, modificat
41、ion, adaptation to the machines) should be agreed and made part of the order to take into account the suitability of the machine and the tooling (see52 to 5.4). 5.2 Tools specific to a particular purchaser In the case of tools specific to a particular purchaser, conditions for obtaining and using th
42、em shall be defined in a specific contract. The forging manufacturer may use tools for which the purchaser has paid cost or part cost only for deliveries to this purchaser. 5.3 Tools not specific to a particular purchaser Tooling for standard or other forgings which are not specific to a particular
43、purchaser such as: standard forged bolts, hooks, forged flanges, ., is manufactured and supplied by the forging manufacturer. The forging manufacturer can make use of this tooling without restriction. O BSI 12-1 999 Page 7 EN 1 0254: 1999 5.4 Modification of the tools Die and tool modifications at t
44、he purchasers request will involve the purchaser in additional costs for labour, and other charges which may include the die material. 6 Material and heat treatment 6.1 Material 6.1.1 Steel grade The designation of the steel grade is as far as possible to be taken from the appropriate material stand
45、ards. In other cases materials with similar specification shall be used. 6.1.2 Purity standard, hardenability Any special requirements about purity and hardenability of the material, which exceed those included in the appropriate material standards, must be stated at the time of order. 6.1.3 Forging
46、 reduction ratio If a particular forging reduction ratio of the material (component or bar) is required, this forging reduction ratio shall be specified. 6.1.4 Grain flow If the purchaser requires a particular grain flow in the material in each section of the forging, this must be included in the dr
47、awing of the forging as it is of considerable importance in determining the forging method. 6.2 Heat treatment If post forging heat treatment is required it must be stated by the purchaser and specified on the forged component drawing ” and in particular if it is a direct treatment or separate conve
48、ntional treat ment. If it is agreed to test mechanical properties with test pieces, then the agreed location of these test pieces and their position shall be given either on the drawing or in the testing specification. If heat treatment is required for the closed die forgings, this shall be quoted u
49、sing the terminology in EN 10052. ) The relative requirements for heat treatment are also applicable when the nature of the steel requires a fixed cooling rate (e.g. in the case of precipitation hardening steels). O BSI 12-1999 Page 8 EN 10254:1999 7 General technical conditions of manufacturing 7.1 Responsibility of the forging manufacturer The forging manufacturer is free to select forging operations, any heat treatment techniques applied, and any supplementary operations required to obtain conforming products in accordance with his own practices. Any special requireme
