1、BRITISH STANDARD AEROSPACE SERIES BS EN 2858-1:1994 Titanium and titanium alloys Forging stock and forgings Technical specification Part 1: General requirements The European Standard EN 2858-1:1994 has the status of a British Standard UDC 669.295-4:621.73:620.1:629.7BSEN2858-1:1994 This British Stan
2、dard, having been prepared under the directionof the Aerospace Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15 July 1994 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference ACE/61 Draft for co
3、mment 93/707235 DC ISBN 0 580 22390 6 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium
4、 Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland Na
5、tional Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Cer
6、tificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN2858-1:1994 BSI 10-1999 i Contents Page Cooperating organizations Inside front cover Nati
7、onal foreword ii Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Quality assurance 4 5 Manufacture 4 6 Traceability 4 7 Freedom from defects 4 8 Testing 4 9 Marking 6 10 Acceptance 6 11 Inspection and test report 6 12 Packaging 6 13 Wording of orders 6 National annex NA (informative)
8、 Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back cover Table 1 4BSEN2858-1:1994 ii BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language v
9、ersion of EN2858-1:1994, Aerospace series. Titanium and titanium alloys. Forging stock and forgings. Technical specification. Part 1: General requirements, published by the European Committee for Standardization (CEN). EN 2858-1:1994 was produced as a result of international discussion in which the
10、United Kingdom took an active part. 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 obligations. Summa
11、ry of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table
12、 on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2858-1 April 1994 UDC: 669.295-4:621.73:620.1:629.7 Descriptors: Aircraft industry, titanium, titanium alloys, forging, die forgings, specifications, generalities English version Aerospace series Titanium and titanium al
13、loys Forging stock and forgings Technical specification Part 1: General requirements Srie arospatiale Titane et alliages de titane Produits destins la forge, pices forges et pices matrices Spcification technique Partie 1: Exigences gnrales Luft- und Raumfahrt Titan und Titanlegierungen Schmiedevorma
14、terial und Schmiedestcke Technische Lieferbedingungen Teil 1: Allgemeine Anforderungen This European Standard was approved by CEN on1994-04-27. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a n
15、ational standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in
16、 any other language made by translation under the responsibility of a CEN member 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, Denmark, Finland, France, Germany, Greece, I
17、celand, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1994 Copyright reserved
18、to CEN members Ref. No. EN 2858-1:1994 EEN2858-1:1994 BSI 10-1999 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this standard has successively
19、 received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This standard was submitted for Formal Vote, and the result was positive. This European Standard shall be given the status of a national standard, either
20、by publication of an identical text or by endorsement, at the latest by October1994, and conflicting national standards shall be withdrawn at the latest by October1994. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria,
21、Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EN2858-1:1994 BSI 10-1999 3 1 Scope This standard specifies the general requirements for manufacture, inspection and testing of forgin
22、g stock, hand forgings 1)including forged blocks and rings 1) , die forgings and rolled rings 1)in titanium and titanium alloy. The specific requirements are specified in EN2858-2 and EN2858-3. The standards EN2858-1, EN2858-2 and EN2858-3 specify the inspection level and the sampling frequencies to
23、 be applied unless otherwise specified on the drawing, order or inspection schedule. This standard shall be applied in conjunction with the EN material standards unless otherwise specified on the drawing, order or inspection schedule. By agreement between the manufacturer and the purchaser, it may a
24、lso be applied to other materials or delivery conditions not covered by EN standards. The agreement shall be formalized by reference to this standard on the drawing, order or inspection schedule. 2 Normative references This European Standard incorporates by dated or undated reference, provisions fro
25、m other publications. These normative references 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 amendme
26、nt or revision. For undated references the latest edition of the publication referred to applies. EN 2000, Aerospace series Quality assurance EN aerospace products Approval of the quality system of manufacturers. EN 2003-10, Aerospace series Test methods for products in titanium and titanium alloys
27、Part 10: Sampling for determination of hydrogen content in titanium and titanium alloys 2) . EN 2078, Aerospace series Metallic materials Manufacturing schedule Inspection schedule Inspection and test report Description and rules for use. EN 2858-2, Aerospace series Titanium and titanium alloys Forg
28、ing stock and forgings Technical specification Part 2: Forging stock. EN 2858-3, Aerospace series Titanium and titanium alloys Forging stock and forgings Technical specification Part 3: Pre-production and production forgings. 3 Definitions For the application of this standard, the following definiti
29、ons apply: 3.1 purchaser body which purchases the products from a manufacturer or a stockist in accordance with the requirements of the user NOTEThe purchaser may also be the user. 3.2 user see EN 2000 3.3 charge for melting different products put into a furnace to be melted together 3.4 cast mass o
30、f metal from the same final melting operation 3.5 campaign a continuous production sequence using the same equipment without alteration to the operating conditions 3.6 batch a batch consists of forging stock or forgings: of the same form and nominal dimensions or having the same drawing or part numb
31、er; from the same cast; from the same forging campaign; in the same heat treatment condition; from the same heat treatment charge which shall be defined in the internal documentation of the manufacturer. 3.7 pre-production forgings forgings produced to a particular design which qualify the method of
32、 manufacture, equipment configuration and, if appropriate, the forging stock source, which demonstrate that the requirements of the purchaser can be met 1) Hereafter described as forgings 2) In preparation at the date of publication of this standardEN2858-1:1994 4 BSI 10-1999 3.8 inspection schedule
33、 see EN 2078 3.9 manufacturing schedule see EN 2078 3.10 inspection and test report see EN 2078 3.11 “capability clause” reference to “capability clause” signifies that sufficient evidence of a statistical nature with respect to the properties under consideration can be submitted to show that the re
34、quirements of the relevant standard may be met on the basis of a reduced amount of testing. Such action in no way reduces the obligations of the manufacturer to fulfill all requirements. If subsequent testing indicates that a product does not comply with the requirements, the batch shall be rejected
35、 4 Quality assurance 4.1 Approval of the quality system of manufacturers See EN 2000. 4.2 Product qualification See material standard. 5 Manufacture 5.1 Forgings shall be made from forging stock complying with the relevant material standard and with EN2858-2. 5.2 Unless otherwise specified, the meth
36、od of manufacture to be employed shall be at the discretion of the manufacturer. 5.3 If required, a manufacturing schedule shall be established and agreed for forging stock and forgings. After qualification of the forging stock and/or pre-production forgings no change in the manufacturing method sha
37、ll be made without previous written approval of the purchaser. 5.4 The forging stock and forgings shall be supplied in the heat treatment condition specified in the material standard. If otherwise agreed, or if there is more than one heat treatment condition in the material standard, the condition o
38、f supply shall be specified on the order or on the drawing. If a specific heat treatment temperature (value and tolerance) is stated, that temperature shall be mandatory. If a temperature range is stated, a temperature within that range reduced by the furnace tolerances shall be selected. Unless oth
39、erwise specified, the charge shall be maintained at the temperature, subject to the tolerances in the Table 1, for the period stated. Table 1 6 Traceability Each product shall be identifiable to its batch at all stages of manufacture and delivery. 7 Freedom from defects All products shall be free fr
40、om irregularities not complying with the requirements of the material standard or the order, or prejudicial to the subsequent manufacture or use of the product. Notwithstanding previous acceptance of products complying with this standard, any product that is found, at a later stage, to contain such
41、defects may be rejected. 8 Testing The tests required by the material standard, the order, the inspection schedule or the drawing shall be made in accordance with the requirements of the appropriate test standard. If no test standard exists, the method shall be agreed between the manufacturer and th
42、e purchaser. Unless otherwise specified on the order, the frequency of testing shall be as specified in EN2858-2 or EN2858-3. Where necessary, the location and the direction of the test samples shall be specified on the order. 8.1 Chemical composition It shall comply with the requirements of the rel
43、evant material standard and shall be determined on each cast. The samples taken for analysis shall be representative of the cast. The method of analysis shall be selected by the manufacturer, but in case of dispute, the method set out in the relevant ISO standard shall be used. If no ISO standard ex
44、ists, a fundamental method of chemical analysis shall be used. The hydrogen content determination shall be in accordance with EN2003-10. Tests shall be performed at a frequency of one per cast. Selected temperature Tolerances C C F 600 5 600 k F k 1 100 10EN2858-1:1994 BSI 10-1999 5 The results shal
45、l conform to the requirements of the relevant material standard. 8.2 Preparation of test samples and test pieces 8.2.1 Test samples for the tests required by the material standard shall be obtained by one or more of the following methods as agreed between the manufacturer and the purchaser and indic
46、ated on the drawing or the inspection schedule: a) test samples cut from forgings; b) test samples forged integrally with the forgings; c) test samples forged separately from the same batch of forging stock as the forgings they represent. 8.2.2 The test samples and associated test pieces shall be ma
47、rked in such a manner that their identity, location and orientation with respect to the forging stock, or forging and the batch are maintained. 8.3 Heat treatment of test samples Unless otherwise specified on the order or in the inspection schedule, the heat treatment of the test samples from forgin
48、g stock or forgings shall be in accordance with the reference heat treatment for forging stock or the heat treatment of use for forgings defined in the relevant material standard. 8.3.1 Unless otherwise agreed between the manufacturer and purchaser, test samples from forging stock or forgings or for
49、ged integrally with the forgings shall not be cut prior to heat treatment. 8.3.2 Separately forged test samples shall be heat treated with the batch they represent, regardless of its delivery condition. 8.3.3 Test samples cut from forgings in the finally heat treated condition shall not be further heat treated. 8.3.4 Test samples representing forgings supplied in other than the finally heat treated condition, shall be additionally heat treated in accordance with the requirements of the materia
