1、CEN EN*2L57-L 93 m 3404589 0054022 9TT m EUROPEAN STANDARD NORME EUROPENNE a EUROPISCHE NORM EN 2157-1 August 1993 UDC 669.14-4 : 621 73 : 620.1 62-777 : 629.7 Descriptors: Aircraft industry, forgings, die forgings, steels, specifications, generalities English version Aerospace series Steel Forging
2、stock and forgings Technical specifications Part 1 - General requirements Srie arospatiale Acier Produits destins la forge Pices forges et pices matrices Spcification technique Partie 1 - Exigences gnrales Luft- und Raumfahrt Stahl Schmiedevormaterial und Schmiedestcke Technische Lieferbedingungen T
3、eil 1 - Allgemeine Anforderungen This European Standard was approved by CEN on 1993-08-19. 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 li
4、sts 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 any other language made by translation under the resp
5、onsibility 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, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwa
6、y, 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 O 1993 Copyright reserved to CEN members Ref. No. EN 2157-1 : 1993 E CEN ENr21
7、57-1 93 3404589 0054023 836 Page 2 EN 2157-1 : 1993 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 received the ap
8、proval 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 by publication o
9、f an identical text or by endorsement, at the latest by February 1994, and conflicting national standards shall be withdrawn at the latest by February 1994. According to the CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denm
10、ark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents 1 2 3 4 5 6 7 8 9 10 11 12 Scope Normative references Definitions Quality assurance Traceability Freedom from defects Testing Marking Acc
11、eptance Inspection and test report Packing Wording of orders Page 3 3 4 5 6 6 6 8 8 8 9 9 CEN EN*2L57-L 93 3404589 0054024 772 9 Page 3 EN 2157-1 : 1993 1 Scope This standard defines the general requirements for the manufacture, inspection and testin of forging stock, hand forgings including forged
12、blocks and rings 1, die forgings and rolled rings 17 in steel. The specific requirements are defined in EN 21 57-2 and EN 21 57-3. The three standards EN 21 57-1 , EN 21 57-2 and EN 21 57-3 define the inspection level and the sampling frequency to be applied unless otherwise specified on the drawing
13、, order or inspection schedule. For aerospace purposes this standard shall be applied in conjunction with EN material standards unless otherwise specified on the drawing, order or inspection schedule. By agreement between the manufacturer and the purchaser, this standard can also be applied to other
14、 materials and conditions of supply not covered by EN material standards. This agreement shall be formalized by reference to this standard on the drawing, order or inspection schedule. 2 Normstive references This European Standard incorporates by dated or undated reference, provisions from other pub
15、lications. These normative references are cited at the apprcoriate 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 revis
16、ion. 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 2078 Aerospace series - Metallic materials - Manufacturing schedule - Inspection schedule -
17、 Inspection and test repon - Description and rules for use EN 21 57-2 Aerospace series - Steel - Forging stock and forgings - Technical specification - Pan 2 - Forging stock EN 21 57-3 Aerospace series - Steel - Forging stock and forgings - Technical specification - Part 3 - a Pre-production and pro
18、duction forgings 7 1 Hereafter described as “forgings. CEN ENxZL57-L 93 m 3404589 0054025 609 m Page 4 EN 2157-1 : 1993 3 Definitions 3.1 Purchaser Body which purchases the products from a manufacturer or a stockist in accordance with the requirements of the user. NOTE : The purchaser may also be th
19、e user. 3.2 User See EN 2000. 3.3 Cast Metal from the same final melting operation. 3.4 Campaign A continuous production sequence using the same equipment without alteration to the operating conditions. 3.5 Batch A batch consists of forging stock or forgings : - of the same form and nominal dimensio
20、ns or having the same drawing or pan number; - from the same cast; - from the same campaign; - in the same heat treatment condition; - from the same heat treatment charge or from the same heat treatment campaign which shall be specified in the manufacturing schedule. 3.6 Pre-production forgings Forg
21、ings produced to a particular design which qualify the method of manufacture, equipment configuration and, if appropriate, the forging stock source, which demonstrate that the requirements of the purchaser can be met. 3.7 Inspection schedule See EN 2078. 3.8 Manufacturing schedule See EN 2078. 3.9 I
22、nspection and test repon See EN 2078. CEN EN*2157-1 93 3404589 005402b 545 H 3.1 O Capability clause I o 750 5 8 S 1250 1 I10 Page 5 EN 2157-1 1993 Reference to capabiliw ciause signifies that sufficient rvid.nce of statistical nature with respect to the propemes under consideration can be submitted
23、 to show dut the requirements of the relevant standard may be met on the basis of a reduced amount of testing. sudi action in no way reduces the obligations of the manufacturer to fulfil all requirements. If subs- tiuting indicates that a product does not comply with the requirements the batch shall
24、 be rejected. 4 Quality assurance 4.1 Approval of quality system of manufacturers See EN 2000. e 4.2 Product qualification See material standard. 5 Manufacture 5.1 Forgings shall be made from forging stock complying with the relevant EN material standard and with EN 2157-2. 5.2 and inspection and te
25、sting of pre-production forgings as required by EN 21 57-3. Compliance with the requirements of the purchaser shall be demonstrated by the manufacture 5.3 Unless otherwise specified, the forging stock and forgings shall be supplied in the heat treatment condition specified in the material standard.
26、If there is more than one heat treatment condition contained in the material standard, the delivery condition shall be specified on the order or on the drawing. If a specific temperature (value and tolerance) is stated, that temperature shall be mandatory. If a temperature range is stated, a tempera
27、ture within that range reduced by the furnace tolerances shall be selected to give the required properties. e Unless otherwise specified, the charge shall be maintained at the temperature subject to the following tolerances (see table 11, for the period stated. Table 1 Selected temoerature OC I Tole
28、rances OC 750 i5 CEN EN+2257-2 93 = 3404587 0054027 482 Page 6 EN 2157-1 : 1993 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 from irregularities not complying with the requirements of the m
29、aterial standard or the order, or prejudicial to the subsequent manufacture or use of lhe product. Notwithstanding previous acceptance of products complying with this standard, any product that is found, at a later stage, to contain such defects, may be rejected. 8 Testing The tests required by the
30、material standard or the order shall be made in accordance with the requirements of the appropriate test standard. If a test standard does not exist, the method shall be agreed between the manufacturer and the purchaser. Unless otherwise specified on the order, the frequency of testing shall be as s
31、pecified in EN 2157-2 or EN 21 57-3. Where necessary, the location and the direction of the test samples shall be specified on the order. 8.1 Chemical comoosition It shall comply with the requirements of the relevant material standard and shall be determined on each cast. The samples taken for analy
32、sis 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 IS0 standard shall be used. If no IS0 standard exists, a fundamental method of chemical analysis shall be used. 8.2 Preparation of the tes
33、t samples and test pieces 8.2.1 Test samples for forgings 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 indicated on the drawing or the inspection schedule : a) test samples cut from
34、forgings; b) test samples forged integrally with the forgings; CI test samples forged separately from the same batch of forging stock as the forgings they represent. 8.2.2 between tbe manufacturer and the purchaser and shall be stated on the drawing or inspection schedule. Dimensions of test samples
35、 and associated test pieces representing forgings are to be agreed CEN EN*2157-1 93 H 3404589 0054028 318 Page 7 EN 2157-1 : 1993 8.2.3 The test sampies and associated test pieces shall be marked in such a manner that their idendity and orientation with respect to the product rnd the batch is mainta
36、ined. 8.2.4 Test samples removed from finished forgings shall not be further worked. 8.2.5 Should the test samples k cut from forgings, the purchaser shall specify in the drawing or inspection schedule the number of forgings to be cut up and the location from which the samples are to be taken. 8.3 H
37、eat treatment of test samples 8.3.1 treated with the batch of forgings they represent. Test sarnpies representing forgings to be supplied in any heat treated condition shall be heat Unless otherwise agreed between the manufacturer and the purchaser, samples shall not be cut from forgings before heat
38、 treatment. 8.3.2 Test samples cut from forgings in the finally heat treated condition shall not be further heat treated. 8.3.3 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
39、material standard. 8.4 Re-tests If any requirement is not met, retests shall be camed out under the following conditions. 8.4.1 Mechanical tests (tensile test, beam impact test, fracture toughness (Kt cl 1 If the test procedure or the test piece preparation is faulty, testing shall be re-applied at
40、the original frequency after identification of the cause of failure. When failure cannot be attributed to a faulty test procedure or to test piece preparation, additional identical test samples shall be selected at twice the original frequency. At least one of the samples shall be taken from the for
41、ging stock or forgings on which the incorrect result was obtained (unless already rejected by the manufacturer after suitable identification of the cause of the failure). 0 If all results are satisfactory, the batch shall be accepted. if one or more results are unsatisfactory, the batch shall be eit
42、her : - rejected, or - partially or fully re-heat treated and tested as a completely new batch except for chemical composition and inclusion content. a CEN EN*2157-L 93 3404589 0054029 254 Page 8 EN 2157-1 : 1993 8.4.2 Other tests SW EN 2157-3. 8.5 Re-heat treatment No product or test sample shall b
43、e fully re-heat treated more than once without the agreement of the purchaser. 9 Marking See : - EN 21 57-2 for forging stock; - EN 21 57-3 for forgings. Unless otherwise indicated on the drawing, order or inspection schedule, the method of marking shall be at the discretion of the manufacturer. The
44、 frequency of examination adopted by the manufacturer shall be sufficient to permit him to cenify compliance with the requirements. 1 O Acceptance If so required, the manufacturer shall inform the purchaser or his chosen agent of the dates planned for the extraction of samples and acceptance testing
45、, in order that these operations may be witnessed. 11 inspection and test report The manufacturer shall furnish mth each delivery an inspection and test report conforming to requirements of EN 2078 stating the following : - manufacturers name and address; - order number; - material standard number:
46、- drawing or part or product number; - quantity; - cast and batch num-; - condition of the mateu u delivered; - batch and/or test sarnpkr heat treatment, if appropriate; - results of the mandatory tests, re-tests and chemical analysis; - inspectors stamp. CEN ENx2L57-1 93 3404589 0054030 T7b = Page
47、9 EN 2157-1 : 1993 12 Packing If the purchaser does not specify any particular reauirements, the manufacturer shall apply a suitable protection to ensure that the proaucto are delivered in a satisfactory condition. The exterior of the packinq shall bear the following information : - name of purchase
48、r; - mass; - order number and sufficient information to enable the contents to be related to the relevant documentation. 13 Wording of orders The order shall clearly indicate : - quantities to be supplied; - dates of delivery; - material standard number: - delivery condition of the material; - dimensions and tolerances of forging stock, forging number or its drawing number with the relevant issue number, if applicable; - forwarding address; - manufacturing and inspection schedule references; - nature and type of packing, if required.
