1、BRITISH STANDARD AEROSPACE SERIES BS EN 2070-2:1991 Specification for Aluminium and aluminium alloy wrought products Technical specification Part 2: Sheet, strip formed profiles and plate This European Standard EN2070-2:1989 has the status of a British StandardBSEN2070-2:1991 This British Standard w
2、as published under the authority ofthe Standards Board and comesinto effect on 31 July 1991 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference ACE/61 Draft for comment 88/73521 DC ISBN 0 580 19150 8 Cooperating organizations The European Committee for S
3、tandardization, under whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries. Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suome
4、n 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 National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazio
5、ne Luxemburg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association su
6、isse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN2070-2:1991 BSI 10-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Brief history 2 Text of EN 2070-2 3 National appendix A Inside ba
7、ck cover National appendix B Inside back coverBSEN2070-2:1991 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 version of EN2070 “Aerospace series Aluminium and aluminium alloy wrought
8、 products Technical specification” Part2 “Sheet, strip formed profiles and plate”, published by the European Committee for Standardization (CEN). EN2070-2 was produced as a result of international discussion in which the UK took an active part. A British Standard does not purport to include all the
9、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. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, the
10、ENtitle page, pages2 to12, 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 on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN2070-2 December1
11、989 UDC669.71.018.26-41:620.1:629.7 Key words: Aircraft industry, rolled products, semi-finished products, aluminium, aluminium alloys, manufacturing, specifications, acceptance English version Aerospace series Aluminium and aluminium alloy wrought products Technical specification Part2: Sheet, stri
12、p formed profiles and plate Srie arospatiale Demi-produits corroys en aluminium et alliages daluminium Specification technique Partie 2: Tles minces, bandes profils plis et tles paisses Luft- und Raumfahrt Halbzeug aus Aluminium und Aluminium-Knetlegierungen Technische Lieferbedingungen Teil 2: Blec
13、he, Bander Bandprofile und Platten This European Standard was accepted by CEN on1988-07-20. CEN members are bound to comply with the requirements of CEN Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-
14、to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN 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
15、under the responsibility of a CEN member into its own language and notified to CEN Central Secretariat has the same status as the official versions. CEN members are the national standards organizations of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg
16、, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN 1990 Copyright reserved to all CEN members Ref. No. EN
17、2070-2 1989 EEN2070-2:1989 BSI 10-1999 2 Brief history 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 approval
18、 of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. According to the common CEN/CENELEC Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, I
19、celand, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. Contents Page Brief history 2 1 Scope and field of application 3 2 References 3 3 Batch size 3 4 Dimensions 3 5 Internal defects for plate 4 6 External defects 4 7 Tensile test 4 8 Bend te
20、st 6 9 Batch uniformity 6 10 Cladding 7 11 Fracture toughness and notch yield ratio R e /R p0,2tests for plate 8 12 Stress corrosion testing 9 13 Special tests 9 14 Marking 9 Table 1 3 Table 2 Acceptance conditions of the surface quality of sheets, strips, formed profiles 5 Table 3 6 Table 4 7 Table
21、 5 7 Table 6 8 Table 7 8 Table 8 9 Table 9 10 Table 10 Summary of requirements for sheet, strip, formed profiles, clad or unclad, and plate 11EN2070-2:1989 BSI 10-1999 3 1 Scope and field of application The present standard specifies the particular requirements for sheet, strip and formed profiles,
22、clad or unclad, and plate machined or unmachined in aluminium and aluminium alloy. This standard shall be used in conjunction with EN2070-1. 2 References EN 2002-1, Aerospace series Test methods for metallic materials Tensile tests at room temperature 1) . EN 2002-6, Aerospace series Test methods fo
23、r metallic materials Bend test 1) . EN 2002-7, Aerospace series Test methods for metallic materials Hardness test 1) . EN 2002-16, Aerospace series Test methods for metallic materials Penetrant flaw detection 1) . EN 2002-22, Aerospace series Test methods for metallic materials Plane strain fracture
24、 toughness testing 1) . EN 2002-23, Aerospace series Test methods for metallic materials Sharp notch tension testing with cylindrical specimens 1) . EN 2004-1, Aerospace series Test methods for aluminium and aluminium alloys Electrical conductivity testing 1) . EN 2004-2, Aerospace series Test metho
25、ds for aluminium and aluminium alloys Ultrasonic testing of plates, forgings and extrusions. EN 2004-4, Aerospace series Test methods for aluminium and aluminium alloys Stress corrosion testing 1) . EN 2004-5, Aerospace series Test methods for aluminium and aluminium alloys Control of cladding thick
26、ness and of the diffusion into the cladding 1) . EN 2070-1, Aerospace series Aluminium and aluminium alloy wrought products Technical specification General requirements. 3 Batch size SeeTable 1. Table 1 4 Dimensions Dimensions and tolerances shall conform to the relevant semi-finished product standa
27、rd or drawing. The frequency of examination shall be sufficient to permit the manufacturer to certify compliance with the requirements. 1) In preparation Semi-finished product Sheet, strip, formed profiles Plate Thickness a u 6mm 6mm25mm Temper a O, F, H. T. T. T. Mass u 3000 kg b u 1500 kg c Number
28、 of product 100 sheets or 20 coils of strip or 100 lengths for formed profiles 1 parent plate a ALUMINUM ASSOCIATION designation. b 3000 kg is permissible for a seamless coil of strip. c 1500 kg is permissible providing that the material is rolled to final thickness as one single plate.EN2070-2:1989
29、 4 BSI 10-1999 5 Internal defects for plate Unless otherwise specified on the order or the inspection schedule all plate over12mm in thickness shall be ultrasonically tested in accordance with EN2004-2 and shall satisfy the requirements of class A when the plates are delivered in the machined condit
30、ion they shall have been testing before machining. 6 External defects 6.1 Surface quality of sheet, strip and formed profiles Unless otherwise specified on the order or the inspection schedule the surface quality shall be determined by visual examination in accordance withTable 2. The frequency of e
31、xamination shall be sufficient to permit the manufacturer to certify compliance with the requirements ofTable 2. Penetrant flaw detection may be applied in accordance with EN2002-16, to verify the extent or existence of surface defects. 6.2 Surface quality and metal removal of machined plates 6.2.1
32、Surface finish shall conform to the roughness requirements specified on the order or inspection schedule. Plate shall be free from machining damage which may change the characteristics of the material. 6.2.2 The quantity of metal to be removed shall be agreed by the purchaser and the manufacturer. 6
33、.2.3 Witness of the removed metal quantity shall be given by the following method (or any other equivalent method): 10 mm diameter circles shall be hard stamped on the four edges of the plate, tangential to the face(s) to be machined. On each edge, at least3circles shall be stamped, one at each end
34、and at the middle of the length, after machining the remained of the circles give witness of the metal removed. 7 Tensile test 7.1 Tensile test samples shall be selected and tests carried out in accordance with the requirements of the material standard. The location of the test samples shall be in a
35、ccordance with the requirements ofTable 3. Test results shall meet the requirements of the material standard. Notwithstanding the requirements of the material standard, longitudinal tests on plate may be made the subject of the “capability clause” when the manufacturer can demonstrate to the satisfa
36、ction of the purchaser that he is able to consistently supply products with tensile properties which comply with the requirements of the material standard. 7.2 Tensile testing shall be performed in accordance with the requirements of EN2002-1. Tests on material up to12mm in thickness shall be made o
37、n specimens of full thickness. Tests on thicker product shall be performed on proportional round test pieces of the form and one of the sizes indicated in EN2002-1. The number of tests per batch is defined inTable 10. 7.3 Notwithstanding the requirements of the material standard, tensile tests in th
38、e ST direction on plate with thickness25mm a k 40mm shall be carried out only when required by the purchaser and stated on the order or on the inspection schedule. 7.4 When the material standard requires a R e /R p0,2test (see paragraph11.2) the tensile test in the relevant direction shall be carrie
39、d out. 7.5 For strip and sheet of a width less than300mm and where the material standard does not state values in the “L” direction, the values in the “LT” direction shall be used as the acceptance criteria. 7.6 For machined plate, the thickness of the plate before machining shall govern the require
40、ments for sampling, testing and the determination of acceptance limits. 7.7 For formed profiles, sampling and acceptance limits are identical to those of sheet and strip of the same thickness. If the profile does not allow test-piece sampling, the test sample shall be taken from the original batch(e
41、s) of sheet or strip and shall be included with each heat treatment batch of profiles.EN 2070-2:1989 BSI 10-1999 5 Table 2 Acceptance conditions of the surface quality of sheets, strips, formed profiles ab Nature of defects Unclad products Clad products Scratches Permitted if after grinding, the thi
42、ckness, stays within tolerances. Deep scratches reaching the core: rejected. Deep scratches not reaching the core: permitted if their number is not greater than5par m 2 . Fine but visible scratches admitted if their number is not greater than10par m 2 . Fine scratches after polishing: admitted. Laps
43、, tears Permitted if after grinding, the thickness stays within tolerances. Rejected if the affects both faces. If the defects one face only with no visible cracks or chaps: of scratches. Indentations, dark points Permitted Permitted if all the following conditions are satisfied: cladding undamaged
44、diameter of defect u3mm number of defect par dm 2u 5 number of defect par m 2u 20 Embedded particles, slivers Permitted if after grinding, the thickness stays withing tolerances. Inclusion through cladding (local etching test): no more than one single defect of u3mmis permitted for each2m 2 Inclusio
45、n not going through cladding: of indentations Diffusion into cladding Brown marks of copper diffusion in cladding. Permitted if those marks are not prejudical to subsequent usage. In case of dispute, the diffusion of copper in the cladding specified in clause10.2 shall be measured in accordance with
46、 EN2004-5. Cladding blisters Blisters visible on one face allowed if all of the following conditions are satisfied: surface of one blister u 30 mm 2 number of blisters u 2 per dm 2 total surface of blister per m 2u 1 cm 2 Duty appearance Only small elongated marks in the direction of rolling and giv
47、ing to the surface spots of a neatly greyish or milklike color. Permitted Permitted Fretting Oblong marks with rough appearance, generally black caused by sheet rubbing Where those marks occur during transport, they appear symmetrically on the faces of the 2 products in contact Permitted if all the
48、following conditions are satisfied: number of defects m 2u 2 total surface of defects m 2u 2cm 2 after careful grinding, thickness stays within tolerances. Permitted if all the following conditions are satisfied: undamaged cladding (local etching test) number of defects/ m 2u 2 total surface of defe
49、cts per m 2u2cm 2 Rolling streaks Blackish streaks of hot rolling lubriliant. Permitted if few marks and satisfactory general appearance. Mottling Permitted within limits of acceptance standards shown on reference samples located in the inspection department of the manufacturer. Mill roll marks Marks of mechanical origin in relief, occurring at regular intervals. Permitted if the thickness stays within tolerances. Oxidation marks White marks of starting or overall oxi
