1、BRITISH STANDARD AEROSPACE SERIES BS EN 2070-3:1991 Specification for Aluminium and aluminium alloy wrought products Technical specification Part 3: Bar and section This European Standard EN 2070-3 has the status of a British StandardBSEN2070-3:1991 This British Standard was published under the auth
2、ority ofthe Standards Board and comesinto effect on 28June1991 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference ACE/61 Draft for comment 88/73521 DC ISBN 0 580 19151 6 Cooperating organizations The European Committee for Standardization, under whose s
3、upervision 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 Suomen Standardisoimisliito, r.y.
4、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 Unificazione Luxemburg Inspection du Tr
5、avail 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 suisse de normalisation United
6、Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN2070-3:1991 BSI 11-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Brief history 2 Text of EN 2070-3 3 National appendix A Inside back cover National appendix B
7、Inside back coverBSEN2070-3:1991 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the AerospaceStandards Policy Committee and is the English language version ofEN2070, “Aerospace series. Aluminium and aluminium alloy wrought products. Technical specific
8、ation” Part 3 “Bar and section”, published by the European Committee for Standardization (CEN). EN 2070-3 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 necessary provisions of a contract. Users of Brit
9、ish 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, theENtitle page, pages2 to10, an inside back cover a
10、nd 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 EN 2070-3 December 1989 UDC669.71.018.26-422:620.1:629.7 Key words:
11、 Aircraft industry, rolled products, semi-finished products, aluminium, aluminium alloys, metal bars, metal section, manufacturing, specifications English version Aerospace series Aluminium and aluminium alloy wrought products Technical specification Part 3: Bar and section Srie arospatiale Demi-pro
12、duitscorroysenaluminium et alliages daluminium Spcification technique Partie 3: Barres et profils Luft- und Raumfahrt HalbzeugausAluminiumund Aluminium-Knetlegierungen TechnischeLieferbedingungen Teil 3: Stangen und Pressprofile This European Standard was accepted by CEN on 1988-07-20. CEN members a
13、re bound to comply with the requirements of the CEN 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 such national standards may be obtained on ap
14、plication 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 under the responsibility of a CEN member into its own language and notified to CEN Central Secretaria
15、t 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, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee
16、 for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN 1989 Copyright reserved to all CEN members Ref. Nr EN 2070-3:1989 EEN2070-3:1989 BSI 11-1999 2 Brief history This European Standard has been prepared by the
17、 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 of the National Associations and the Official Services of the member countries of AECMA, prior to its
18、 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, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and Unite
19、dKingdom. Contents Page Brief history 2 1 Scope and field of application 3 2 References 3 3 Manufacturing 3 4 Batch size 3 5 Dimensions 3 6 Internal defects 3 7 External defects 3 8 Tensile test 4 9 Batch uniformity 5 10 Back end defect and peripheral coarse grain zone 6 11 Stress corrosion testing
20、7 12 Special tests 7 13 Marking 7 Annex A 9 Figure 1 9 Figure 2 9 Figure 3 9 Figure 4 9 Figure 5 9 Figure 6 9 Figure 7 10 Figure 8 10 Figure 9 10 Figure 10 10 Figure 11 10 Table 1 3 Table 2 4 Table 3 4 Table 4 5 Table 5 6 Table 6 7 Table 7 Summary of requirements forbarandsection 8EN2070-3:1989 BSI
21、11-1999 3 1 Scope and field of application The present standard defines the particular requirements for bar and section in aluminium and aluminium alloys produced by extrusion, drawing or rolling. This standard shall be used in conjunction with EN2070-1. 2 References EN 2002-1, Aerospace series Test
22、 methods for metallic materials Part 1: Tensile tests at room temperature 1) . EN 2002-7, Aerospace series Test methods for metallic materials Part 7: Hardness test 1) . EN 2002-16, Aerospace series Test methods for metallic materials Part 16: Penetrant flaw detection 1) . EN 2004-1, Aerospace serie
23、s Test methods foraluminium and aluminium alloys Part 1:Electrical conductivity testing 1) . EN 2004-2, Aerospace series Test methods for aluminium and aluminium alloys Part2:Ultrasonic testing of plates, forgings and extrusions. EN 2004-4, Aerospace series Test methods foraluminium and aluminium al
24、loys Part 4: Stress corrosion testing 1) . EN 2070-1, Aerospace series Aluminium and aluminium alloy wrought products Technical specification Part 1: General requirements. 3 Manufacture Unless otherwise specified, the method of manufacture to be employed shall be at the discretion of the manufacture
25、r, however, the following requirements shall be observed: Die quenching is permissible only when agreed in writing between the manufacturer and purchaser. The use of bridge die process is only permissible when agreed in writing between the manufacturer and purchaser. 4 Batch size SeeTable 1. Table 1
26、 5 Dimensions Dimensions and tolerances shall conform to the relevant semi-finished product standard or drawing. The frequency of examination shall be sufficient to permit the manufacturer to certify compliance with the requirements. 6 Internal defects When specified in the order or inspection sched
27、ule the products after solution treatment shall be ultrasonically tested in accordance with EN2004-2 and unless otherwise specified the acceptance criteria shall be class A. 7 External defects 7.1 Unless otherwise specified on the order or the inspection schedule, the surface quality of all products
28、 shall be determined by visual examination in accordance withTable 2. The frequency of examination shall be sufficient to permit the manufacturer to certify compliance with the requirements ofTable 2. 1) In preparation Temper a O, F, H. T. Mass b u3000kg u 2000kg or Number of products b u 250 u 200
29、a ALUMINUM ASSOCIATION designation b Whichever is the smaller.EN2070-3:1989 4 BSI 11-1999 Table 2 7.2 Additionally each rolled bar shall be subjected to penetrant flaw detection in accordance with EN2002-16. Bars shall be free from laps and cracks. 7.3 The surface roughness of the extruded section s
30、hall be measured perpendicular to the fibre direction. The readings shall meet the following requirements: Ra k 3,2 4m for section k 650 mm 2 Ra k 6,3 4m for section 650 mm 2 . The “capability clause” may be applied to this requirement. 8 Tensile test 8.1 Location of test samples 8.1.1 Bar 8.1.1.1 L
31、ongitudinal test Table 3 Score marks a Allowable if defect depth is u3% of D or a and u 0,3mm Die pick-ups a Smears a Superficial corrosion a Minor defects not impeding product use are allowable Inclusions a Not allowed after dressing Blisters b Rejected Handling damage a Allowable provided defect d
32、epth u3% of D or a and u 0,3mm Cracks b Rejected Extrusion stoppage and resumptionmarks b Rejected a Dressing allowed provided dimensions remain within tolerances. Surface appearance of the dressed zones shall be similar to that of the non-dressed surface. b Dressing is not allowed. Dimensions in mi
33、llimetersEN2070-3:1989 BSI 11-1999 5 8.1.1.2 Transverse test When this test is specified in the material standard the test specimen shall be selected as in the Annex A,Figure 6 toFigure 9. 8.1.2 Section 8.1.2.1 Longitudinal test For sections whose minor dimension in the thickest part are: k 40mm, se
34、eAnnex A,Figure 10, 40mm, seeAnnex A,Figure 11. 8.1.2.2 Transverse test When this test is specified in the material standard the location of the test specimen shall be defined by the purchaser. 8.2 Test method and definition of test piece Tensile tests shall conform to the requirements of EN2002-1.
35、For products with a thickness k 10mm, test specimens having a rectangular cross section and thickness equal to that of the product shall be used. Tests on thicker products shall be performed on proportional round test pieces of the form and one of the sizes indicated in EN2002-1. 8.3 Frequency SeeTa
36、ble 7. 8.4 Test results Unless otherwise specified on the order or in the inspection schedule, the test results shall be in conformity with the relevant material standard. 9 Batch uniformity Products supplied in the T.-condition shall be subject to either electrical conductivity measurement or hardn
37、ess testing. The method used shall be at the discretion of the manufacturer unless a specific method is specified by the purchaser. 9.1 Electrical conductivity measurement The conductivity measurement shall be carried out in accordance with EN2004-1. The values obtained shall conform with the requir
38、ements of the material standards and the maximumvariations shall be as follows If no values are stated in the material standard, the electrical conductivity shall demonstrate that the material has been properly heat treated and the above mentioned maximum variations shall apply. Measurement shall be
39、 applied to the following products: The number and position of measurements and sampling are given inTable 4. Table 4 k 1 MS/m per product, % k 1,5 MS/m per batch. Bar: with circular cross section having a diameter U 30mm, with square cross section having a sideU 25mm, with rectangular cross section
40、 having a widthU 25mm. Section: If their shape and dimensions make such measurement possible. Product Number and position of measurementper product Amount of tested products per batch Bar with circular cross section 1 per end on cross section Each product Bar with square or rectangular cross section
41、 1 per bar end on cross section Each product and 1 every metre along the bar 25% of products Section 1 per section end on cross section (or on flat surface at the end of the section) Each product and 25% of products 1 every metre along the sectionEN2070-3:1989 6 BSI 11-1999 9.2 Hardness testing Each
42、 product shall be hardness tested provided their shape and dimensions make such measurement possible. Testing shall be in accordance with EN2002-7. The number and location of measurements per product shall be: length k 4,5m: one end, length 4,5m: both ends. The values obtained shall conform with any
43、 values specified in the material standard. The product of lowest hardness shall be selected for the tensile test. 10 Back end defect and peripheral coarse grain zone Unless otherwise agreed, the back end of every extruded length shall be macrographically examined with respect to back end defects an
44、d, if required by the material standard, peripheral coarse grain. The “capability clause” may be applied to these requirements with the agreement of the purchaser. The maximum thickness of peripheral coarse grain zone for bar and regular solid section shall be in accordance withTable 5, level A or B
45、 as specified by the material standard. Table 5 Dimensions in millimetres D or a Maximum thickness of the peripheral coarse grain zone Level A Level B (D or a) u 1,5 1,5 100 4,0 8,0 a Use the lower value.EN2070-3:1989 BSI 11-1999 7 Examination for back end defect and coarse grain zone shall be on a
46、transverse section sample that has been solution heat treated in accordance with the material standard, suitably prepared and chemically etched. The choice of the etchant used to reveal the structure is left to the discretion of the manufacturer. Peripheral coarse grain thickness measurement on bar
47、and regular solid section shall be made perpendicular to and at the centre of the major dimensional face. Unless otherwise specified, measurement of thickness of peripheral coarse grain zone at corners of bar and section is not required. For hollow or complex sections the thickness of peripheral coa
48、rse grain zone shall be determined when specified on the order, drawing or inspection schedule and shall conform with limits agreed between manufacturer and purchaser. 11 Stress corrosion testing Stress corrosion testing shall be carried out in accordance with the requirements of EN2004-4 and the va
49、lues obtained shall conform with the requirements of the material standard. The frequency of testing shall be on a capability basis. The orientation of the testing and the location of the test sample shall be specified in the material standard, the order, drawing or inspection schedule. Unless otherwise specified on the order, drawing or inspection schedule the resistance to stress corrosion shall be demonstrated on a routine basis once on each batch by measurement of the electrical conductivit
