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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 Standard BS EN 2070-3:1991 This British Standard was published under the a
2、uthority of the Standards Board and comes into effect on 28 June 1991 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
3、whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries. AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardisoimisliito, r.
4、y. FranceAssociation franaise de normalisation GermanyDeutsches Institut fr Normung e.V. GreeceHellenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxemburgInspection du Travai
5、l et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola de Normalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBri
6、tish Standards Institution Amendments issued since publication Amd. No.DateComments BS EN 2070-3:1991 BSI 11-1999i Contents Page Cooperating organizationsInside front cover National forewordii Brief history2 Text of EN 2070-33 National appendix AInside back cover National appendix BInside back cover
7、 BS EN 2070-3:1991 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of EN 2070, “Aerospace series. Aluminium and aluminium alloy wrought products. Technical specification” Part
8、 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 British Standar
9、ds 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, pages i and ii, the EN title page, pages 2 to 10, an inside back cover and a
10、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 UDC 669.71.018.26-422:620.1:629.7 Key words: Ai
11、rcraft 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-produi
12、ts corroys en aluminium et alliages daluminium Spcification technique Partie 3: Barres et profils Luft- und Raumfahrt Halbzeug aus Aluminium und Aluminium-Knetlegierungen Technische Lieferbedingungen Teil 3: Stangen und Pressprofile This European Standard was accepted by CEN on 1988-07-20. CEN membe
13、rs are 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 o
14、n 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 under the responsibility of a CEN member into its own language and notified to CEN Central Secret
15、ariat 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 United Kingdom. CEN European Comm
16、ittee 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 E EN 2070-3:1989 BSI 11-1999 2 Brief history This European Standard has been prepared
17、 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 of the National Associations and the Official Services of the member countries of AECMA, prior
18、 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, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland an
19、d United Kingdom. Contents Page Brief history2 1Scope and field of application3 2References3 3Manufacturing3 4Batch size3 5Dimensions3 6Internal defects3 7External defects3 8Tensile test4 9Batch uniformity5 10Back end defect and peripheral coarse grain zone6 11Stress corrosion testing7 12Special tes
20、ts7 13Marking7 Annex A9 Figure 19 Figure 29 Figure 39 Figure 49 Figure 59 Figure 69 Figure 710 Figure 810 Figure 910 Figure 1010 Figure 1110 Table 13 Table 24 Table 34 Table 45 Table 56 Table 67 Table 7 Summary of requirements for bar and section8 EN 2070-3:1989 BSI 11-19993 1 Scope and field of app
21、lication 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 EN 2070-1. 2 References EN 2002-1, Aerospace series Test methods for metallic materials P
22、art 1: Tensile tests at room temperature1). EN 2002-7, Aerospace series Test methods for metallic materials Part 7: Hardness test1). EN 2002-16, Aerospace series Test methods for metallic materials Part 16: Penetrant flaw detection1). EN 2004-1, Aerospace series Test methods for aluminium and alumin
23、ium alloys Part 1: Electrical conductivity testing1). EN 2004-2, Aerospace series Test methods for aluminium and aluminium alloys Part 2: Ultrasonic testing of plates, forgings and extrusions. EN 2004-4, Aerospace series Test methods for aluminium and aluminium alloys Part 4: Stress corrosion testin
24、g1). 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 manufacturer, however, the following requirements
25、 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 See Table 1. Table 1 5 Dimensions Dimensions and toleranc
26、es 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 schedule the products after solution treat
27、ment shall be ultrasonically tested in accordance with EN 2004-2 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 shall be determined by visual exami
28、nation in accordance with Table 2. The frequency of examination shall be sufficient to permit the manufacturer to certify compliance with the requirements of Table 2. 1) In preparation TemperaO, F, H . . .T . . . Massbu 3 000 kgu 2 000 kg or Number of productsbu 250u 200 a ALUMINUM ASSOCIATION desig
29、nation b Whichever is the smaller. EN 2070-3:1989 4 BSI 11-1999 Table 2 7.2 Additionally each rolled bar shall be subjected to penetrant flaw detection in accordance with EN 2002-16. Bars shall be free from laps and cracks. 7.3 The surface roughness of the extruded section shall be measured perpendi
30、cular to the fibre direction. The readings shall meet the following requirements: Ra k 3,2 4m for section k 650 mm2 Ra k 6,3 4m for section 650 mm2. 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 Longitudinal test Table 3 Sco
31、re marksaAllowable if defect depth is u 3 % of D or a and u 0,3 mm Die pick-upsa Smearsa Superficial corrosiona Minor defects not impeding product use are allowable InclusionsaNot allowed after dressing BlistersbRejected Handling damageaAllowable provided defect depth u 3 % of D or a and u 0,3 mm Cr
32、acksbRejected Extrusion stoppage and resumption marksb 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 millimeters EN 2070-3:1989 BSI 11-199
33、95 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 to Figure 9. 8.1.2 Section 8.1.2.1 Longitudinal test For sections whose minor dimension in the thickest part are: k 40 mm, see Annex A, Figure 10, 40 mm, se
34、e Annex 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 EN 2002-1. For products with a thick
35、ness k 10 mm, 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 EN 2002-1. 8.3 Frequency See Table 7. 8.4 Test result
36、s 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 hardness testing. The
37、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 EN 2004-1. The values obtained shall conform with the requirements of the ma
38、terial standards and the maximum variations 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 applied to the
39、 following products: The number and position of measurements and sampling are given in Table 4. Table 4 k1 MS/m per product, % k 1,5 MS/m per batch. Bar: with circular cross section having a diameter U 30 mm, with square cross section having a side U 25 mm, with rectangular cross section having a wi
40、dth U 25 mm. Section: If their shape and dimensions make such measurement possible. Product Number and position of measurement per product Amount of tested products per batch Bar with circular cross section 1 per end on cross sectionEach product Bar with square or rectangular cross section 1 per bar
41、 end on cross sectionEach product and 1 every metre along the bar25 % 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 products1 every metre along the section EN 2070-3:1989 6 BSI 11-1999 9.2 Hardness testing Each product
42、shall be hardness tested provided their shape and dimensions make such measurement possible. Testing shall be in accordance with EN 2002-7. The number and location of measurements per product shall be: length k 4,5 m: one end, length 4,5 m: both ends. The values obtained shall conform with any value
43、s 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 and, if
44、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 with Table 5, level A or B as s
45、pecified by the material standard. Table 5 Dimensions in millimetres D or a Maximum thickness of the peripheral coarse grain zone Level ALevel B (D or a) u 1,5 1,5 1004,08,0 a Use the lower value. EN 2070-3:1989 BSI 11-19997 Examination for back end defect and coarse grain zone shall be on a transve
46、rse 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 and reg
47、ular 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 coarse gra
48、in 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 EN 2004-4 and the values o
49、btained 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 conductivity in a