1、BRITISH STANDARD AEROSPACE SERIES Hexagonal bars, drawn, o 4 o o i in aluminium and aluminium alloys Tolerance class h 11 Width across flats 7rnrn1 as 50rnrn Dimensions The European Standard EN 2046:2001 has the status of a British Standard ICs 49.025.20; 49.035 BS EN 2046:2001 NO COPYING WITHOUT BS
2、I PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 2046:2001 Amd. No. National foreword Date Comments This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy C
3、ommittee on 24 December 2001 This British Standard is the official English language version ofEN 2046:200 1. The UKparticipation in its preparation was entrusted to Technical Committee ACE/61, Inspection and testing requirements for aerospace metallic materials, which has the responsibility to: - -
4、aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations repre
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7、t of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. O
8、BSI 24 December 2001 ISBN O 580 37990 6 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2046 December 2001 ICs 49.025.20 English version Aerospace series - Hexagonal bars, drawn in aluminium and aluminium alloys - Tolerance class h 11 - Width across flats 7 mm I a I50 mm - Dimensions Srie arosp
9、atiale - Barres hexagonales, tires en aluminium et alliages daluminium - Classe de tolrance h 11 - Surplats 7 mm 6 O00 Table 2 Tolerances +6 0 + 10 0 Dimensions in millimetres I Width across flats I Tolerance class I Width across flats 7a 8 8a 40 40a 50 Corner radii r 0,2 0,4 0,6 5.1.2 Length See ta
10、ble 3, only applicable to bars supplied in fixed lengths. Table 3 5.1.3 Corner rad i i See table 4. Table 4 5.2 Geometric tolerances 5.2.1 Straightness 5.2.1.1 See EN 3848. Method of measurement and symbols 5 EN 2046:2001 (E) Width across flats 7a50 5.2.1.2 Tolerances See table 5. Straightness devia
11、tion: V, per metre Y, on any length X2 a 2 0,6 Table 5 Width across flats 7a30 30 a 50 Dimensions in millimetres Twist v: per metre 1,5 3 2 4 on total length a 5.2.2 Twist 5.2.2.1 See EN 3848. Method of measurement and symbol 5.2.2.2 Tolerances See table 6. Table 6 5.2.3 Surface flatness 5.2.3.1 Met
12、hod of measurement See EN 3848. 5.2.3.2 Tolerances The surface flatness tolerance shall be included in the width across flats tolerances. 6 BS EN 2046:2001 BSI 389 Chiswick High Road Lon don w4 4AL BSI is the independent national body responsible for preparing British Standards. It presents the UK v
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