1、BRITISH STANDARD AEROSPACE SERIES Square bars, drawn, in aluminium and aluminium alloys Tolerance class h 11 Thickne s s oimensions The European Standard EN 2045:2001 has the status of a British Standard ICs 49.025.20; 49.035 BS EN 2045:2001 Wk present to the responsible European committee any enqui
2、ries 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 represented on this committee can be obtained on request to its secretary. Cr oss-r e fer enc e s
3、The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue.
4、A British Standard does not purport to include all the 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
5、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 BSI 24 December 2001 ISBN O 580 37991 4 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN
6、2045 December 2001 ICs 49.025.20 English version Aerospace series - Square bars, drawn in aluminuim and aluminium alloys - Tolerance class h 11 - Thickness 6 mm I a I 50 mm - Dimensions Srie arospatiale - Barres carres, tires en aluminium et alliages daluminium - Classe de tolrance h 11 - Epaisseurs
7、 6 mm 6 O00 5.1.3 Corner radii See table 4. + 10 O Table 4 Thickness 6a10 10 a 30 30a50 Corner radii r 0,5 0,8 l,o 5.2 Geometric tolerances 5.2.1 Straightness 5.2.1.1 See EN 3848. Method of measurement and symbols Thickness 6a50 5.2.1.2 Tolerances See table 5. Straightness deviation: Y, per metre Y,
8、 on any length X2 a 2 0,6 Table 5 5.2.2 Squareness 5.2.2.1 See EN 3848. Method of measurement and symbol 5 EN 2045:2001 (E) Thickness 6a50 5.2.2.2 Tolerances See table 6. Squareness deviation z 0,005 x a Table 6 Thickness 6a30 30a50 Twist v: per metre on total length 1,5 3 2 4 5.2.3 Twist 5.2.3.1 Se
9、e EN 3848. Method of measurement and symbol 5.2.3.2 Tolerances See table 7. Table 7 5.2.4 Surface flatness 5.2.4.1 Method of measurement See EN 3848. 5.2.4.2 Tolerances The surface flatness tolerance shall be included in the thickness tolerances. 6 BS EN 2045:2001 BSI 389 Chiswick High Road Lon don
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