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1、BRITISH STANDARD BS EN 754-6:2008 Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 6: Hexagonal bars, tolerances on dimensions and form ICS 77.150.10 ? BS EN 754-6:2008 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2
2、008 BSI 2008 ISBN 978 0 580 55599 2 National foreword This British Standard is the UK implementation of EN 754-6:2008. It supersedes BS EN 754-6:1996 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee NFE/35, Light metals and their alloys. A list of orga
3、nizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obliga
4、tions. Amendments/corrigenda issued since publication DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 754-6 March 2008 ICS 77.150.10Supersedes EN 754-6:1995 English Version Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 6: Hexagonal bars, tolerances on dimensio
5、ns and form Aluminium et alliages daluminium - Barres et tubes tirs - Partie 6: Barres hexagonales, tolrances sur dimensions et forme Aluminium und Aluminiumlegierungen - Gezogene Stangen und Rohre - Teil 6: Sechskantstangen, Grenzabmae und Formtoleranzen This European Standard was approved by CEN o
6、n 10 February 2008. CEN members are bound to comply with the CEN/CENELEC 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
7、may be obtained on application to the CEN Management Centre 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 the
8、 CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Nether
9、lands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CENAll rights of exploitation
10、in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 754-6:2008: E EN 754-6:2008 (E) 2 Contents Page Foreword3 1 Scope 4 2 Tolerances on dimensions .4 2.1 Width across flats4 2.2 Corner radii.4 2.3 Length.5 2.4 Squareness of cut ends 5 3 Tolerances on form5 3.1 Strai
11、ghtness.5 3.2 Convexity - Concavity .6 3.3 Twist6 Bibliography8 BS EN 754-6:2008 EN 754-6:2008 (E) 3 Foreword This document (EN 754-6:2008) has been prepared by Technical Committee CEN/TC 132 “Aluminium and aluminium alloys”, the secretariat of which is held by AFNOR. This European Standard shall be
12、 given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2008, and conflicting national standards shall be withdrawn at the latest by September 2008. This document supersedes EN 754-6:1995. Within its programme of work, Techni
13、cal Committee CEN/TC 132 entrusted CEN/TC 132/WG 5 “Extruded and drawn products“ to revise EN 754-6:1995 The following technical modifications have been introduced during the revision: Only editorial changes to bring this part in line with the other parts of EN 754 EN 754 comprises the following par
14、ts under the general title “Aluminium and aluminium alloys Cold drawn rod/bar and tube “: Part 1: Technical conditions for inspection and delivery Part 2: Mechanical properties Part 3: Round bars, tolerances on dimensions and form Part 4: Square bars, tolerances on dimensions and form Part 5: Rectan
15、gular bars, tolerances on dimensions and form Part 6: Hexagonal bars, tolerances on dimensions and form Part 7: Seamless tubes, tolerances on dimensions and form Part 8: Porthole tubes, tolerances on dimensions and form Attention is drawn to the possibility that some of the elements of this document
16、 may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. CEN/TC 132 affirms it is its policy that in the case when a patentee refuses to grant licenses on standardized standards products under reasonable and not discriminat
17、ory conditions then this product shall be removed from the corresponding standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Den
18、mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 754-6:2008 EN 754-6:2008 (E) 4 1 Scope This document s
19、pecifies the tolerances on dimensions and form for aluminium and aluminium alloy cold drawn hexagonal bars having widths across flats in the range from 3 mm up to and including 80 mm. The temper designations used in this part are according to EN 515. 2 Tolerances on dimensions 2.1 Width across flats
20、 The tolerances on width across flats are specified in Table 1. Table 1 Tolerances on width across flats Dimensions in millimetres Width across flats S Over Up to and including Tolerances 3 6 0 - 0,08 6 10 0 - 0,09 10 18 0 - 0,11 18 30 0 - 0,13 30 50 0 - 0,16 50 65 0 - 0,19 65 80 0 - 0,30 2.2 Corner
21、 radii Maximum corner radii are specified in Table 2. BS EN 754-6:2008 EN 754-6:2008 (E) 5 Table 2 Maximum corner radii Dimensions in millimetres Width across flats S Over Up to and including Maximum corner radii 3 8 0,2 8 30 0,4 30 60 0,6 60 80 0,8 2.3 Length If fixed lengths are to be supplied, th
22、is shall be stated in the order document. The fixed length tolerances are specified in Table 3. Table 3 Fixed length tolerances Dimensions in millimetres Width across flats S Tolerances on length From Up to and including L 2 000 2 000 5 000 3 80 0 5+ 0 7+ 0 10+ If no fixed or minimum length is speci
23、fied in the order document, hexagonal drawn bars may be delivered in random lengths. The actual lengths and tolerances on random lengths shall be agreed between supplier and purchaser. 2.4 Squareness of cut ends The squareness of cut ends shall be within half of the fixed-length tolerance range (Tab
24、le 3) for both fixed and random lengths, (e.g. for a fixed length tolerance of 10 0 + mm the squareness of cut ends shall be within 5 mm). 3 Tolerances on form 3.1 Straightness Deviations from straightness, hs and ht, shall be measured as shown in Figure 1 with the hexagonal bar placed on a horizont
25、al base plate so that its mass decreases the deviation. The straightness tolerances are specified in Table 4. (The straightness tolerance ht applies to the whole length, e.g. for a length of 6 m the maximum deviation from straightness ht is the value given in the table multiplied by 6 m). For hexago
26、nal bars with width across flats less than 10 mm, the straightness tolerances shall be agreed upon between supplier and purchaser. BS EN 754-6:2008 EN 754-6:2008 (E) 6 The straightness tolerances apply to hexagonal bars with width across flats 10 mm and greater in all tempers except O and Tx51. If a
27、 straightness tolerance is required for either O or Tx51 temper, it shall be agreed between supplier and purchaser. Key 1 base plate 2 straight edge Figure 1 Measurement of deviation from straightness Table 4 Straightness tolerances Dimensions in millimetres With across flats S From Up to and includ
28、ing Maximum deviation from straightness per metre length ht/length mm/m Maximum localized kink in any 300 mm portion hs 10 80 2 0,6 3.2 Convexity - Concavity The convexity - concavity tolerances for hexagonal bar shall be included within the width across flats tolerances as given in Table 1. 3.3 Twi
29、st The twist measurement shall be carried out as shown in Figure 2. The twist tolerances are specified in Table 5. For bars with width across flats less than 10 mm, the twist tolerances shall be agreed between supplier and purchaser. The twist tolerances apply to bars with width across flats 10 mm a
30、nd greater in all tempers except O and Tx51. If a twist tolerance is required for either O or Tx51 temper, it shall be agreed between supplier and purchaser. BS EN 754-6:2008 EN 754-6:2008 (E) 7 Key 1 base plate Figure 2 Measurement of twist Table 5 Twist tolerances Dimensions in millimetres Width a
31、cross flats S Twist tolerances T Over Up to and including per 1 000 mm of length over the total length 10 30 1 2 30 80 1,5 2,5 BS EN 754-6:2008 EN 754-6:2008 (E) 8 Bibliography 1 EN 515, Aluminium and aluminium alloys Wrought products Temper designations BS EN 754-6:2008 blank BS EN 754-6:2008 BSI 3
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