BS EN 755-4-2008 Aluminium and naluminium alloys — nExtruded rod bar tube nand profiles — nPart 4 Square bars tolerances on ndimensions and form《铝和铝合金 挤压的杆材 棒材、管材和型材 方棒材的尺寸和形状公差》.pdf

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1、BRITISH STANDARDBS EN 755-4:2008Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 4: Square bars, tolerances on dimensions and formICS 77.150.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53

2、g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 755-4:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2008 BSI 2008ISBN 978 0 580 55558 9National forewordThis British Standard is the UK implementation of E

3、N 755-4:2008. It supersedes BS EN 755-4:1996 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee NFE/35, Light metals and their alloys.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does

4、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 obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE

5、NORMEN 755-4March 2008ICS 77.150.10 Supersedes EN 755-4:1995 English VersionAluminium and aluminium alloys - Extruded rod/bar, tube andprofiles - Part 4: Square bars, tolerances on dimensions andformAluminium et alliages daluminium - Barres, tubes etprofils fils - Partie 4: Barres carres, tolrances

6、surdimensions et formeAluminium und Aluminiumlegierungen - StranggepressteStangen, Rohre und Profile - Teil 4: Vierkantstangen,Grenzabmae und FormtoleranzenThis European Standard was approved by CEN on 10 February 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which s

7、tipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard

8、 exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards

9、 bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.E

10、UROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 755-4:2008: EEN 755-4:2008 (

11、E) 2 Contents Page Foreword3 1 Scope 5 2 Alloy groups .5 3 Tolerances on dimensions .5 3.1 Width across flats 5 3.2 Corner radii.6 3.3 Length .6 3.4 Squareness of cut ends 7 4 Tolerances on forms .7 4.1 Straightness .7 4.2 Convexity - Concavity .8 4.3 Twist8 4.4 Squareness.9 Bibliography 11 BS EN 75

12、5-4:2008EN 755-4:2008 (E) 3 Foreword This document (EN 755-4:2008) 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 given the status of a national standard, either by publication of an ide

13、ntical 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 755-4:1995. Within its programme of work, Technical committee CEN/TC 132 entrusted CEN/TC 132/WG 5 “Extruded and drawn pr

14、oducts“ to revise EN 755-4:1995. The following technical modifications have been introduced during the revision: Clause 2: Alloys EN AW-3102, EN AW-6008, EN AW-6010A, EN AW-6014, EN AW-6023, EN AW-6360, EN AW-6262A, EN AW-6065 and EN AW-6182 are added in Group I Clause 2: Alloys EN AW-5049, EN AW-71

15、08, EN AW-7108A and EN AW-7021 are added in Group II EN 755 comprises the following parts under the general title “Aluminium and aluminium alloys Extruded rod/bar, tube and profiles“: Part 1: Technical conditions for inspection and delivery Part 2: Mechanical properties Part 3: Round bars, tolerance

16、s on dimensions and form Part 4: Square bars, tolerances on dimensions and form Part 5: Rectangular 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 dimens

17、ions and form Part 9: Profiles, tolerances on dimensions and form Attention is drawn to the possibility that some of the elements of this document 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 i

18、t is its policy that in the case when a patentee refuses to grant licenses on standardized standards products under reasonable and not discriminatory conditions then this product shall be removed from the corresponding standard. BS EN 755-4:2008EN 755-4:2008 (E) 4 According to the CEN/CENELEC Intern

19、al Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malt

20、a, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 755-4:2008EN 755-4:2008 (E) 5 1 Scope This document specifies the tolerances on dimensions and form for aluminium and aluminium alloy extruded square bars having widths acr

21、oss flats from 10 mm up to 220 mm. The temper designations used in this part are according to EN 515. 2 Alloy groups The division into group I and group II of the most commonly used general engineering alloys is specified in Table 1. Grouping of other alloys is subject to agreement between supplier

22、and purchaser. Table 1 Alloy groups Group I EN AW-1050A, EN AW-1070A, EN AW-1200, EN AW-1350 EN AW-3102, EN AW-3003, EN AW-3103 EN AW-5005, EN AW-5005A, EN AW-5051A, EN AW-5251 EN AW-6101A, EN AW-6101B, EN AW-6005, EN AW-6005A, EN AW-6106, EN AW-6008, EN AW-6010A, EN AW-6012, EN AW-6014, EN AW-6018,

23、 EN AW-6023, EN AW-6351, EN AW-6060, EN AW-6360, EN AW-6061, EN AW-6261, EN AW-6262, EN AW-6262A, EN AW-6063, EN AW-6063A, EN AW-6463, EN AW-6065, EN AW-6081, EN AW-6082, EN AW-6182 Group II EN AW-2007, EN AW-2011, EN AW-2011A, EN AW-2014, EN AW-2014A, EN AW-2017A, EN AW-2024, EN AW-2030 EN AW-5019,

24、 EN AW-5049, EN AW-5052, EN AW-5154A, EN AW-5454, EN AW-5754, EN AW-5083, EN AW-5086 EN AW-7003, EN AW-7005, EN AW-7108, EN AW-7108A, EN AW-7020, EN AW-7021, EN AW-7022, EN AW-7049A, EN AW-7075 3 Tolerances on dimensions 3.1 Width across flats The tolerances on width across flats are specified in Ta

25、ble 2. For the purpose of this standard the alloys are distributed into two groups which correspond to varying difficulty when manufacturing the products. The division into group I and group II of the most commonly used general engineering alloys is specified in Table 1. BS EN 755-4:2008EN 755-4:200

26、8 (E) 6 Table 2 Width across flats tolerances Dimensions in millimetres Width across flats S Tolerances Over Up to and including Alloy group I Alloy group II 10 18 0,22 0,30 18 25 0,25 0,35 25 40 0,30 0,40 40 50 0,35 0,45 50 65 0,40 0,50 65 80 0,45 0,70 80 100 0,55 0,90 100 120 0,65 1,0 120 150 0,80

27、 1,2 150 180 1,0 1,4 180 220 1,15 1,7 3.2 Corner radii Maximum corner radii are specified in Table 3. Table 3 Maximum corner radii Dimensions in millimetres Width across flats S Maximum corner radii Over Up to and including Alloy group I Alloy group II 10 25 1,0 1,5 25 50 1,5 2,0 50 80 2,0 3,0 80 12

28、0 2,5 3,0 120 180 2,5 4,0 180 220 3,5 5,0 3.3 Length If fixed lengths are to be supplied, this shall be stated in the order document. The fixed length tolerances are specified in Table 4. BS EN 755-4:2008EN 755-4:2008 (E) 7 Table 4 Fixed length tolerances Dimensions in millimetres Width across flats

29、 S Tolerances on length Over Up to and including L 2000 2000 5000 10 100 05+07+010+100 200 07+09+012+200 220 08+011+014+If no fixed or minimum length is specified in the order document, square extruded bars may be delivered in random lengths. The actual lengths and tolerances on random lengths shall

30、 be agreed between supplier and purchaser. 3.4 Squareness of cut ends The squareness of cut ends shall be within half of the fixed-length tolerance range (Table 4) 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). 4 To

31、lerances on forms 4.1 Straightness Deviations from straightness, hsand ht,shall be measured as shown in Figure 1 with the square bar placed on a horizontal base plate so that its mass decreases the deviation. The straightness tolerances are specified in Table 5 (The straightness tolerance htapplies

32、to the whole length, e.g. for a length of 6 m the maximum deviation from straightness htis the value given in the table multiplied by 6 m). The straightness tolerances apply to square bars in all tempers except O and Tx510. lf a straightness tolerance is required for either O or Tx510 temper, it sha

33、ll be agreed between supplier and purchaser. BS EN 755-4:2008EN 755-4:2008 (E) 8 Key 1 base plate 2 straight edge Figure 1 Measurement of deviation from straightness Table 5 Straightness tolerances Dimensions in millimetres Width across flats S Over Up to and including Maximum deviation from straigh

34、tness per metre length ht/length mm/m Maximum localised kink in any 300 mm portion hs 10 80 2 0,8 80 120 2 1,0 120 220 3 1,5 4.2 Convexity - Concavity The convexity - concavity for square bars shall be included within the width across flats tolerances as given in Table 2. 4.3 Twist The twist measure

35、ment shall be carried out as shown in Figure 2. The twist tolerances are specified in Table 6. The twist tolerances apply to square bars in all tempers except O and Tx510. If a twist tolerance is required for either O or Tx510 temper, it shall be agreed between supplier and purchaser. BS EN 755-4:20

36、08EN 755-4:2008 (E) 9 Key 1 base plate Figure 2 Measurement of twist Table 6 Twist tolerances Dimensions in millimetres Width across flats S Twist tolerances T Over Up to and including Per 1 000 mm of length Over the total length 10 30 1 3 30 50 1,5 4 50 120 2 5 120 220 3 6 4.4 Squareness The deviat

37、ion from square shall be measured as shown in Figure 3. Squareness tolerances are specified in Table 7. BS EN 755-4:2008EN 755-4:2008 (E) 10 Figure 3 Measurement of deviation from square Table 7 Squareness tolerances Dimensions in millimetres Width across flats S Over Up to and including Maximum dev

38、iation from square Z 10 100 0,01 x width 100 180 1,0 180 220 1,5 BS EN 755-4:2008EN 755-4:2008 (E) 11 Bibliography 1 EN 515, Aluminium and aluminium alloys Wrought products Temper designations BS EN 755-4:2008BS EN 755-4:2008BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI i

39、s the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of British Standards should make sure

40、 that they possess the latest amendments or editions.It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsibl

41、e, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards.Buying standardsOrders for all BSI,

42、international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001. Email: ordersbsi-. Standards are also available from the BSI website at http:/www.bsi-.In response to orders for international standards, it is BSI policy to

43、 supply the BSI implementation of those that have been published as British Standards, unless otherwise requested.Information on standardsBSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Variou

44、s BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: infobsi-.Subscribing members of BSI are kept up to date with standards developments and receive sub

45、stantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 7001. Email: membershipbsi-.Information regarding online access to British Standards via British Standards Online can be fou

46、nd at http:/www.bsi- information about BSI is available on the BSI website at http:/www.bsi-.CopyrightCopyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs

47、 and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI.This does not preclude the free use, in the course of implementing the standard, of n

48、ecessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained.Details and advice can be obtained from the Copyright & Licensing Manager. Tel: +44 (0)20 8996 7070. Fax: +44 (0)20 8996 7553. Email: copyrightbsi-.

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