1、BRITISH STANDARDBS EN 754-4:2008Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 4: Square bars, tolerances on dimensions and formICS 77.150.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g5
2、5g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 754-4:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2008 BSI 2008ISBN 978 0 580 55597 8National forewordThis British Standard is the UK implementation of EN 754-4:
3、2008. It supersedes BS EN 754-4:1996 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee NFE/35, Light metals and their alloys.A list of organizations represented on this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 not purpo
4、rt 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 NORMEN 75
5、4-4March 2008ICS 77.150.10 Supersedes EN 754-4:1995 English VersionAluminium and aluminium alloys - Cold drawn rod/bar and tube -Part 4: Square bars, tolerances on dimensions and formAluminium et alliages daluminium - Barres et tubes tirs -Partie 4: Barres carres, tolrances sur dimensions etformeAlu
6、minium und Aluminiumlegierungen - Gezogene Stangenund Rohre - Teil 4: Vierkantstangen, Grenzabmae undFormtoleranzenThis European Standard was approved by CEN on 10 February 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this E
7、uropeanStandard 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 exists in three official versions (Engli
8、sh, 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 bodies of Austria, Belgium, Bulgaria, Cy
9、prus, 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.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMI
10、T 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 754-4:2008: EEN 754-4:2008 (E) 2 Contents Page Foreword3 1 Scope 4 2
11、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 Tolerance on form5 3.1 Straightness .5 3.2 Convexity - Concavity .6 3.3 Twist6 3.4 Squareness.7 Bibliography 9 BS EN 754-4:2008EN 754-4:2008 (E) 3 Foreword This document (EN 754-4:2008
12、) 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 identical text or by endorsement, at the latest by September 2008, a
13、nd conflicting national standards shall be withdrawn at the latest by September 2008. This document supersedes EN 754-4:1995. Within its programme of work, Technical committee CEN/TC 132 entrusted CEN/TC 132/WG 5 “Extruded and drawn products“ to revise EN 754-4:1995. The following technical modifica
14、tions 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 parts under the general title “Aluminium and aluminium alloys Cold drawn rod/bar and tube“: Part 1: Technical conditions for inspection and
15、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: Rectangular bars, tolerances on dimensions and form Part 6: Hexagonal bars, tolerances on dimensions and form Part 7: Seamless tubes, tolerances
16、 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 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/
17、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 discriminatory conditions then this product shall be removed from the corresponding standard. According to the CEN/CENELEC Internal Regulations, the
18、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, Malta, Netherlands, Norw
19、ay, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 754-4:2008EN 754-4:2008 (E) 4 1 Scope This document specifies the tolerances on dimensions and form for aluminium and aluminium alloy cold drawn square bars having widths across flats from 3 m
20、m up to and including 100 mm. The temper designations used in this part are according to EN 515. 2 Tolerances on dimensions 2.1 Width across flats The tolerances on width across flats are specified in Table 1. Table 1 Width across flats tolerances Dimensions in millimetres Width across flats S Over
21、Up to and including Tolerances 3 6 08,006 10 09,0010 18 11,0018 30 13,0030 50 16,0050 65 19,0065 80 30,0080 100 35,002.2 Corner radii Maximum corner radii are specified in Table 2. BS EN 754-4:2008EN 754-4:2008 (E) 5 Table 2 Maximum corner radii Dimensions in millimetres Width across flats S Over Up
22、 to and including Maximum corner radii 3 8 0,4 8 30 0,8 30 60 1,0 60 80 1,5 80 100 2,0 2.3 Length If fixed lengths are to be supplied, this shall be stated in the order document. The fixed length tolerances are specified in Table 3. Table 3 Fixed length tolerances Dimensions in millimetres Width acr
23、oss flats S Tolerances on length From Up to and including L 2 000 2 000 5 000 3 100 05+07+010+If no fixed or minimum length is specified in the order, square drawn bars may be delivered in random lengths. The actual lengths and tolerances on random lengths shall be agreed between supplier and purcha
24、ser. 2.4 Squareness of cut ends The squareness of cut ends shall be within half of the fixed-length tolerance range (Table 3) for both fixed and random lengths, (e.g. for a fixed length tolerance of10 0 +mm the squareness of cut ends shall be within 5 mm). 3 Tolerance on form 3.1 Straightness Deviat
25、ions 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. For square bars with width across flats equal or greater than 10 mm, the straightness tolerances are specified in Table 4. (The stra
26、ightness tolerance htapplies 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). For square bars with width across flats less than 10 mm, the straightness tolerances shall be agreed upon between supplier and purc
27、haser. BS EN 754-4:2008EN 754-4:2008 (E) 6 The straightness tolerances apply to square bars in all tempers except O and Tx51. If a 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
28、of deviation from straightness Table 4 Straightness tolerances Dimensions in millimetres Width across flats S From Up to and including Maximum deviation from straightness per metre length ht/length mm/m Maximum localized kink in any 300 mm portion hs10 100 2 0,6 3.2 Convexity - Concavity The convexi
29、ty - concavity for square bars shall be included within the width across flats tolerances as given in Table 1. 3.3 Twist The twist measurement shall be carried out as shown in Figure 2. The twist tolerances are specified in Table 5. For square bars with width across flats less than 10 mm, the twist
30、tolerances shall be agreed between supplier and purchaser. The twist tolerances apply to bars 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 754-4:2008EN 754-4:2008 (E) 7 Key 1 base plate Figure
31、 2 Measurement of twist Table 5 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 1,0 3,0 30 60 1,5 3,5 60 100 2,0 4,0 3.4 Squareness The deviation from square shall be measured as shown in F
32、igure 3. Squareness tolerances are specified in Table 6. BS EN 754-4:2008EN 754-4:2008 (E) 8 Figure 3 Measurement of deviation from square Table 6 Squareness tolerances Dimensions in millimetres Width across flats S From Up to and including Maximum deviation from square Z 3 100 0,005 x width BS EN 7
33、54-4:2008EN 754-4:2008 (E) 9 Bibliography 1 EN 515, Aluminium and aluminium alloys Wrought products Temper designations BS EN 754-4:2008BS EN 754-4:2008BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standar
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