1、BRITISH STANDARDBS EN 755-3:2008Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 3: Round bars, tolerances on dimensions and formICS 77.150.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g
2、48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 755-3:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2008 BSI 2008ISBN 978 0 580 55557 2National forewordThis British Standard is the UK implementation of EN
3、 755-3:2008. It supersedes BS EN 755-3:1996 which is withdrawn.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 n
4、ot 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 N
5、ORMEN 755-3March 2008ICS 77.150.10 Supersedes EN 755-3:1995 English VersionAluminium and aluminium alloys - Extruded rod/bar, tube andprofiles - Part 3: Round bars, tolerances on dimensions andformAluminium et alliages daluminium - Barres, tubes etprofils fils - Partie 3: Barres rondes, tolrances su
6、rdimensions et formeAluminium und Aluminiumlegierungen - StranggepressteStangen, Rohre und Profile - Teil 3: Rundstangen,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 stipula
7、te 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 exist
8、s 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 bodie
9、s 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.EUROPEA
10、N 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 755-3:2008: EEN 755-3:2008 (E) 2 C
11、ontents Page Foreword3 1 Scope 5 2 Alloy groups .5 3 Tolerances on dimensions .5 3.1 Diameter5 3.2 Length .6 3.3 Squareness of cut ends 7 4 Tolerances on form7 4.1 Ovality .7 4.2 Straightness .7 Bibliography 9 BS EN 755-3:2008EN 755-3:2008 (E) 3 Foreword This document (EN 755-3:2008) has been prepar
12、ed 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, and conflicting na
13、tional standards shall be withdrawn at the latest by September 2008. This document supersedes EN 755-3:1995. Within its programme of work, Technical committee CEN/TC 132 entrusted CEN/TC 132/WG 5 “Extruded and drawn products“ to revise EN 755-3:1995. The following technical modifications have been i
14、ntroduced during the revision: Clause 2: Alloy 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: Alloy EN AW-5049, EN AW-7108, EN AW-7108A and EN AW-7021 are added in Group II EN 755 comprises the following
15、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, tolerances on dimensions and form Part 4: Square bars, tolerances on dimensions and form Part
16、 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 dimensions and form Part 9: Profiles, tolerances on dimensions and form Attention is drawn
17、 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 it is its policy that in the case when a patentee refuses to grant licenses on standa
18、rdized standards products under reasonable and not discriminatory conditions then this product shall be removed from the corresponding standard. BS EN 755-3:2008EN 755-3:2008 (E) 4 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are
19、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, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden
20、, Switzerland and the United Kingdom. BS EN 755-3:2008EN 755-3:2008 (E) 5 1 Scope This document specifies the tolerances on dimensions and form for aluminium and aluminium alloy extruded round bars having diameters in the range from 8 mm up to 320 mm. The temper designations used in this part are ac
21、cording 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 and purchaser. Table 1 Alloy group Group I EN AW-1050A, EN AW-1070A, EN AW-1200, EN
22、 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, EN AW-6023, EN AW-6351, EN AW-6060, EN AW-6360, EN AW-6061, EN AW-6261, EN AW-6262,
23、 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, EN AW-5049, EN AW-5052, EN AW-5154A, EN AW-5454, EN AW-5754, EN AW-5083, EN AW-5086
24、 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 Diameter The tolerances on diameter are specified in Table 2: For the purpose of this document the alloys are distributed into two groups which correspond to v
25、arying 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 755-3:2008EN 755-3:2008 (E) 6 Table 2 Diameter tolerances Dimensions in millimetres Diameter D Tolerances Over Up to and inclu
26、ding Alloy group I Alloy group II 8 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 1,2 150 180 1,0 1,4 180 220 1,15 1,7 220 270 1,3 2,0 270 320 1,6 2,5 3.2 Length If fixed lengths are to be supplied, this sh
27、all be stated in the order document. The fixed length tolerances are specified in Table 3. Table 3 Fixed length tolerances Dimensions in millimetres Diameter D Tolerances on length Over Up to and including L 2000 2000 5000 - 100 05+07+010+100 200 07+09+012+200 320 08+011+- If no fixed or minimum len
28、gth is specified in the order document, round extruded bars may be delivered in random lengths. The actual lengths and tolerances on random-lengths shall be agreed between supplier and purchaser. BS EN 755-3:2008EN 755-3:2008 (E) 7 3.3 Squareness of cut ends The squareness of cut ends shall be withi
29、n half of the fixed length tolerance range (Table 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). 4 Tolerances on form 4.1 Ovality Ovality is the difference between the maximum and minimum diameters measured in on
30、e cross-section. The maximum permissible ovality is 50 % of the tolerance range specified in Table 2 (e.g. for a diameter tolerance of 0,22 mm, the maximum permissible ovality is 0,22 mm). 4.2 Straightness Deviations from straightness, hsand ht,shall be measured as shown in Figure 1 with the round b
31、ar placed.on a horizontal base plate so that its mass decreases the deviation. The straightness tolerances are specified in Table 4 (The straightness 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
32、 by 6 m). The straightness tolerances apply to round bars in all tempers except O and T x 510. If a straightness tolerance is required for either O or Tx510 temper, it shall be agreed between supplier and purchaser. Key 1 base plate 2 straight edge Figure 1 Measurement of deviation from straightness
33、 BS EN 755-3:2008EN 755-3:2008 (E) 8 Table 4 Straightness tolerances Dimensions in millimetres Diameter D Over Up to and including Maximum deviation from straightness per metre length ht/length mm/m Maximum localised kink in any 300 mm portion hs 8 80 2 0,6 80 120 2 1,0 120 200 3 1,5 200 320 6 3,0 B
34、S EN 755-3:2008EN 755-3:2008 (E) 9 Bibliography 1 EN 515, Aluminium and aluminium alloys Wrought products Temper designations BS EN 755-3:2008BS EN 755-3:2008BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British S
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