BS-EN-755-5-1996.pdf
BRITISH STANDARD BS EN 755-5:1996 Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 5: Rectangular bars, tolerances on dimensions and form The European Standard EN 755-5:1995 has the status of a British Standard ICS 77.120.10; 77.140.90 BS EN 755-5:1996 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 June 1996 © BSI 12-1998 The following BSI references relate to the work on this standard: Committee reference NFE/35 Draft for comment 92/41471 DC ISBN 0 580 25835 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee NFE/35, Light metals and their alloys, upon which the following bodies were represented: Aluminium Federation Aluminium Stockholders Association London Metal Exchange Magnesium Industry Council The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Association of British Welded Aluminium Tube Makers Association of Light Alloy Refiners Limited Institution of Structural Engineers Metal Packaging Manufacturers Association Amendments issued since publication Amd. No.DateComments BS EN 755-5:1996 © BSI 12-1998i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 755-53 List of referencesInside back cover BS EN 755-5:1996 ii © BSI 12-1998 National foreword This Part of BS EN 755 has been prepared by Technical Committee NFE/35 and is the English language version of EN 755-5:1995 Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 5: Rectangular bars, tolerances on dimensions and form. This Part of BS EN 755 is published with: BS EN 755, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles. BS EN 755-3, Round bars, tolerances on dimensions and form. BS EN 755-4, Square bars, tolerances on dimensions and form. BS EN 755-6, Hexagonal bars, tolerances on dimensions and form. BS EN 754, Aluminium and aluminium alloys Cold drawn rod/bar and tube. BS EN 754-3, Round bars, tolerances on dimensions and form. BS EN 754-4, Square bars, tolerances on dimensions and form. BS EN 754-5, Rectangular bars, tolerances on dimensions and form. BS EN 754-6, Hexagonal bars, tolerances on dimensions and form. As a result, the following standards are partially superseded by those listed above. The European standards should be used in preference whenever possible. BS 1474:1987, Specification for wrought aluminium and aluminium alloys for general engineering purposes Bars, extruded round tubes and sections. BS 4300, Wrought aluminium alloys for general engineering purposes (supplementary series): BS 4300-4:1973, 6463 Solid extruded bars and sections suitable for bright trim/reflector applications. BS 4300-5:1973, 2011 Free cutting bar and wire. BS 4300-12:1969, 5454 Bar, extruded round tube and sections. BS 4300-15:1973, 7020 Bar, extruded round tube and sections. BS 2898:1970, Specification for wrought aluminium and aluminium alloys for electrical purposes Bars, extruded round tube and sections. When the following European Standards are published the above British Standards will be withdrawn. BS EN 755, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles. BS EN 755-1, Technical conditions for inspection and delivery. BS EN 755-2, Mechanical properties. BS EN 754, Aluminium and aluminium alloys Cold drawn rod/bar and tube. BS EN 754-1, Technical conditions for inspection and delivery. BS EN 754-2, Mechanical properties. 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 a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 755-5 June 1995 ICS 77.140.90 Descriptors: Extruded products, rolled products, aluminium, aluminium alloys, metal bars, flat bars, dimensions, dimensional tolerances, form tolerances English version Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 5: Rectangular bars, tolerances on dimensions and form Aluminium et alliages daluminium Barres, tubes et profilés filés Partie 5: Barres rectangulaires, tolérances sur dimensions et forme Aluminium und Aluminiumlegierungen Stranggepreßte Stangen, Rohre und Profile Teil 5: Rechteckstangen, Grenzabmaße und Formtoleranzen This European Standard was approved by CEN on 1995-05-13. 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 may be obtained on application to the Central Secretariat 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1995 All rights of reproduction and communication in any form and by any means reserved in all countries to CEN and its members Ref. No. EN 755-5:1995 E EN 755-5:1995 © BSI 12-1998 2 Foreword This European Standard has been prepared by the Technical Committee CEN/TC 132, Aluminium and aluminium alloys, of which the secretariat 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 December 1995, and conflicting national standards shall be withdrawn at the latest by December 1995. Within its programme of work, Technical Committee CEN/TC 132 entrusted CEN/TC 132/WG 5, Extruded and drawn products, to prepare the following standard: EN 755-5, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 5: Rectangular bars, tolerances on dimensions and form. This standard is part of a set of nine standards. The other standards deal with: EN 755-1, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 1: Technical conditions for inspection and delivery. EN 755-2, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 2: Mechanical properties. EN 755-3, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 3: Round bars, tolerances on dimensions and form. EN 755-4, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 4: Square bars, tolerances on dimensions and form. EN 755-6, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 6: Hexagonal bars, tolerances on dimensions and form. EN 755-7, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 7: Seamless tubes, tolerances on dimensions and form. EN 755-8, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 8: Porthole tubes, tolerances on dimensions and form. EN 755-9, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 9: Profiles, tolerances on dimensions and form. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Tolerances on dimensions and form 3 2.1 Thickness and width 3 2.2 Corner radii 4 2.3 Squareness 4 2.4 Convexity concavity 4 2.5 Straightness 4 2.6 Twist 5 2.7 Length 5 2.8 Squareness of cut ends 5 3 Alloy groups 6 Figure 1 Measurement of deviation from square4 Figure 2 Measurement of deviation from flatness6 Figure 3 Measurement of deviation from straightness6 Figure 4 Measurement of twist7 Table 1 Width and thickness tolerances for alloy group I3 Table 2 Width and thickness tolerances for alloy group II3 Table 3 Maximum corner radii4 Table 4 Squareness tolerances4 Table 5 Convexity Concavity tolerances4 Table 6 Straightness tolerances5 Table 7 Twist tolerances5 Table 8 Fixed length tolerances (plus only)5 Table 9 Alloy groups7 EN 755-5:1995 © BSI 12-19983 1 Scope This Part of EN 755 specifies the tolerances on dimensions and form for aluminium and aluminium alloy extruded rectangular bars having thicknesses in the range from 2 mm up to 240 mm and widths in the range from 10 mm up to 600 mm. 2 Tolerances on dimensions and form 2.1 Thickness and width The tolerances on thickness and width are specified in Table 1 and Table 2. For the purposes 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 9. Table 1 Width and thickness tolerances for alloy group I Table 2 Width and thickness tolerances for alloy group II Dimensions in millimetres Width wThickness t tolerances for thickness ranges OverUp toTolerances2 t 66 10300,2 30500,3 50800,4 801200,6 1201800,9 1802401,2 2403501,5 3504502,0 4506002,5 Figure 1 Measurement of deviation from square EN 755-5:1995 © BSI 12-19985 For rectangular bars with thickness equal to or greater than 10 mm, the straightness tolerances are specified in Table 6. For rectangular bars with thickness less than 10 mm, the straightness tolerances shall be agreed upon between purchaser and supplier. The straightness tolerances apply to bars in all tempers except O and T × 510. If a straightness tolerance is required for either O or T × 510 temper, it shall be agreed between purchaser and supplier. Table 6 Straightness tolerances 2.6 Twist The twist measurement shall be carried out as shown in Figure 4. The twist tolerances are specified in Table 7. The twist tolerances apply to bars in all tempers except O and T × 510. If a twist tolerance is required for either O or T × 510 temper, it shall be agreed between purchaser and supplier. Table 7 Twist tolerances 2.7 Length If fixed lengths are to be supplied, this shall be stated on the order. The fixed length tolerances are specified in Table 8. Table 8 Fixed length tolerances (plus only) If no fixed or minimum length is specified in the order, rectangular extruded bars may be delivered in random lengths. The actual lengths and tolerances on random lengths shall be agreed between purchaser and supplier. 2.8 Squareness of cut ends The squareness of cut ends shall be within haft of the fixed length tolerance range (Table 8) for both fixed and random lengths, e.g. for a fixed length tolerance of mm, the squareness of cut ends shall be within 5 mm. Dimensions in millimetres Width wThickness tMaximum deviation from straightness h1 mm/m Maximum localised kink in any 300 mm portion hs Over Up to OverUp to and including 1080 108021 80120 105021 5012031,5 120180 105031,5 5018042 180350 105042 5024064 350450 1024064 4506003012064 Dimensions in millimetres Width wTwist tolerances T OverUp toPer 1 000 mm of length Over the total length 103013 30501,54 5012025 12024038 240350410 350450512 450600614 Dimensions in millimetres Width wTolerances on length OverUp toL 2 0002 000 5 000 100 100200 200450 450600 + 5 0 + 7 0 + 10 0 + 7 0 + 9 0 + 12 0 + 8 0 + 11 0 + 14 0 + 9 0 + 12 0 + 16 0 + 10 0 EN 755-5:1995 6 © BSI 12-1998 3 Alloy groups The division into group I and group II of the most commonly used general engineering alloys is specified in Table 9. Grouping of other alloys is subject to agreement between purchaser and supplier. Figure 2 Measurement of deviation from flatness Figure 3 Measurement of deviation from straightness EN 755-5:1995 © BSI 12-19987 Table 9 Alloy groups Figure 4 Measurement of twist Group IEN AW-1050A, EN AW-1070A, EN AW-1200, EN AW-1350 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-6012, EN AW-6018, EN AW-6351, EN AW-6060, EN AW-6061, EN AW-6261, EN AW-6262, EN AW-6063, EN AW-6063A, EN AW-6463, EN AW-6081, EN AW-6082 Group IIEN 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-5019a EN AW-5052, EN AW-5154A, EN AW 5454, EN AW-5754, EN AW-5083, EN AW-5086 EN AW-7003, EN AW-7005A, EN AW-7020, EN AW-7022, EN AW-7049A, EN AW-7075 a EN AW-5019 is the new designation for EN AW-5056A. 8 blank BS EN 755-5:1996 © BSI 12-1998 List of references See national foreword. 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