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1、BRITISH STANDARD BS EN 754-4:1996 Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 4: Square bars, tolerances on dimensions and form The European Standard EN 754-4:1995 has the status of a British Standard ICS 77.120.10; 77.140.90 BS EN 754-4:1996 This British Standard, having been pr
2、epared 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 92/47295 DC ISBN 0 580
3、 25727 4 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 Exchan
4、ge Magnesium Industry Council Ministry of Defence 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 Pa
5、ckaging Manufacturers Association Amendments issued since publication Amd. No.DateComments BS EN 754-4:1996 BSI 12-1998i Contents Page Committees responsibleInside front cover National forewordii Text of EN 754-43 BS EN 754-4:1996 ii BSI 12-1998 National foreword This Part of BS EN 754 has been prep
6、ared by Technical Committee NFE/35 and is the English language version of EN 754-4:1995 Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 4: Square bars, tolerances on dimensions and form, published by the European Committee for Standardization (CEN). This Part of BS EN 754 is publishe
7、d with: 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 754-5, Rectangular bars, tolerances on dimensions and form. BS EN 754-6, Hexagonal bars, tolerances on dimensions and form. BS EN 755, Aluminium and alumin
8、ium 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 755-5, Rectangular bars, tolerances on dimensions and form. BS EN 755-6, Hexagonal bars, tolerances on dimensions and form. A
9、s a result, the following standards are partially superseded by those listed above. European Standards should be used in preference whenever possible. BS 1471:1972, Specification for wrought aluminium and aluminium alloys for general engineering purposes Drawn tube. BS 1474:1987, Specification for w
10、rought 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 applicat
11、ions. BS 4300-5, 1973, 2011 Free cutting bar and wire. BS 4300-10, 1969, 5454 Drawn tube. 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 pu
12、rposes Bars, extruded round tube and sections. When the following European Standards are published the above British Standards will be withdrawn. 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, Mechani
13、cal properties. 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 754-4:1996 BSI 12-1998 iii A British Standard does not purport to include all the necessary provis
14、ions 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 to iv, the EN title page,
15、 pages 2 to 5 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. ? iv blank ? EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 754-4 November 1995 ICS 77.120.10;
16、77.140.90 Descriptors: Drawn products, rolled products, aluminium, aluminium alloys, metal bars, square bars, dimensions, dimensional tolerances, form tolerances English version Aluminium and aluminium alloys Cold drown rod/bar and tube Part 4: Square bars, tolerances on dimensions and form Aluminiu
17、m et alliages d aluminium Barres et tubes tirs Partie 4: Barres carres, tolrances sur dimensions et forme Aluminium and Aluminiumlegierungen Gezogene Stangen und Rohre Teil 4: Vierkantstangen, Grenzabmae und Formtoleranzen This European Standard was approved by CEN on 1995-09-15. CEN members are bou
18、nd 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 C
19、entral 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
20、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 Comit
21、Europen de Normalisation Europisches Komitee fr 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 membersRef. No. EN 754-4:1995 E ? EN 754-4:1995 BSI 12-1998 2 Forew
22、ord This European. Standard has been drawn up by CEN/TC 132, Aluminium and aluminium alloys, whose Secretariat is held by the Association Franaise de Normalisation (AFNOR). Within its programme of work, Technical Committee CEN/TC 132 entrusted CEN/TC 132/WG 5, Extruded and drawn products, to prepare
23、 the following standard: EN 754-4, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 4: Square bars, tolerances on dimensions and form. This standard is part of a set of eight standards. The other standards deal with: EN 754-1, Aluminium and aluminium alloys Cold drawn rod/bar and tube
24、 Part 1: Technical conditions for inspection and delivery. EN 754-2, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 2: Mechanical properties. EN 754-3, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 3: Round bars, tolerances on dimensions and form. EN 754-5, Alumini
25、um and aluminium alloys Cold drawn rod/bar and tube Part 5: Rectangular bars, tolerances on dimensions and form. EN 754-6, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 6: Hexagonal bars, tolerances on dimensions and form. EN 754-7, Aluminium and aluminium alloys Cold drawn rod/bar
26、 and tube Part 7: Seamless tubes, tolerances on dimensions and form. EN 754-8, Aluminium and aluminium alloys Cold drawn rod/bar and tube Part 8: Porthole tubes, tolerances on dimensions and form. CEN/TC 132 met on 11 and 12 May 1993 in Paris and agreed on the text to be submitted to CEN member for
27、formal vote. 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 May 1996, and conflicting national standards shall be withdrawn at the latest by May 1996. The following countries were represented at
28、that meeting: Belgium, Denmark, France, Germany, Italy, Netherlands, Norway, Sweden, Switzerland, United Kingdom. According to the common CEN/CENELEC Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ir
29、eland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Tolerances on dimensions and form3 2.1Width across flats3 2.2Corner radii3 2.3Squareness3 2.4Convexity concavity3 2.5Straightness3 2.6Twist3 2.7Length5 2.8Squa
30、reness of cut ends5 Figure 1 Measurement of deviation from square4 Figure 2 Measurement of deviation from straightness4 Figure 3 Measurement of twist4 Table 1 Width across flats tolerances3 Table 2 Maximum corner radii3 Table 3 Squareness tolerances3 Table 4 Straightness tolerances3 Table 5 Twist to
31、lerances5 Table 6 Fixed length tolerances5 ? EN 754-4:1995 BSI 12-19983 1 Scope This Part of EN 754 specifies the tolerances on dimensions and form for aluminium and aluminium alloy cold drawn square bars having widths across flats from 3 mm up to 100 mm. 2 Tolerances on dimensions and form 2.1 Widt
32、h across flats The tolerances on width across flats are specified in Table 1. Table 1 Width across flats tolerances 2.2 Corner radii Maximum corner radii are specified in Table 2. Table 2 Maximum corner radii 2.3 Squareness The deviation from square shall be measured as shown in Figure 1. Squareness
33、 tolerances are specified in Table 3. Table 3 Squareness tolerances 2.4 Convexity concavity The convexity concavity for square bars shall be included within the width across flats tolerances. 2.5 Straightness Deviations from straightness, hs and ht, shall be measured as shown in Figure 2 with the ba
34、r placed on a horizontal baseplate 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. For square bars with width across flats less than 10 mm, the straightness tolerances shall be agreed
35、 upon between purchaser and supplier. The straightness tolerances apply to bars in all tempers except O and T 51. If a straightness tolerance is required for either O or T 51 temper, it shall be agreed between purchaser and supplier. Table 4 Straightness tolerances 2.6 Twist The twist measurement sh
36、all be carried out as shown in Figure 3. The twist tolerances are specified in Table 5. For square bars with width across flats less than 10 mm, the twist tolerances shall be agreed between purchaser and supplier. The twist tolerances apply to bars in all tempers except O and T 51. If a twist tolera
37、nce is required for either O or T 51 temper, it shall be agreed between purchaser and supplier. Dimensions in millimetres Width across flats S FromUp toTolerances 3a6 610 1018 1830 3050 5065 6580 80100 aExcept width across flats 3 mm which may be used. Dimensions in millimetres Width across flats S
38、FromUp toMaximum corner radii 3a80,4 8300,8 30601,0 60801,5 801002,0 aExcept width across flats 3 mm which may be used. 0 0,08 0 0,09 0 0,11 0 0,13 0 0,16 0 0,19 0 0,30 0 0,35 Dimensions in millimetres Width across flats SMaximum deviation from square z FromUp to and including 31000,005 width Dimens
39、ions in millimetres Width across flats S Maximum deviation from straightness htmm/m Maximum localized kind in any 300 mm portion hs FromUp to and including 1010020,6 ? EN 754-4:1995 4 BSI 12-1998 Figure 1 Measurement of deviation from square Figure 2 Measurement of deviation from straightness Figure
40、 3 Measurement of twist EN 754-4:1995 BSI 12-19985 Table 5 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 6. Table 6 Fixed length tolerances If no fixed or minimum length is specified in the order
41、, square drawn 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 half of the fixed length tolerance range (Table 6) for both fixed and rand
42、om lengths, e.g. for a fixed length tolerance of, the squareness of cut ends shall be within 5 mm. Dimensions in millimetres Width across flats STwist tolerances T FromUp to and including Per 1 000 mm of length Over the total length 10a301,03,0 30601,53,5 601002,04,0 aExcept width across flats 10 mm
43、 which may be used. Dimensions in millimetres Width across flats STolerances on length OverUp to and including L 2 000 2 0002 0002 000 5 0005 000 3100 5+ 0 7+ 0 10+ 0 10+ 0 mm BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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