1、October 2016 English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 77.150.10!%nN“2577543www.din.deD
2、IN EN 755-7Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 7: Seamless tubes, tolerances on dimensions and form;English version EN 7557:2016,English translation of DIN EN 755-7:2016-10Aluminium und Aluminiumlegierungen Stranggepresste Stangen, Rohre und Profile Teil 7: Nahtlo
3、se Rohre, Grenzabmae und Formtoleranzen;Englische Fassung EN 7557:2016,Englische bersetzung von DIN EN 755-7:2016-10Aluminium et alliages daluminium Barres, tubes et profils fils Partie 7: Tubes fils sur aiguille, tolrances sur dimensions et forme;Version anglaise EN 7557:2016,Traduction anglaise de
4、 DIN EN 755-7:2016-10SupersedesDIN EN 7557:200907www.beuth.deDocument comprises 19 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.09.16 DIN EN 755-7:2016-10 2 A comma is used as the decimal marker. National foreword This docum
5、ent (EN 755-7:2016) has been prepared by Technical Committee CEN/TC 132 “Aluminium and aluminium alloys” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was DIN-Normenausschuss Nichteisenmetalle (DIN Standards Committee Nonferrous Metals), Working Committee NA 0
6、66-01-04 AA Strangpresserzeugnisse. Amendments This standard differs from DIN EN 755-7:2009-07 as follows: a) a new Clause 2 “Normative references” has been included and the numbering of the paragraphs following has been updated accordingly; b) in Subclause 4.2 “Diameter Round tube”, a correction ha
7、s been made and paragraphs 2 and 4 have been added. Previous editions DIN 9107: 1944-03, 1959-08, 1969-08, 1987-02 DIN EN 755-7: 1998-10, 2008-06, 2009-07 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 755-7 June 2016 ICS 77.150.10 Supersedes EN 755-7:2008English Version Aluminium and aluminiu
8、m alloys - Extruded rod/bar, tube and profiles - Part 7: Seamless tubes, tolerances on dimensions and form Aluminium et alliages daluminium - Barres, tubes et profils fils - Partie 7 : Tubes fils sur aiguille, tolrances sur dimensions et forme Aluminium und Aluminiumlegierungen - Stranggepresste Sta
9、ngen, Rohre und Profile - Teil 7: Nahtlose Rohre, Grenzabmae und Formtoleranzen This European Standard was approved by CEN on 11 April 2016. 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 nati
10、onal standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A ver
11、sion in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus,
12、Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom.
13、 EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 755-7:2016
14、EEN 755-7:2016 (E) 2 Contents Page European foreword . 3 1 Scope 4 2 Normative references 5 3 Alloy groups 5 4 Tolerances on dimensions . 5 4.1 General 5 4.2 Diameter - Round tube 5 4.3 Width, depth or width across flats - squares, rectangles, hexagons, octagons . 6 4.4 Wall thickness variation (ecc
15、entricity) . 7 4.5 Length 8 4.6 Squareness of cut ends 9 5 Tolerances on form 9 5.1 General 9 5.2 Straightness . 9 5.3 Convexity-Concavity 10 5.4 Twist . 11 5.5 Angularity . 12 5.6 Corner and fillet radii . 13 5.7 Depth of dents for round tube . 14 Annex A (informative) Wall thickness variation (ecc
16、entricity) . 15 A.1 General . 15 A.2 Specifying round tube sizes and tolerances . 15 A.2.1 General . 15 A.2.2 Wall thickness variation for tubes specified as OD t or ID t . 15 A.2.3 Wall thickness variation for tubes specified as OD ID . 16 Bibliography . 17 DIN EN 755-7:2016-10 EN 755-7:2016 (E) 3
17、European foreword This document (EN 755-7:2016) 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 e
18、ndorsement, at the latest by December 2016, and conflicting national standards shall be withdrawn at the latest by December 2016. 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
19、 identifying any or all such patent rights. This document supersedes EN 755-7:2008. The following technical modifications have been introduced during the revision: Subclause 4.2, Diameter - Round tube. EN 755 comprises the following parts under the general title Aluminium and aluminium alloys Extrud
20、ed 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 5: Rectangular bars, tolerances on dimensions and form; Part 6:
21、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. According to the CEN/CENELEC Internal Regulations, the national standards orga
22、nizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg,
23、 Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 755-7:2016-10 EN 755-7:2016 (E) 4 1 Scope This European Standard specifies the tolerances on dimensions and form for aluminium and aluminium alloy extruded se
24、amless tubes with an outside diameter (OD) from 8 mm to 450 mm (round tube, see Figure 1) or with a cross section contained within a circumscribing circle (CD) from 10 mm to 350 mm (other than round tube, see Figure 2), supplied in straight lengths. This European Standard only applies to tube produc
25、ed by the seamless die/mandrel method of extrusion. This standard applies to extruded seamless tube for general engineering applications only. The temper designations used in this part are according to EN 515. This European Standard does not apply to: extruded tubes produced by porthole/bridge metho
26、d (EN 755-8), tubes delivered in coils (EN 13957), coiled tubes cut to length (EN 13957). Figure 1 Round tube Figure 2 Circumscribing circle for other than round tube DIN EN 755-7:2016-10 EN 755-7:2016 (E) 5 2 Normative references The following documents, in whole or in part, are normatively referen
27、ced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 755-1:2016, Aluminium and aluminium alloys Extruded rod/bar, tube and pro
28、files Part 1: Technical conditions for inspection and delivery 3 Alloy groups For the purposes of this European Standard, the alloys are distributed into two groups which correspond to varying degrees of difficulty when manufacturing the products. The division into group I and group II of the most c
29、ommonly used general engineering alloys is specified in Table 1. Grouping of other alloys is subject to agreement between supplier 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-6101A, EN A
30、W-6101B, EN AW-6005, EN AW-6005A, EN AW-6106, EN AW-6008 EN AW-6014, EN AW-6060, EN AW-6360, EN AW-6063, EN AW-6063A, EN AW-6463 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-5051A, EN AW-5251, EN AW-5052, EN
31、AW-5154A, EN AW-5454, EN AW-5754, EN AW-5083, EN AW-5086 EN AW-6110A, EN AW-6012, EN AW-6018, EN AW-6023, EN AW-6351, EN AW-6061, EN AW-6261, EN AW-6262, EN AW-6081, EN AW-6082 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 4 Tolerances o
32、n dimensions 4.1 General When outside diameter OD, inside diameter ID, and wall thickness t, (or their equivalent dimensions in other than round tube) are all specified, standard tolerances shall apply to any two of these dimensions, but not to all three. As a result, the purchaser shall only state
33、two nominal dimensions on any given order. 4.2 Diameter - Round tube Mean diameter is defined as the average of two diameter measurements taken at right angles to each other at any position along the length. DIN EN 755-7:2016-10 EN 755-7:2016 (E) 6 The maximum allowable deviation of diameter at any
34、point from the specified diameter is the maximum difference measured at any point along the length of the tube ie it is inclusive of any ovality in the cross section. The tolerances on diameter are specified in Table 2. As detailed in EN 755-1:2016, Clause 4, if the original order does not make clea
35、r the nature of the diameter tolerances required, the supplier shall interpret them as inclusive of any ovality (i.e. maximum allowable deviation at any point from the specified diameter in Table 2). However, the diameter tolerances may be expressed as both mean and inclusive of ovality if this is s
36、pecifically requested by the purchaser. Table 2 Tolerances on diameter for round tube Dimensions in millimetres Diameter (OD or ID) Tolerance on diameter Maximum allowable deviation of mean diameter from specified diameter dMaximum allowable deviation of diameter at any point from specified diameter
37、 aOver Up to and including Tempers F and H112 Heat treated tube bTempers O, H111 and Tx510 8 18 0,25 c 0,40 c 0,60 c 1,5 c 18 30 0,30 0,50 0,70 1,8 30 50 0,35 0,60 0,90 2,2 50 80 0,40 0,70 1,1 2,6 80 120 0,60 0,90 1,4 3,6 120 200 0,90 1,4 2,0 5,0 200 350 1,4 1,9 3,0 7,6 350 450 1,9 2,8 4,0 10,0 aNot
38、 applicable to tubes having a wall thickness less than 2,5 % of the specified outside diameter. The tolerance for tubes with wall thickness less than 2,5 % of the specified outside diameter shall be determined by multiplying the applicable tolerance as follows: wall thickness over 2,0 % up to and in
39、cluding 2,5 % of outside diameter: 1,5 tolerance; wall thickness over 1,5 % up to and including 2,0 % of outside diameter: 2,0 tolerance; wall thickness over 1,0 % up to and including 1,5 % of outside diameter: 3,0 tolerance; wall thickness over 0,5 % up to and including 1,0 % of outside diameter: 4
40、,0 tolerance. bApplies to all alloys in T4, T5, T6, T64, T66 and Tx511 tempers. cThis tolerance applies for outside diameter only, i.e. tube in this size range can only be specified as “Outside Diameter x Wall Thickness”. dNot applicable to Tx510 or Tx511 tempers. 4.3 Width, depth or width across fl
41、ats - squares, rectangles, hexagons, octagons The tolerances on width, depth or width across flats are specified in Table 3. DIN EN 755-7:2016-10 EN 755-7:2016 (E) 7 Table 3 Tolerances on width, depth or width across flats Dimensions in millimetres Width, depth or width across flats Tolerances on wi
42、dth, depth or width across flats a, bCD 100 100 5 - 30 0,30 0,20 30 60 0,40 0,30 60 100 0,60 0,40 100 150 0,90 0,60 150 200 1,2 0,80 200 350 1,8 1,2 5.4 Twist Twist T shall be measured as shown in Figure 5 by placing the tube on a flat base plate, the tube resting under its own mass and measuring th
43、e maximum distance at any point along the length between the bottom surface of the tube and the base plate surface. Twist tolerances are specified in Table 9 as a function of the width W and the length L of the tube. DIN EN 755-7:2016-10 EN 755-7:2016 (E) 12 Key 1 base plate Figure 5 Measurement of
44、twist Table 9 Twist tolerances Dimensions in millimetres Width W Twist tolerance T per 1 000 mm of length aOn total tube length L Over Up to and including up to and including 6 000 over 6 000 10 30 1,2 2,5 3,0 30 50 1,5 3,0 4,0 50 100 2,0 3,5 5,0 100 200 2,5 5,0 7,0 200 350 2,5 6,0 8,0 aTwist tolera
45、nces for lengths less than 1 000 mm shall be subject to agreement between supplier and purchaser. 5.5 Angularity The deviation from square of square and rectangular tubes shall be measured as shown in Figure 6. The maximum allowable deviation from square is specified in Table 10 as a function of tub
46、e depth B. In case of rectangular tubes, the tolerance on squareness shall apply to the shorter side of the tube. The maximum allowable deviation in an angle other than a right angle (hexagonal tubes, octagonal tubes) shall be included within the width across flats tolerances, see Table 3. DIN EN 75
47、5-7:2016-10 EN 755-7:2016 (E) 13 Figure 6 Measurement of deviation from square Table 10 Squareness tolerances for square and rectangular tubes Dimensions in millimetres Depth B Maximum allowable deviation Z from square Over Up to and including - 30 0,4 30 50 0,7 50 80 1,0 80 120 1,4 120 180 2,0 180
48、240 2,6 240 350 3,1 5.6 Corner and fillet radii Sharp corners and fillet radii may be slightly rounded unless otherwise indicated on the drawing. The maximum allowable radii are specified in Table 11. When corner or fillet radius is specified, the maximum allowable deviation from the nominal value i
49、s specified in Table 12. Table 11 Maximum allowable corner and fillet radii Dimensions in millimetres Wall thickness Maximum allowable corner and fillet radii Alloy group I Alloy group II a 5 0,6 0,8 5 1,0 1,5 aThese tolerances only apply to 6xxx series alloys in group II. The maximum allowable radii for the other alloys in group II shall be subject to agreement bet
