1、 Reference number ISO 7271:2011(E) ISO 2011INTERNATIONAL STANDARD ISO 7271 Second edition 2011-06-15 Aluminium and aluminium alloys Foil and thin strip Dimensional tolerances Aluminium et alliages daluminium Feuilles et bandes minces Tolrances dimensionnelles ISO 7271:2011(E) COPYRIGHT PROTECTED DOC
2、UMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member bod
3、y in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2011 All rights reservedISO 7271:2011(E) ISO 2011 All rights reserved iiiContents Page Forewo
4、rd iv 1 Scope1 2 Preferred thicknesses.1 3 Thickness tolerances2 4 Width tolerances3 5 Ordering information.3 Annex A (normative) Alloy group for foil .5 ISO 7271:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of nat
5、ional standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. Interna
6、tional organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the r
7、ules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by a
8、t least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 7271 was prepared by Technical Committee ISO/TC
9、 79, Light metals and their alloys, Subcommittee SC 6, Wrought aluminium and aluminium alloys. This second edition cancels and replaces the first edition (ISO 7271:1982), which has been technically revised. INTERNATIONAL STANDARD ISO 7271:2011(E) ISO 2011 All rights reserved 1Aluminium and aluminium
10、 alloys Foil and thin strip Dimensional tolerances 1 Scope This International Standard specifies dimensional tolerances for aluminium and aluminium alloy foil and thin strip for general purposes. It is applicable to the following types of product, shipped in rolls: double-rolled foil, of aluminium o
11、r aluminium alloys having a minimum mass fraction of aluminium of 98 %, with one side matt and the other side bright, and of thicknesses in the range 0,006 mm (6 m) to 0,050 mm (50 m) inclusive; single-rolled foil and thin strip, of aluminium or aluminium alloys having a minimum mass fraction of alu
12、minium of 98 % or of alloys shown in Annex A or similar, with both sides the same, and of thicknesses in the range 0,021 mm (21 m) to 0,200 mm (200 m). NOTE According to the conventions in use in different countries, the limit of the thickness range can be different. The most commonly used general e
13、ngineering alloys for foil are specified in Annex A. 2 Preferred thicknesses Preferred thicknesses apply to double-rolled foil only, see Table 1. Table 1 Preferred thicknesses Nominal thickness Covering area aNominal thickness Covering area amm m m 2 /kg mm m m 2 /kg 0,006 6 61,7 0,018 18 20,6 0,007
14、 7 52,9 0,020 20 18,5 0,008 8 46,3 0,022 22 16,8 0,009 9 41,2 0,025 25 14,8 0,010 10 37,0 0,028 28 13,2 0,011 11 33,7 0,030 30 12,3 0,012 12 30,9 0,035 35 10,6 0,014 14 26,5 0,040 40 9,3 0,016 16 23,1 0,045 45 8,2 0,050 50 7,4 aCalculated on the basis of a density of 2 700 kg/m 3 . ISO 7271:2011(E)
15、2 ISO 2011 All rights reservedCovering areas for other values of density are calculated using the following equation: 1 a dt = where a is the covering area, in square metres per kilogram; t is the thickness, in metres; d is the density, in kilograms per cubic metre. NOTE The density, d, can be obtai
16、ned by looking up the international alloy designations given in Table A.1. 3 Thickness tolerances 3.1 General The thickness tolerances given in Table 2 refer to the intended thickness, i.e. to the thickness that is fixed on the rolling mill. Table 2 Thickness tolerances Size of batch kg Tolerance on
17、 average thickness 10 000 10 % 10 000 8 % 3.2 Average thicknesses The determination of average thicknesses shall be carried out by a method in which more than 50 % of the measurements shall be within 5 % of the average. Rolls of the same nominal thicknesses, of the same width, of the same minimum pu
18、rity or alloy, of the same condition, and of the same consignment (or considered as such) shall form one batch. 3.3 Point thicknesses 3.3.1 General The point thickness is 10 % of the nominal thickness. Measurement shall be carried out by a method in which more than 50 % of the measurements shall be
19、within 5 % of the average. In case of dispute, the following gravimetric method, based on weighing a sample of known area, shall be used for arbitration purposes. ISO 7271:2011(E) ISO 2011 All rights reserved 33.3.2 Description of the weighing method For the test sample, cut an area A of approximate
20、ly 1 dm 2 , either square or circular. Degrease the sample, if necessary, in a suitable solvent and weigh on a laboratory balance with an accuracy of equal to or better than 1 mg. The dimensions of the sample (sides of square or diameter of circle) shall be measured with an accuracy of equal to or b
21、etter than 0,1 mm. Gauge shall be calculated according to the following equation: 10 M E A D = where E is the gauge, in micrometres; M is the mass, in milligrams; D is the density, in grams per cubic centimetre; A is the area, in square decimetres. NOTE The density, D, can be obtained by looking up
22、the international alloy designations given in Table A.1. 4 Width tolerances Width tolerances are given in Table 3. Table 3 Width tolerances Dimensions in millimetres Width tolerance (for all thicknesses) Width symmetrical all plus all minus 1 000 1 2 0 +0 2 1 000 2 4 0 +0 4 5 Ordering information Th
23、e order shall include the following information: quantity, in kilograms; minimum mass fraction of aluminium or alloy designation; temper (hard, soft or intermediate); thickness, in millimetres or micrometres, and tolerance and, if specified, point thickness; ISO 7271:2011(E) 4 ISO 2011 All rights re
24、served width, in millimetres (type of tolerance, if necessary); surface aspect (indication of whether the bright or matt side is to be on the outside); dimension of rolls (length, in metres, or outside diameter, in millimetres); type and inside diameter of the core, in millimetres (with or without s
25、lot); length of core (if different from the width of the rolls). ISO 7271:2011(E) ISO 2011 All rights reserved 5Annex A (normative) Alloy group for foil The most commonly used general engineering alloys for foil are specified in Table A.1. Table A.1 Alloy group for foil Alloy designation a1050, 1050
26、A, 1070, 1085, 1100, 1145, 1200, 1230A, 1235 3003, 3103, 3004, 3005, 3105 5005, 5052 8006, 8008, 8011, 8011A, 8111, 8014, 8021, 8021B, 8079 aThe four-digit numbers listed are taken from the Registration of International Alloy Designations and Chemical Composition Limits for Wrought Aluminium Alloys, published by the Aluminum Association, 1525 Wilson Boulevard, Suite 600, Arlington, VA 22209, USA (known as “Teal Sheets”). ISO 7271:2011(E) ICS 77.150.10 Price based on 5 pages ISO 2011 All rights reserved
