1、BRITISH STANDARD BS2627:1970 Incorporating Amendment No. 1 Specification for Wrought aluminium For electrical purposes WireBS2627:1970 This British Standard, having been approved by the Non-FerrousMetals Industry Standards Committee, was published under the authority ofthe Executive Board on 28Janua
2、ry1970 BSI 03-1999 First published July,1955 First revision October,1961 Second revision January,1970 The following BSI references relate to the work on this standard: Committee reference NFE/24 Draft for comment 68/22309 ISBN 580 05555 8 Co-operating organizations The Non-ferrous Metals Industry St
3、andards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Aluminium Federation* Institution of Mechanical Engineers Association of Bronze and Brass Founders (Automo
4、bile Division) Association of Consulting Engineers Institution of Mining and Metallurgy Board of Trade Institution of Production Engineers British Bronze and Brass Ingot Institution of Structural Engineers Manufacturers Association Lead Development Association British Electrical and Allied Manufactu
5、rers Light Metal Founders Association Association* London Metal Exchange British Lead Manufacturers Association Magnesium Industry Council British Non-Ferrous Metals Federation Ministry of Defence, Army Department British Non-Ferrous Metals Federation Ministry of Defence, Navy Department High Conduc
6、tivity Copper Group National Brassfoundry Association British Non-ferrous Metals Research Non-ferrous Metal Stockists* Association Post Office* Copper Development Association Royal Institute of British Architects Crown Agents for Overseas Governments Society of Motor Manufacturers and Traders and Ad
7、ministrations Ltd. Electric Cable Makers Confederation* Tin Research Institute Institute of British Foundrymen Zinc Development Association Institute of Metals Individual manufacturer The Government department and scientific and industrial organizations marked with an asterisk in the above list, tog
8、ether with the following, were directly represented on the committee entrusted with the preparation of this British Standard: British Railways Board Institute of Iron and Steel Wire Electricity Supply Industry in England and Manufacturers Wales Institute of Sheet Metal Engineering Amendments issued
9、since publication Amd. No. Date Comments 3377 June 1980 Indicated by a sideline in the marginBS2627:1970 BSI 03-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 General requirements 1 1.1 Scope 1 1.2 Definitions 1 1.3 Freedom from defects 1 1.4 Joints 1 1.5 Tolerances
10、 on diameter 1 1.6 Selection of test samples 1 1.7 Tensile test 1 1.8 Elongation test 1 1.9 Wrapping test 1 1.10 Electrical resistivity test 1 1.11 Retests 1 1.12 Certificate of compliance 2 1.13 Inspection 2 1.14 Independent test 2 1.15 Facilities for testing 2 2 Specific requirements 2 Material 13
11、50 2 2.1 General 2 2.2 Chemical composition limits 2 2.3 Condition 3 2.4 Mechanical properties 3 2.5 Wrapping test 4 2.6 Electrical resistivity 4 Appendix A Standard values (for information only) 5 Appendix B Details of the international alloy designations and chemical composition limits for wrought
12、 aluminium alloys system 5BS2627:1970 ii BSI 03-1999 Foreword In order to keep abreast of progress in the industries concerned, British Standards are subject to periodical review. Suggestions for improvements will be recorded and in due course brought to the notice of the committees charged with the
13、 revision of the standards to which they refer. A complete list of British Standards, numbering over 5000, fully indexed and with a note of the contents of each, will be found in the British Standards Yearbook, price 20s. The BS Yearbook may be consulted in many public libraries and similar institut
14、ions. This standard makes reference to the following British Standards: BS18, Methods for the tensile testing of metals. BS18-1, Non-ferrous metals. BS1499, Sampling non-ferrous metals. BS1728, Methods for the analysis of aluminium and aluminium alloys. BS3239, Determination of resistivity of metall
15、ic electrical conductor materials. This British Standard was first published in1955under the authority of the Non-ferrous Metals Industry Standards Committee and at the request of the Aluminium Industry, in view of the increasing use of aluminium for electrical conductors of many types, and a revise
16、d edition was prepared in1961. In this edition all dimensions are shown in metric units which are not exact equivalents of the original inch values. The three conditions previously covered have been replaced by six conditions the designations of which have been based on the system under consideratio
17、n by ISO/TC79 “Light metals and their alloys”. The new designations of the six conditions bear the following relationship to the superseded designations: The conditions H4, H8and H68have been introduced to cover the requirements for wire for insulated cables in addition to the#H condition formerly u
18、sed for this purpose. All stresses are quoted in terms of the hectobar (hbar) 1) . As in the earlier edition a wrapping test is specified for the harder conditions but this is replaced by an elongation test for material in the H6condition in larger diameters (i.e.greater than5mm). In deciding on the
19、 resistivity values and associated physical properties to be quoted in this standard the committee took into account the relevant IEC Recommendations, namely IEC111:1959, “Recommendation for the resistivity of commercial hard-drawn aluminium electrical conductor wire”, and IEC121:1960, “Recommendati
20、on for commercial annealed aluminium electrical conductor wire”. New designation Superseded designation 0 0 H4 No previous equivalent condition H6 #H H8 No previous equivalent condition H68 No previous equivalent condition The designation H68refers to material, the tensile strength of which embraces
21、 those of H6 and H8. H9 H 1) 1hbar=10MN/m 2 =10N/mm 2 .BS2627:1970 BSI 03-1999 iii BS1473, “Rivet, bolt and screw stock” and BS1475, “Wire”, refer to wire used for general engineering and other purposes, and form part of a comprehensive series of standards already available for wrought aluminium and
22、 aluminium alloys for general engineering purposes (BS1470-75). The present standard is one of a similar series of standards for wrought aluminium and aluminium alloys for electrical purposes. As a major step towards alignment of aluminium and aluminium alloy compositions on an international basis,
23、a substantial number of countries have agreed to adopt a4-digit classification for alloy composition designation. This system is administered by the Aluminium Association Inc., who issue the “Registration Record of International Alloy Designations and Chemical Composition Limits for Wrought Aluminiu
24、m Alloys”. By amendment, it has been decided to introduce this system into the British Standards concerned with these types of material in place of the material designations formerly used. The details of the system are given in Appendix B. The temper designations and associated mechanical property r
25、equirements remain unaltered for the present and therefore may not necessarily align precisely with those in the standards of other countries. Material1350therefore replaces material G1E. Minor compositional changes have been made. Other standards in this series are: BS2897, Wrought aluminium for el
26、ectrical purposes Strip with drawn or rolled edges. BS2898, Wrought aluminium and aluminium alloys for electrical purposes Bars, extruded round tube and sections. BS3988, Wrought aluminium for electrical purposes Solid conductors for insulated cables. A British Standard does not purport to include a
27、ll 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, pagesi toi
28、v, pages1to5 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 theinside front cover.iv blankBS2627:1970 BSI 03-1999 1 1 General requirements 1.1 Scope This British Standard specifies requi
29、rements for aluminium round Wire for electrical conductors in six conditions and in diameters0.4mm up to and including10mm. 1.2 Definitions For the purpose of this British Standard the following definition applies: Wire: A round solid section of not more than10mm diameter produced by drawing. 1.3 Fr
30、eedom from defects The wire shall be free from defects prejudicial to its use as an electrical conductor. 1.4 Joints There shall be no joints in the wire except those made in the base rod or wire before final drawing or, by agreement between the purchaser and the supplier, those made after final dra
31、wing by a cold welding method. Joints made in this way shall comply with the other requirements of the standard. 1.5 Tolerances on diameter The diameter of round wire determined by means of a suitable micrometer and by taking the mean of the two measurements at right angles made at the same cross se
32、ction of a sample taken from any part of a coil, reel or drum shall be as ordered within a tolerance of 1%. The difference between the maximum and minimum measurements, taken at the same cross section, shall not exceed1%. 1.6 Selection of test samples Test samples for the tensile test, wrapping test
33、 and electrical resistivity tests specified in1.7, 1.8, 1.9 and1.10 shall be selected as follows: Wire of the same diameter, produced in the same way and of the same condition, shall be grouped into batches not exceeding the weights given below, and test samples shall be cut from a coil selected fro
34、m each batch. Before the test samples are cut off they shall be marked to identify them. The test samples shall be taken from the wire as supplied and shall not be annealed or mechanically worked other than straightening before testing. 1.7 Tensile test The test shall be made in accordance with BS18
35、-1 2) . The load shall be applied gradually and the rate of separation of the jaws of the testing machine shall be not less than25mm per minute and not greater than100mm per minute. 1.8 Elongation test The test shall be made in accordance with BS18-1 2) . The load shall be applied gradually and unif
36、ormly on straightened lengths of wire, having an original gauge length of250mm. The elongation shall be measured on the gauge length after the fractured ends have been fitted together. The determination shall be valid, whatever the position of the fracture, if the specified value is reached. If the
37、specified value is not reached, the determination shall be valid only if the fracture occurs between the gauge marks and not closer than25mm to either mark. 1.9 Wrapping test The wire shall be wrapped round a wire of its own diameter to form a close helix of eight turns. Six turns shall then be unwr
38、apped and again closely re-wrapped in the same direction as the first wrapping. 1.10 Electrical resistivity test The resistivity shall be determined by direct measurement on the wire in accordance with the routine method given in BS3239 3) . 1.11 Retests Should any one of the test pieces first selec
39、ted fail to pass the mechanical or resistivity tests, two further samples from the same batch shall be selected for testing, one of which shall be from the length from which the original test sample was taken, unless that length has been withdrawn by the supplier. Should the test pieces from both th
40、ese additional samples satisfy the requirements of the mechanical or resistivity tests, the batch represented by these samples shall be deemed to comply with the standard. Should the test pieces from either of the two additional samples fail, the batch represented shall be deemed not to comply with
41、the standard. Wire diameter Weight of batch mm kg 0.4up to and including1.25 250 over1.25 1000 2) BS18, “Methods for the tensile testing of metals”, Part1, “Non-ferrous metals”. 3) BS3239, “Determination of resistivity of metallic electrical conductor materials”.BS2627:1970 2 BSI 03-1999 1.12 Certif
42、icate of compliance The supplier shall, if required, certify that the material complies with the requirements of this standard. 1.13 Inspection If the purchaser wishes to inspect the material at the suppliers works he shall notify the supplier at the time of placing the order. 1.14 Independent test
43、Should there be a dispute about the compliance of the material with regard to the chemical composition or test requirements of this standard, the purchaser and the supplier shall have the right to have tests made by a mutually acceptable testing authority. The results obtained by the independent tes
44、ting authority shall be accepted as final. If the material does not comply with the standard, the cost of independent testing shall be borne by the supplier; if the material complies with the standard the cost shall be borne by the purchaser. The method of sampling for analysis shall be in accordanc
45、e with BS1499 4) ; the methods of analysis shall be in accordance with BS1728 5) , where the appropriate method exists, and the method for determining resistivity shall be in accordance with the reference method in BS3239 6) . 1.15 Facilities for testing The supplier shall make the necessary arrange
46、ments for carrying out the tests required by this standard. Material 1350 (former BS designation G1E) 2 Specific requirements 2.1 General The material shall comply with the general requirements of Section1 and shall have the following chemical composition, condition and mechanical properties. 2.2 Ch
47、emical composition limits 7)8) The chemical composition of material1350shall be as follows: 4) BS1499, “Sampling non-ferrous metals”. 5) BS1728, “Methods for the analysis of aluminium and aluminium alloys”. 6) Bs 3239, “Determination of resistivity of metallic electrical conductor materials”. 7) Com
48、position in per cent maximum unless shown as a range or a minimum. 8) For the purposes of determining conformance to these limits, an observed value or a calculated value obtained from analysis is rounded off to the nearest unit in the last right-hand place of figures used in expressing the specifie
49、d limit, in accordance with the following. When the figure next beyond the last figure or place to be retained is less than5, the figure in the last place retained should be kept unchanged. When the figure next beyond the last figure or place to be retained is greater than5, the figure in the last place retained should be increased by1. When the figure next beyond the last figure or place to be retained is5and a) there are no figures, or only zeros, beyond this5, if the figure in the last place to be retained is odd, it should be increased by1; if even, it shoul
