1、BRITISH STANDARD BS1473:1972 Incorporating Amendment Nos.1 and2 Specification for Wrought aluminium and aluminium alloys for general engineering purposes Rivet, bolt and screw stockBS1473:1972 This British Standard, having been approved by the Non-ferrousMetals Industry Standards Committee, was publ
2、ished under the authority ofthe Executive Board on 15March 1972 BSI 03-1999 First published, December, 1949 First revision, December, 1955 Second revision, September, 1963 Third revision, August, 1969 Fourth revision, March, 1972 The following BSI references relate to the work on this standard: Comm
3、ittee reference NFE/19 Draft for approval70/30839 ISBN 580 07090 5 Co-operating organizations The Non-ferrous Metals Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and indu
4、strial organizations: Aluminium Federation* Institution of Mining and Metallurgy Association of Bronze and Brass Founders Institution of Production Engineers British Bronze and Brass Ingot Institution of Structural Engineers* Manufacturers Association Lead Development Association British Electrical
5、and Allied Manufacturers 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 High Ministry of Defence, Nav
6、y Department* Conductivity Copper Group National Brassfoundry Association British Non-ferrrous Metals Research Non-ferrous metal stockists* Association* Post Office Copper Development Association Royal Institute of British Architects Department of Trade and Industry (Marine Society of Motor Manufact
7、urers and Traders Division) Ltd* Electric Cable Makers Confederation Tin Research Institute Institute of British Foundrymen Zinc Development Association Institute of Metals Individual manufacturers Institution of Mechanical Engineers (Automobile Division) The Government departments and scientific an
8、d industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: ALARS (Association of Light Alloy Refiners Lloyds Register of Shipping and Smelters) London Transport
9、 Executive British Aluminium Holloware Manufacturers National Association of Drop Forgers and Association Stampers Department of Trade and Industry National Federation of Vehicle Trades Gas Council Small Rivet Association Institute of Sheet Metal Engineering Welding Institute Amendments issued since
10、 publication Amd. No. Date Comments 3374 June1980 4477 February1984 Indicated by a sideline in the marginBS1473:1972 BSI 03-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 General 1 3 Definitions 1 4 Freedom from defects 1 5 Chemical composition 1 6 Conditi
11、on 1 7 Sizes and tolerances 1 8 Selection of test samples 2 9 Mechanical tests 2 10 Retests 2 11 Certificate of compliance 2 12 Inspection 2 13 Independent test 2 14 Facilities for testing 3 15 The rounding of numbers rule 3 Appendix A Forms of material available 5 Appendix B The annealing and heat
12、treatment of wrought aluminium and its alloys 5 Appendix C Details of the international alloy designation and chemical composition limits for wrought aluminium alloys system 6 Appendix D Designation cross-references 7 Table 1 Tolerances 1 Table 2 deleted 3 Table 3 Chemical composition and mechanical
13、 properties of aluminium and aluminium alloy rivet, bolt and screw stock 4BS1473:1972 ii BSI 03-1999 Foreword A complete list of British Standards, numbering over5000, fully indexed and with a note on the contents of each, will be found in the British Standards Yearbook, which may be purchased from
14、BSI Sales Department. It may also be consulted in many public libraries and similar institutions. This standard makes reference to the following British Standards: BS18, Methods for tensile testing of metals Part1. Nonferrous metals. BS1499, Sampling non-ferrous metals. BS1728, Methods for the analy
15、sis of aluminium and aluminium alloys. BS3660, Glossary of terms used in the wrought aluminium industry. This British Standard is the second revision in metric terms of one of a series for aluminium and aluminium alloys in various wrought forms for general engineering purposes, the preparation of wh
16、ich was authorized by the Non-ferrous Metals Industry Standards Committee. In accordance with International agreement this introduces N/mm 2as the unit for expressing stress values but otherwise the standard reflects only minor changes since the1969 edition. Others in the series are: BS1470, Wrought
17、 aluminium and aluminium alloys for general engineering purposes. Plate, sheet and strip. BS1471, Wrought aluminium and aluminium alloys for general engineering purposes. Drawn tube. BS1472, Wrought aluminium and aluminium alloys for general engineering purposes. Forging stock and forgings. BS1474,
18、Wrought aluminium and aluminium alloys for general engineering purposes. Bars, extruded round tube and sections. BS1475, Wrought aluminium and aluminium alloys for general engineering purposes. Wire. In preparing the previous revision of this metric specification cognizance was taken of the recommen
19、dations of the International Organization for Standardization (ISO). Alloy compositions and properties were brought in line with ISO recommendations where this was practicable and the temper designations quoted are those proposed by ISO. Thus work-hardened tempers of the strain-hardened materials, f
20、ormerly show as H, H, H and H, are designated with the appropriate symbol selected from the range H1 to H8, which represents a scale of increasing strength. The condition of heat-treated alloys is also indicated by the letter T followed by a B, D, E, F or H indicating the precise condition following
21、 the heat treatment. Advantage was also taken of the opportunity to rationalize the number of materials offered and certain alloys and purities whose usage did not justify retention, were deleted. This applied to aluminium1C. All tables of tolerances were reviewed and metric values in accordance wit
22、h latest production practices are quoted. In this edition the stress values have been converted into SI units (N/mm 2 )from the original hbar values. Appendix A gives information relating to forms of material available, and in Appendix B information is given on annealing and heat treatment. As a maj
23、or step towards alignment of aluminium and aluminium alloy compositions on an international basis, 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 “Registrat
24、ion Record of International Alloy Designations and Chemical Composition Limits for Wrought Aluminum Alloys”.BS 1473:1972 BSI 03-1999 iii 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
25、formerly used. In some cases, minor compositional changes are also involved. The details of the system are given in Appendix C and a cross-reference table between the new, the old and the nearest equivalent ISO designations is included as Appendix D. The temper designations and associated mechanical
26、 property requirements remain unaltered for the present and therefore may not necessarily align precisely with those in the standards of other countries. NOTEAttention is drawn to certification facilities offered by BSI; see the back cover of this standard. A British Standard does not purport to inc
27、lude 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, page
28、s i to iv, pages1to7 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 blankBS 1473:1972 BSI 03-1999 1 1 Scope This British Standard specifies requirements for rive
29、t stock of diameter up to and including25mm made from one grade of aluminium and from four aluminium alloys in various conditions, and for bolt and screw stock of diameter up to and including12mm made from four aluminium alloys in various conditions. NOTEThe titles of the British Standards referred
30、to in this standard are listed on page2. 2 General The rivet, bolt and screw stock shall comply with the general requirements set out in the following clauses and with the appropriate requirements given in Table 1 and Table 3. 3 Definitions For the purposes of this British Standard, the following de
31、finitions apply: 3.1 purchaser the party, whether user, retailer, wholesaler or corporate body or their agent(s) as appropriate, responsible for ordering the material standardized 3.2 rivet stock (extracted from BS3660) round bar or wire suitable for the manufacture of rivets 3.3 bolt stock (extract
32、ed from BS3660) round bar or wire suitable for the manufacture of bolts by cold heading 3.4 screw stock (extracted from BS3660) round bar or wire suitable for the manufacture of screws by cold heading. 4 Freedom from defects The material shall be free from defects prejudicial to its use. 5 Chemical
33、composition The chemical composition shall comply with the appropriate requirements given in Table 3. 6 Condition The material shall be supplied in one of the following conditions as specified by the purchaser and selected from Table 3. 7 Sizes and tolerances The diameter of the rivet, bolt and scre
34、w stock shall be as specified in the order, subject to the tolerances given in Table 1. Table 1 Tolerances M As manufactured. Material which acquires some temper from shaping processes in which there is no special control over thermal treatment or amount of strain hardening. O Annealed. Material whi
35、ch is fully annealed to obtain the loweststrength condition. H1, H2 H3, H4 H5, H6 H7, H8 Strain hardened. Material subjected to the application of cold work after annealing (orhot forming) or to a combination of cold work and partial annealing/stabilizing in order to secure the specified mechanical
36、properties. The designations are in ascending order of tensile strength. TB Solution heat-treated and naturally aged. Material that receives no cold work after solution heat treatment except as may be required to flatten or straighten it. Properties of some alloys in this temper are unstable. TD Sol
37、ution heat-treated, cold worked and naturally aged. TE Cooled from an elevated temperature shaping process and precipitation-treated. TF Solution heat-treated and precipitation-treated. TH Solution heat-treated, cold worked and then precipitation-treated. Diameter Tolerance mm mm 1.0 up to and inclu
38、ding 5.0 0.025 Over 5.0 up to and including 10.0 0.035 Over10.0 up to and including 14.0 0.05 Over14.0 up to and including 20.0 0.06 Over20.0 up to and including 25.0 0.07BS 1473:1972 2 BSI 03-1999 8 Selection of test samples 8.1 Rivet, bolt and screw stock of aluminium or non-heat treatable alumini
39、um alloys. Material of the same diameter, produced in the same way and of the same composition, shall be grouped into batches not exceeding 250kg in weight, and one test sample shall be cut from a coil of length selected from each batch. Before the test samples are cut off they shall be marked to id
40、entify them with the batch they represent. The tensile test samples shall be taken from the rivet-stock as supplied and shall not be annealed or mechanically worked before being tested. For rivet or bolt stock of aluminium or aluminium alloy supplied in the O or M condition up to12mm diameter, and o
41、f aluminium alloy supplied in the H2 or H4 condition of6mm diameter or less, the reverse torsion test samples shall be tested in the condition as supplied. For aluminium alloy in the H2 or H4 condition in diameters of over6mm up to and including12mm the reverse torsion test samples shall be annealed
42、 before testing. 8.2 Rivet, bolt and screw stock of heat-treatable aluminium alloys supplied in the H2 condition. Material of the same diameter, produced in the same way and of the same composition, shall be grouped into batches not exceeding250kg in weight and one test sample shall be cut from a co
43、il or length selected from each batch. Before the test samples are cut off they shall be marked to identify them with the batch they represent. The tensile test samples shall be tested in the TB or TF condition as specified by the purchaser. For rivet or bolt stock of6mm diameter or less the reverse
44、 torsion test samples shall be tested in the condition as supplied. For stock of diameter greater than6mm up to and including12mm the reverse torsion test samples shall be annealed before testing. 9 Mechanical tests The following test shall be made on test pieces prepared from test samples as specif
45、ied in8.1 and8.2. 9.1 Tensile test. The tensile test shall be made in accordance with the requirements of BS18, Part1. The values obtained shall comply with the appropriate requirements given in Table 3. 9.2 0.2% Proof stress (applicable to bolt and screw stock only). The proof stress shall be deter
46、mined as specified in BS18, Part1. The values obtained shall comply with the appropriate requirements given in Table 3. 9.3 Reverse torsion test (applicable only to rivet, bolt and screw stock12mm diameter and smaller). A length of rivet, bolt or screw stock shall be gripped in two jaws150mm apart,
47、one of which shall be free to rotate. The other shall not rotate but may be free to move longitudinally during the test. The free end shall be turned six times through360 and shall then be turned the same number of times through360 in the opposite direction. No defects detrimental to cold forging sh
48、all be exhibited as a result of this test. 10 Retests Should any one of the test pieces first selected fail to pass the mechanical tests, two further samples from the same batch shall be selected for testing, one of which shall be from the rivet, bolt or screw stock from which the original test samp
49、le was taken, unless that has been withdrawn by the supplier. For heat-treatable alloys the supplier shall have the right, if he so desires, to re-heat-treat the material before the two further samples are selected. Should the test pieces, from both these additional samples pass, the batch represented by the test samples shall be deemed to comply with the requirements of this standard. Should the test pieces from either of these additional samples fail, the batch represented by the test samples shall be deemed not to comply with the requirements of this s
