1、BRITISH STANDARD BS 3332:1987 Specification for White metal bearing alloy ingots UDC 669.65.018.24-412BS3332:1987 This British Standard, having been prepared under the directionof the Non-ferrous Metals Standards Committee, waspublished under the authorityof the Board of BSI andcomes intoeffect on 3
2、0 January 1987 BSI 07-1999 First published January 1961 First revision January 1987 The following BSI references relate to the work on this standard: Committee reference NFM/27 Draft for comment 85/38275 DC ISBN 0 580 15603 6 Committees responsible for this British Standard The preparation of this B
3、ritish Standard was entrusted by the Non-ferrous Metals Standards Committee (NFM/-) to Technical Committee NFM/27, upon which the following bodies were represented: Association of British Pewter Craftsmen British Steel Industry Electric Cable Makers Confederation Electronic Engineering Association I
4、nternational Tin Research Institute London Metal Exchange Metal Packaging Manufacturers Association Solder Makers Association Coopted members The following were also represented in the drafting of the standard, through subcommittees and panels: BNF Metals Technology Centre British Telecommunications
5、 plc Ministry of Defence Society of British Aerospace Companies Limited Telecommunication Engineering and Manufacturing Association (TEMA) Amendments issued since publication Amd. No. Date of issue CommentsBS3332:1987 BSI 07-1999 i Contents Page Committees responsible Inside front cover Foreword ii
6、1 Scope 1 2 Definitions 1 3 General requirements 1 4 Chemical composition and alloy designation 1 5 Selection and preparation of test samples 1 6 Test methods 1 7 Retests 1 8 Identification and marking 1 9 Certificate of compliance 1 Table 1 Chemical composition and alloy designation of white metal
7、bearing alloy ingots 2 Publications referred to Inside back coverBS3332:1987 ii BSI 07-1999 Foreword This British Standard has been prepared under the direction of the Non-ferrous Metals Standards Committee and is the first revision of BS3332:1961, which is withdrawn. This revision specifies require
8、ments for eight white metal bearing alloys in ingot form. Only three of the original alloys in the1961 edition, alloys 2, 8 and9, have been retained, though with slight amendments. The remaining five alloys in this revision are related to alloys in ISO4381. Bearing alloys in other materials are cove
9、red by BS5812 and by certain alloys in BS1400. WARNING. Some of the substances described in this standard (such as lead and cadmium) may be injurious to health unless adequate safety precautions are taken. The standard refers only to technical requirements and tests and in no way absolves either the
10、 supplier or the user from statutory obligations relating to health and safety, at any stage of manufacture or use. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a B
11、ritish Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1and2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments i
12、ncorporated. This will be indicated in the amendment table on the inside front cover.BS3332:1987 BSI 07-1999 1 1 Scope This British Standard specifies the requirements for chemical composition, testing and identification for eight white metal bearing alloys in ingot form, four tin-rich and four lead
13、-rich, used for casting plain bearings. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this British Standard the following definitions apply. 2.1 ingot a cast, unwrought product in a form suitable only for remelt
14、ing 2.2 batch a series of ingots cast from a single uniform melt 2.3 consignment a quantity of white metal bearing alloy ingots, consisting of one or more batches, of the same alloy designation, delivered at the same time 3 General requirements The white metal bearing alloy ingots shall comply with
15、clauses4 and8. Should any sample selected and prepared in accordance with clause5 and tested in accordance with clause6 fail to comply with clause4, then the provision for retests shall be as specified in clause7. NOTEIn the event of any dispute concerning compliance of the ingots with the requireme
16、nts of this standard, it is normal commercial practice for the supplier and the purchaser to have tests undertaken by a mutually acceptable independent testing authority, and to accept the results of such tests as final. 4 Chemical composition and alloy designation The chemical composition and alloy
17、 designation of the ingots shall be as given inTable 1. The results of chemical analysis shall be subject to the application of the rounding rules in accordance with BS1957. 5 Selection and preparation of test samples Sample ingots for testing to verify compliance of the batch with clause4 shall be
18、selected and prepared for analysis in accordance with BS3338-14. 6 Test methods The samples selected and prepared in accordance with clause5 shall be analysed by the use of recognized chemical or instrumental analytical procedures. In cases of dispute, the relevant methods for the analysis of white
19、metal bearing alloys described in BS3338-8 to BS3338-10, BS3338-13, and BS3338-15 to BS3338-20 shall be used. 7 Retests If a sample selected and prepared in accordance with clause5 fails when tested to comply with the requirements for chemical composition given in clause4, a retest shall be permitte
20、d. Two further samples from the same batch shall be selected and prepared in accordance with clause5, and tested. One of these further samples shall be prepared from the same ingots as those selected and used for preparing the original sample, unless those ingots have been withdrawn from the batch.
21、Should both the further samples comply with clause4, then the batch of ingots represented shall be deemed to comply with this standard. Should either of the samples fail, then the batch of ingots represented shall be deemed not to comply with this standard. 8 Identification and marking Each batch sh
22、all be identified by a unique batch number. Ingots within a consignment shall be segregated into batches. Each batch within the consignment shall be tallied by suitable means, with its batch number, the alloy designation and the manufacturers mark. This identification shall be maintained in such a m
23、anner as to enable the ingots corresponding to a particular batch number to be correlated with the relevant test records and/or certificate(s). Ingots of nominal mass 5kg or over shall be individually marked with the alloy designation and the manufacturers mark. 9 Certificate of compliance The suppl
24、ier shall, if requested, certify that the ingots comply with this British Standard.BS 3332:1987 2 BSI 07-1999 Table 1 Chemical composition and alloy designation of white metal bearing alloy ingots Alloy designation Type Chemical composition % (m/m) Related to ISO4381 alloys Sn Sb Cu Pb Cd As Ni Zn B
25、i Fe Al Total of others A Tin-rich Remainder 7.0 to 8.0 3.0 to 4.0 0.35 0.05 0.1 0.005 0.08 0.10 0.005 0.2 SnSb8Cu4 B Tin-rich Remainder 7.0 to 8.0 3.0 to 4.0 0.35 0.8 to 1.2 0.5 0.1 to 0.5 0.005 0.08 0.05 0.005 0.2 SnSb8Cu4Cd C Tin-rich Remainder 8.5 to 10.0 3.5 to 5.0 0.35 0.05 0.1 0.005 0.08 0.10
26、 0.005 0.2 D Tin-rich 66.0 to 71.0 0.50 1.0 to 2.0 0.50 0.05 0.1 Remainder 0.08 0.10 0.005 0.2 E Lead-rich 9.0 to 11.0 14.0 to 16.0 0.7 Remainder 0.05 0.6 0.005 0.1 0.10 0.005 0.2 PbSb15Sn10 F Lead-rich 5.0 to 7.0 9.0 to 11.0 0.7 Remainder 0.05 0.25 0.005 0.1 0.10 0.005 0.2 PbSb10Sn6 G Lead-rich 4.5
27、 to 6.5 14.0 to 17.0 0.7 Remainder 0.05 0.3 0.005 0.1 0.10 0.005 0.2 H Lead-rich 0.9 to 1.7 13.5 to 15.5 0.7 Remainder 0.02 0.8 to 1.2 0.005 0.1 0.10 0.005 0.2 PbSb15SnAs NOTESingle values denote the maximum permitted content.BS3332:1987 BSI 07-1999 Publications referred to BS 1400, Specification fo
28、r copper alloy ingots and copper alloy and high conductivity copper castings 1) . BS 1957, Presentation of numerical values (fineness of expression; rounding of numbers). BS 3338, Methods for the sampling and analysis of tin and tin alloys. BS 3338-8, Method for the determination of bismuth in ingot
29、 tin, tin-lead solders and white metal bearing alloys (photometric method). BS 3338-9, Method for the determination of arsenic in ingot tin, solders and white metal bearing alloys (photometric method). BS 3338-10, Method for the determination of iron in ingot tin, tin-lead solders and white metal be
30、aring alloys (photometric method). BS 3338-13, Method for the determination of antimony in solders and white metal bearing alloys (volumetric: potassium bromate method). BS 3338-14, Method for the sampling of white metal bearing alloy ingots. BS 3338-15, Method for the determination of copper and le
31、ad in white metal bearing alloys (electrodeposition method). BS 3338-16, Method for the determination of tin in white metal bearing alloys (nickel coil reduction method). BS 3338-17, Method for the determination of cadmium in solders and white metal bearing alloys (photometric method). BS 3338-18, M
32、ethod for the determination of aluminium in solders and white metal bearing alloys (photometric method). BS 3338-19, Method for the determination of zinc in solders and white metal bearing alloys (photometric method). BS 3338-20, Nickel in capping metal (photometric method). BS 5812, Materials for p
33、lain bearings 1) . ISO 4381, Plain bearings Lead and tin casting alloys for multilayer plain bearings. 1) Referred to in the foreword only.BS 3332:1987 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStanda
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