1、BRITISH STANDARD BS EN 610:1996 Tin and tin alloys Ingot tin The European StandardEN 610:1995 has the status of a British Standard ICS 77.120.60BSEN 610:1996 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was published underthe authority of the Standar
2、ds Board and comes intoeffect on 15 April 1996 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference NFE/27 Draft for comment 92/35560 DC ISBN 0 580 25353 8 Committees responsible for this British Standard The United Kingdom participation in the preparatio
3、n of this European Standard was entrusted to Technical Committee NFE/27, Tin and tin alloys, upon which the following bodies were represented: Association of British Pewter Craftsmen British Iron and Steel Producers Association Federation of the Electronics Industry ITRI Ltd. London Metal Exchange M
4、etal Packaging Manufacturers Association Solder Makers Association Amendments issued since publication Amd. No. Date CommentsBSEN 610:1996 BSI 07-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN610 3BSEN 610:1996 ii BSI 07-1999 National forewo
5、rd This British Standard has been prepared by Technical Committee NFE/27 and is the English language version of EN610:1995Tin and tin alloys Ingot tin, published by the European Committee for Standardization (CEN). It supsersedes BS3252:1986 which is withdrawn. The United Kingdom took an active part
6、 in the preparation of EN610:1995. 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 British Standard does not of itself confer immunity from legal obligations. Summar
7、y of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 7 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 cov
8、er.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 610 July 1995 ICS 77.120.60 Descriptors: Tin, ingots, designation, specification, chemical composition, grades: quality, sampling, marking English version Tin and tin alloys Ingot tin tain et alliages dtain tain en lingot Zinn und Zinnlegierung
9、en Zinn in Masseln This European Standard was approved by CEN on 1995-06-05. 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 national standard without any alteration. Up-to-date lists and bibli
10、ographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of
11、 a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,
12、Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 All rights of reproduction and communication in any form and by any means reserved in
13、all countries to CEN and its members. Ref. No. EN 610:1995 EEN 610:1995 BSI 07-1999 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC220, Tin and tin alloys, of which the Secretariat is held by BSI. This European Standard shall be given the status of a national standa
14、rd, either by publication of an identical text or by endorsement, at the latest by January1996, and conflicting national standards shall be withdrawn at the latest by January1996. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard
15、: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Definitions 3 3 Ordering information 3 4 Requirements 3 5 Selection and preparati
16、on of samples for analysis 3 6 Analytical methods 3 7 Inspection documentation 5 8 Marking and labelling 5 Annex A (normative) Rounding rules 6 Annex B (normative) Method for sampling a batch of ingots for analysis 6 Figure B.1 Sawing and sample ingots 7 Table 1 Chemical composition and grade design
17、ation of ingot tin 4 Table B.1 Sampling rate for batch of ingots 6EN 610:1995 BSI 07-1999 3 1 Scope This European Standard specifies the requirements for the chemical composition, surface condition, sampling, analysis, inspection documentation and marking for five grades of ingot tin. The grades of
18、tin included in this European Standard are those which are traded internationally. 2 Definitions For the purposes of this standard the following definitions apply. 2.1 ingot cast, unwrought product in a form suitable only for remelting 2.2 batch series of ingots produced from a single uniform melt 2
19、.3 bundle collection of ingots taken from one batch and secured by banding for the purposes of handling, shipment and storage 3 Ordering information The following information shall be supplied by the purchaser in the enquiry and/or order, to assist the supplier in providing the correct material: a)
20、the number of this European Standard (EN610); b) the designation of the tin grade required (seeTable 1); c) the individual nominal mass of the ingots; d) the total mass of ingots required; e) whether a specific ingot shape is required (see4.2); f) whether a certificate of analysis or a statement of
21、conformity is required (seeclause7); g) the specific packaging requirements. 4 Requirements 4.1 Chemical composition The chemical composition of the ingots shall conform to the requirements for the appropriate grade given in Table 1. In expressing the results for the analysis, the values obtained sh
22、all be rounded to the same number of decimal places as used in expressing the specified limit in Table 1. The rounding rules are given in Annex A. 4.2 Shape of ingots The shape of the ingots shall be at the discretion of the supplier, unless a specific shape is agreed between the purchaser and the s
23、upplier and is stated in the enquiry and/or order see3 e). NOTEThe ingot shape should be such that the bundle of ingots remains stable when the banding is removed. 4.3 Surface condition of ingots The surface of the ingots shall be clean and free of holes and pores. 5 Selection and preparation of sam
24、ples for analysis When analysis is to be carried out to verify conformity of a batch of ingots with the composition requirements given in4.1, the selection of the samples, and the preparation of the analysis samples, shall be in accordance with Annex B. 6 Analytical methods For routine control purpo
25、ses the samples selected and prepared in accordance with clause5 shall be analysed by the use of recognized chemical or instrumental analytical methods. In cases of dispute concerning the results of chemical analysis, until the publication of a European Standard 1)for the analysis of tin ingots, the
26、 analytical methods used shall be subject to agreement between the disputing parties and any independent arbitrator. 1) In course of preparation.EN 610:1995 4 BSI 07-1999 Table 1 Chemical composition and grade designation of ingot tin Composition in % (m/m) Tin grade designation Sn Al As Bi Cd Cu Fe
27、 Pb Sb Zn Total of all impurities min. max. max. max. max. max. max. max. max. max. max. Sn 99,99 Sn 99,95 Sn 99,93 Sn 99,90 Sn 99,85 99,99 99,95 99,93 99,90 99,85 0,0005 0,0005 0,0005 0,0010 0,0010 0,0005 0,0040 0,004 0,030 0,030 0,0001 0,0050 0,005 0,010 0,030 0,0005 0,0005 0,0005 0,0010 0,0010 0,
28、0005 0,005 0,010 0,030 0,050 0,0001 0,0025 0,003 0,005 0,010 0,0040 0,040 0,040 0,010 0,050 0,0010 0,015 0,040 0,040 0,050 0,0005 0,0005 0,0005 0,0010 0,0010 0,010 0,050 0,070 0,100 0,150EN 610:1995 BSI 07-1999 5 7 Inspection documentation The supplier shall provide inspection documentation with eac
29、h consignment of ingots. The documentation shall be as requested by the purchaser in the enquiry and order see3 f), and shall be in accordance with either a) or b) as follows: a) certificate giving the chemical analysis specific to each batch in the consignment; or b) a statement of conformity of th
30、e consignment with the order requirements. NOTEThe statement of conformity does not necessarily relate to specific tests carried out on the consignment. 8 Marking and labelling 8.1 Ingots Every ingot shall be marked with the following information: a) producers name or mark; and b) batch identificati
31、on. 8.2 Bundles Every bundle shall have affixed a label giving all the following information: a) number of this European Standard (EN610); b) tin grade designation (seeTable 1); c) producers name or mark; and d) batch identification.EN 610:1995 6 BSI 07-1999 Annex A (normative) Rounding rules For th
32、e purposes of determining conformity with compositional limits an observed value, or a calculated value, obtained from the analysis is rounded to the same number of decimal places as used in this European Standard in expressing the specified limit. The following rules shall be used for rounding: a)
33、if the figure immediately after the last figure to be retained is less than five, the last figure to be retained shall be kept unchanged; b) if the figure immediately after the last figure to be retained is equal to or greater than five, the last figure to be retained shall be increased by one. Anne
34、x B (normative) Method for sampling a batch of ingots for analysis B.1 Principle A number of ingots is randomly selected from the batch. Sawcuts are made systematically in the selected ingots and the resulting sawings are combined. Analysis samples are obtained by splitting the aggregated sample. B.
35、2 Materials and apparatus B.2.1 Steel wire brush B.2.2 Soft bristle brush B.2.3 Powered hacksaw, equipped with a steel blade for coarse cutting B.2.4 Large magnet B.2.5 Degreasing solvent B.2.6 Sample splitter, or equipment for coning and quartering B.3 Procedure B.3.1 Selection of sample ingots fro
36、m the batch According to the number of ingots in the batch, randomly select a number of sample ingots, in accordance with the ingot sampling rate given in Table B.1. Table B.1 Sampling rate for batch of ingots B.3.2 Preparation of sample ingots Ensure the sample ingots (B.3.1) are free of oil and gr
37、ease. Clean the sample ingots by scratch brushing the surface, using the steel wire brush (B.2.1). Then use the soft brush (B.2.2) to remove any loose or detached surface contaminants. B.3.3 Sawing the sample ingots Saw each sample ingot individually by the following procedure. Clamp the ingot in th
38、e vice of the hacksaw (B.2.3). Make three sawcuts through the complete cross-section of the ingot at sites one-quarter, two-quarters and three-quarters of the length L of the ingot, collecting all the resulting sawings seeFigure B.1a). If any oil is likely to be present, clean the sawings thoroughly
39、 in the degreasing solvent (B.2.5). Remove any free iron with the magnet (B.2.4). NOTE 1The two outer sawcuts should not be made through the end lugs of the ingot. If any sample ingot has end lugs which are longer than one-quarter the length of the ingot, the two outer sawcuts should be made closer
40、to the centre-cut, such that the full cross-section of the ingot is sampled seeFigure B.1b). NOTE 2Do not use lubricant in making the sawcuts, except where experience shows it will not vitiate sampling. NOTE 3If the ingots are of a size, or shape, which is such that the procedure described is not pr
41、acticable, then an appropriate, systematic sawing procedure should be followed, which in cases of dispute should be agreed between the disputing parties. In this procedure the pattern of sawcuts should be made through the full cross-section of each sample ingot. The sawings so produced should be suf
42、ficient to provide an aggregate analysis sample of minimum mass100g which is representative of the whole batch of ingots. Repeat these procedures for each of the sample ingots. Combine and mix all the sawings, to give a sample of sawings representative of the whole batch of ingots. B.3.4 Obtaining t
43、he sample for analysis Reduce the aggregated sample obtained in B.3.3, by means of the sample splitter or by coning and quartering (B.2.6), to obtain one, or more, representative samples of suitable size for analysis. Number of ingots in batch Number of sample ingots 1 to 4 5 to 20 21 to 40 41 to 60
44、 over 60 1 2 4 6 10 % of ingots in batchEN 610:1995 BSI 07-1999 7 Figure B.1 Sawing the sample ingotsBS EN 610:1996 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on stan
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