1、DEUTSCHE NORM September 1995 I I Ingot tin I EN610 English version of DIN EN 61 O I ICs 77.120.60 Descriptors: Tin, nonferrous metals, ingots. Zinn und Zinnlegierungen; Zinn in Masseln Supersedes DIN 1704, June 1973 edition. European Standard EN 610: 1995 has the status of a DIN Standard. A comma is
2、 used as the decimal marker. National foreword This standard has been prepared by CENTTC 220. The responsible German body involved in its preparation was the Normenausschu Nichteisenmetalle (Nonferrous Metals Standards Committee). Amendments DIN 1704, June 1973 edition, has been superseded by the sp
3、ecifications of EN 610. Previo us editions DIN 1704: 1925-04, 1940-02, 1973-06; DIN 1728: 1944-05. EN comprises 10 pages. !uth Verlag GmbH, Berlin, has the exclusive right of sale for German Standards(D1Pi-Normen). DIN EN 670 Enal. Price grow - -. 02.96 Sales NO. 11 06 EUROPEAN STANDARD NORME EUROPE
4、NNE EUROPAISCHE NORM EN 610 July 1995 ICs 77.120.60 Descriptors: Tin, nonferrous metals, ingots. English version Tin and tin alloys Ingot tin Etain et alliages dtain; tain en lingot Zinn und Zinnlegierungen; Zinn in Masseln This European Standard was approved by CEN on 1995-06-05. CEN members are bo
5、und to comply with the CENKENELEC Internal Regulations which stipu- late the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the
6、 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 a CEN member into its own language and notified to the Central Secretariat has the same statu
7、s 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, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comi
8、t Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 8 1995. Copyright reserved to all CEN members. Ref. No. EN 610:1995 E Page 2 EN 610:1995 Contents Foreword . 2 1 Scope . 3 2 Definitions . 3 3 Ordering information . . . . . . . . . . .
9、 . . . . 3 4 Requirements 4 5 Selection and preparation of samples for analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6 Analytical methods _ . . . . . . 5 7 Inspection documentation . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8
10、Marking and labelling . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Annex A (normative) Rounding rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Annex B (normative) Method for sampling a batch of in
11、gots for analysis . . . . . . . . . . . 8 Page Foreword This European Standard has been prepared by Technical Committee CEN/TC 220 Tin and tin alloys, the Secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identic
12、al text or by endorsement, and conflicting national standards withdrawn, by January 1996 at the latest. In accordance with CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ire
13、land, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 3 EN610:1995 1 scop. This draft European Standard specifies the requirements for the chemical composition, surface condition, sampling, analysis, inspection documentation and marking for five
14、grades of ingot tin. The grades of tin included in this draft European Standard are those which are traded internationally. 2 Dot initions 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
15、ingots produced from a single uniform melt. 2.3 bundle: Collection of ingots taken from one batch and secured by banding for the purposes of handling, shipment and storage. 3 Ordoring information The following information shall be supplied by the purchaser in the enquiry and/or order, to assist the
16、supplier in providing the correct material: a) the number of this European Standard (EN 610); b) the designation of the tin grade required (see table 1); c) the individual nominal mass of the ingots; d) e) whether a specific ingot shape is required (see 4.2); f) conformity is required (see clause 7)
17、; the total mass of ingots required; whether a certificate of analysis or a statement of g) the specific packaging requirements. Page 4 EN 610:1995 Tin grade designa- Sn AI As Bi Cd Cu Fe tion min. man max. max. ma. max. max. Sn 99,99 99,99 0,0005 0,0005 0,0001 0,0005 0,0005 0,0001 Sn 99,95 99,95 0,
18、0005 0,0040 0,0050 0,0005 0,005 0,0025 Sn 99,93 99,93 0,0005 0,004 0,005 0,0005 0,010 0,003 Sn 99,QO 9930 0,0010 0,030 0,010 0,0010 0,030 0,005 Sn 99,85 99,85 0,0010 0,030 0,030 0,0010 0,050 0,010 4 Roquirmments Total of all Pb Sb Zn impuri- ties max. man ma. rnax. 0,0040 0,0010 0,0005 0,010 0,040 0
19、,015 0,0005 0,050 0,040 0,040 0,0005 0,070 0,010 0,040 0,0010 0,100 0,050 0,050 0,0010 0,150 4.1 Chmmical 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 s
20、hall be rounded to the same number of decimal places as used in expressing the specified limit in table 1. rules are given in annex A. The rounding Page 5 EN 610:1995 4.2 Sapo of ingots The shape of the ingots shall be at the discretion of the supplier, unless a specific shape is agreed between the
21、purchaser and the supplier and is stated in the enquiry and/order see 3e)l. NOTE: The 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 When analysis
22、 is to be carried out to verify conformity of a batch of ingots with the composition requirements given in 4.1, the selection of the samples, and the preparation of the analysis samples, shall be in accordance with annex B. Smloction and proparation of srniplos for analysis 6 Analytical methods For
23、routine control purposes the samples selected and prepared in accordance with clause 5 shall be analyzed 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” for the analys
24、is of tin ingots, the analytical methods used shall be subject to agreement between the disputing parties and any independent arbitrator. I) in course of preparation. Page 6 EN 610:1995 7 Inspection documontation The supplier shall provide inspection documentation with each consignment of ingots. Th
25、e documentation shall be as requested by the purchaser in the enquiry and order see 3f)J, and shall be in accordance with either a) or b) as follows: a) each batch in the consignment; or a certificate giving the chemical analysis specific to b) order requirements. a statement of conformity of the co
26、nsignment with the NOTE: The statement of conformity does not necessarily relate to specific tests carried out on the consignment. 8 Harking and labelling 8.1 Ingots Every ingot shall be marked with the following information: a) producers name or mark; and b) batch identification. 8.2 Bundles Every
27、bundle shall have affixed a label giving all the following information: a) number of this European Standard (EN 610); b) tin grade designation (see table 1); c) producers name or mark; and d) batch identification. Page 7 EN 610:1995 Annu A (normativa) For the purposes of determining conformity with
28、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) if the figure immediately after the last f
29、igure to be retained is less than five, the last figure to be retained shall be kept unchanged; b) retained is equal to or greater than five, the last figure to be retained shall be increased by one. if the figure immediately after the last figure to be Page 8 EN 610:1995 Number of ingots in batch 1
30、 to 4 5 to 20 21 to 40 41 to 60 over 60 Annex B (normative) Number of sample ingots 1 2 4 6 10 % of ingots in batch Method for sampling 8 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
31、resulting sawings are combined. Analysis samples are obtained by splitting the aggregated sample. B.2 Haterials 8nd 8ppar8tus B.2.1 Steel wire brush 8.2.2 Soft bristle brush 8.2.3 Powered hacksaw, equipped with a steel blade for coarse cutting B.2.4 Large magnet B.2.5 Degreasing solvent B.2.6 Sample
32、 splitter, or equipment for coning and quartering B.3 Procedure Page 9 EN 610:1995 8.3.2 Preparation of sample ingots Ensure the sample ingots (B.3.1) are free of oil and grease. Clean the sample ingots by scratch brushing the surface, using the steel wire brush (B.2.1). Then use the soft brush (B.2
33、.2) to remove any loose or detached surface contaminants. B.3.3 Sawing th8 sample ingots Saw each sample ingot individually by the following procedure. Clamp the ingot in the vice of the hacksaw (B.2.3). Make three sawcuts through the complete cross-section of the ingot at sites one-quarter, two-qua
34、rters and three-quarters of the length L of the ingot, collecting all the resulting sawings (see figure B.l a). clean the sawings thoroughly in the degreasing solvent (B.2.5). Remove any free iron with the magnet (B.2.4). If any oil is likely to be present, NOTE 1: The two outer sawcuts should not b
35、e 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 to the centre-cut, such that the full cross-section of the ingot is sampled see figure B.lb) J. NOTE 2: Do not use lubrica
36、nt in making the sawcuts, except where experience shows it will not vitiate sampling. NOTE 3: If the ingots are of a size, or shape, which is such that the procedure described is not practicable, then an appropriate, systematic sawing procedure should be followed, which in cases of dispute should be
37、 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 sufficient to provide an aggregate analysis sample of minimum mass 100 g which is representative of the whole batch of
38、 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. Page 1 O EN 61 O : 1995 Sawcuts a) Sawcuts Sawcuts b) Sawcuts FigureB.l: Sawing the sample ingots B.3.4 Obtaining the 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.
