BS EN 611-1-1996 Tin and tin alloys — Pewter and pewterware — Part 1 Pewter.pdf

BRITISH STANDARD BS EN 611-1:1996 Tin and tin alloys Pewter and pewterware Part 1: Pewter The European Standard EN 611-1:1995 has the status of a British Standard ICS 77.120.60 BS EN 611-1:1996 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1996 © BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference NFE/27 Draft for comment 92/35561 DC ISBN 0 580 25348 1 Committees responsible for this British Standard The preparation of this British 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 Metal Packaging Manufacturers Association Solder Makers Association Amendments issued since publication Amd. No.DateComments BS EN 611-1:1996 © BSI 08-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 611-13 List of referencesInside back cover BS EN 611-1:1996 ii © BSI 08-1999 National foreword This British Standard has been prepared by Technical Committee NFE/27 and is the English language version of EN 611-1:1995 Tin and tin alloys Pewter and pewterware Part 1: Pewter, published by the European Committee for Standardization (CEN). It partially supersedes BS 5140:1988, which will be withdrawn upon publication of BS EN 611-21). The United Kingdom took an active part in the preparation of EN 611-1:1995. 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. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 8, an inside back cover 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 the inside front cover. 1)In preparation. Cross-references Publication referred toCorresponding British Standard EN 610:1995BS EN 610:1996 Tin and tin alloys Ingot tin EN 29453:1994BS EN 29453:1994 Soft solder alloys Chemical compositions and forms ? EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 611-1 July 1995 ICS 77.120.60 Descriptors: Tin, tin alloys, ingots, sheets, manufacturing, works of art, specifications, chemical composition, sampling, marking English version Tin and tin alloys Pewter and pewterware Part 1: Pewter Étain et alliages d étain Étain pour la fabrication d objets en étain et objets en étain Partie 1: Étain pour la fabrication d objets en étain Zinn und Zinnlegierungen Zinnlegierungen und Zinngerät Teil 1: Zinnlegierungen 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 bibliographical 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 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, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für 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 all countries to CEN and its members Ref. No. EN 611-1:1995 E ? EN 611-1:1995 © BSI 08-1999 2 Foreword This European Standard has been prepared by the Technical Committee CEN/TC 220, Tin and tin alloys, of which the secretariat is held by BSI. This European Standard consists of two Parts, of which Part 1 specifies the requirements for pewter alloys. The compositions of pewter alloys in Part 1 are based largely on proposals from the European Pewter Union. Part 2 of EN 611 will specify requirements for pewterware, made from the pewter alloys specified in Part 1. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 1996, and conflicting national standards shall be withdrawn at the latest by January 1996. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 4Ordering information3 5Requirements4 6Selection and preparation of samples for analysis4 7Analytical methods4 8Inspection documentation4 9Marking and labelling of ingots, sheets and blanks4 Annex A (normative) Rounding rules5 Annex B (normative) Method for sampling ingots, sheets and blanks for analysis5 Annex C (normative) Solders in EN 29453 referred to in 5.26 Table 1 Chemical composition of pewter alloys3 Table B.1 Sampling rate for batch of ingots5 Table C.1 Chemical composition of EN 29453 solders7 ? EN 611-1:1995 © BSI 08-19993 1 Scope This Part of EN 611 specifies the chemical composition of pewter alloys to be used for the manufacture of pewterware. The specified compositions apply to the alloy in the form of ingots, sheets and blanks. This Part of EN 611 also specifies the chemical composition of the solders to be used for the joining of: a) pewterware which may reasonably be expected to come into contact with foodstuffs; and b) pewterware for other purposes. NOTEThe requirements for pewterware and the procedures for sampling pewterware are specified in prEN 611-2. 2 Normative references This Part of this European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 610, Tin and tin alloys Ingot tin. EN 29453, Soft solder alloys Chemical compositions and forms. 3 Definitions For the purposes of this standard the following definitions apply. 3.1 ingot cast, unwrought product in a form suitable only for remelting 3.2 sheet rolled flat product supplied in straight lengths 3.3 blank shape stamped, or cut, from a sheet 3.4 batch series of ingots, sheets or blanks produced from a single uniform melt 4 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) the number of this Part of this European Standard (EN 611-1); b) the pewter alloy required (see Table 1); c) whether ingots, sheets or blanks are required; d) if sheets or blanks are required, their nominal dimensions; e) the quantity required; Table 1 Chemical composition of pewter alloys Composition in % (m/m) Pewter alloy number SnElementAgBiCdCuPbSb Total other elements 1Remainder, but tin + silver not less than 91 % min. max. 4,0a 0,5 0,05 1,0 2,5 0,25 5,0 7,0 0,2 2Remainder, but not less than 94 % min. max. 0,05 0,5 0,05 0,5 2,5 0,25 3,0 5,0 0,2 3Remainder, but not less than 91,5 % min. max. 0,05 0,5 0,05 0,25 2,0 0,25 4,5 8,0 0,2 4Remainder, but not less than 94 % min. max. 0,05 0,5 0,05 0,05 0,25 3,0 6,0 0,2 5Remainder, but not less than 92,5 % min. max. 0,05 0,5 0,05 0,05 0,25 6,5 7,5 0,2 6Remaindermin. max. 0,05 0,5 0,05 1,5 0,25 2,5 0,2 aFor alloy 1, the silver range required, up to a maximum of 4,0 %, Ag, shall be agreed between the purchaser and the supplier, and stated in the order see 4 g). ? EN 611-1:1995 4 © BSI 08-1999 f) whether a certificate of analysis or a statement of conformity is required (see clause 8); g) for alloy 1, the agreed range for the silver content (see Table 1); h) the specific packaging requirements. 5 Requirements 5.1 Chemical composition of pewter alloys The chemical composition of the pewter alloys in the form of ingots, sheets or blanks, shall conform to the requirements for the appropriate alloy given in Table 1 when determined on samples selected in accordance with clause 6. In expressing the results for the analysis, the values obtained shall be rounded to the same number of decimal places as used in expressing the specified limit given in Table 1. The rounding rules are given in Annex A. Methods for sampling a batch for analysis are given in Annex B. 5.2 Chemical composition of solders for joining pewterware For those cases where the soldered joint may reasonably be expected to come into contact with foodstuffs, the solder used for joining the component parts of the pewterware shall contain not more than 0,25 % lead and 0,05 % cadmium. Examples of solders which meet this requirement are as follows: a) one of the alloys designated 1 to 6 in Table 1 of this Part of this European Standard; or b) alloy No. 21 in EN 29453 (see Annex C); or c) tin conforming to any of the grades specified in EN 610. NOTEIt is recommended that soldered joints which may reasonably be expected not to come into contact with foodstuffs should be made using solder which conforms to a), b), c) of this subclause, or to alloy No. 11 or alloy No. 12 in EN 29453 (see Annex C). 6 Selection and preparation of samples for analysis When analysis is to be carried out to verify conformity of a batch of ingots, sheets or blanks with the composition requirements of this European Standard, the selection of the samples, and the preparation of the analysis samples, shall be in accordance with Annex B. 7 Analytical methods For routine control purposes, the samples selected and prepared in accordance with clause 6 shall be analysed by the use of recognized chemical or instrumental analytical methods. In cases of dispute concerning the results of chemical analysis of pewter ingots, sheets or blanks, until the publication of European Standards2) for the analysis of pewter, the analytical methods to be used shall be subject to agreement between the disputing parties and any independent arbitrator. 8 Inspection documentation The supplier shall provide inspection documentation with each consignment of ingots, sheets or blanks. The documentation shall be as requested by the purchaser in the enquiry and/or order see 4 f), and shall be in accordance with either a) or b) as follows: a) a certificate giving the chemical analysis specific to each batch in the consignment, based on sample(s) taken from the melt from which the batch was produced; or b) a statement of conformity of the consignment with the order requirements. NOTEThe statement of conformity does not necessarily relate to specific tests carried out on the consignment. 9 Marking and labelling of ingots, sheets and blanks 9.1 Ingots All ingots, or bundles of ingots, shall be marked with all the following information: a) number of this Part of this European Standard (EN 611-1); b) pewter alloy number (see Table 1); c) producer s name or mark; and d) batch identification. 9.2 Sheets and blanks Each packaging unit of sheets and/or blanks shall have affixed a label giving the following information: a) number of this Part of this European Standard (EN 611-1); b) pewter alloy number (see Table 1); c) producers name or mark; and d) batch identification. 2)In course of preparation ? EN 611-1:1995 © BSI 08-19995 Annex A (normative) Rounding rules For the 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) 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. Annex B (normative) Method for sampling ingots, sheets and blanks for analysis B.1 Sampling of ingots B.1.1 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.1.2 Materials and apparatus B.1.2.1 Steel wire brush. B.1.2.2 Soft bristle brush. B.1.2.3 Powered hacksaw, equipped with a steel blade for coarse cutting. B.1.2.4 Large magnet. B.1.2.5 Degreasing solvent. B.1.2.6 Sample splitter, or equipment for coning and quartering. B.1.3 Procedure B.1.3.1 Selection of sample ingots from 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.1.3.2 Preparation of sample ingots Ensure the sample ingots (B.1.3.1) are free of oil and grease. Clean the sample ingots by scratch brushing the surface, using the steel wire brush (B.1.2.1). Then use the soft brush (B.1.2.2) to remove any loose surface contaminants. B.1.3.3 Sawing the sample ingots Cut off, by sawing using the hacksaw (B.1.2.3), a quarter of the length of each sample ingot (B.1.3.2). NOTEThe sawcut should not be made through the end lug of the ingot. If any sample ingot has end lugs which are longer than one-quarter the length of the ingot, the cut should be made closer to the centre of the length of the ingot, such that the full cross-section of the ingot is sampled. Collect the sawings from each sample ingot. Aggregate and mix the sawings and remove any free iron with a magnet (B.1.2.4). B.1.3.4 Obtaining the analysis sample Reduce the aggregated sample obtained in B.1.3.3 by means of the sample splitter or by coning and quartering (B.1.2.6