DIN EN 611- 1

DEUTSCHE NORM September 199 I I

Pewter and pewterware Pewter

English version of DIN EN 61 1-1

I DIN -

ICS 77.120.60

Descriptors: Tin, pewter, nonferrous metals.

Zinn und Zinnlegierungen; Zinnlegierungen und Zinngerat; Zinnlegierungen

Supersedes DIN 1781 0, January 1980 edition.

European Standard EN 611-1: 1995 has the status of a DIN Standard.

A comma is used as the decimal marker.

National foreword This standard has been prepared by CEN/TC 220. The responsible German body involved in its preparation was the NormenausschuB Nichteisenmetalle (Nonferrous Metals Standards Committee).

Amendments DIN 17810, January 1980 edition, has been superseded by the specifications of EN 61 1-1.

Previous editions DIN 17810: 1974-06, 1980-01.

EN comprises 11 pages.

leuth vertag GmbH, Berlln, has the exclusive rlgnt of sale for German Standards(DIN-No~en). DIN EN 61 1-7 Engl. Price group 2.96 Sales No. 111

EUROPEAN STANDARD NORME EUROPEENNE EUROPAISCHE NORM

EN 61 1-1

July 1995

ICS 77.120.60

Descriptors: Tin, pewter, nonferrous metals.

English version

Tin and tin alloys

Pewter and pewterware Part 1: Pewter

Etain et alliages d'etain; Btain pour la Zinn und Zinnlegierungen; Zinnlegierun- fabrication d'objets en etain et objets en gen und Zinngerat. Teil 1: Zlnnlegierun- etain. Partiel: Etain pour la fabrication !3en d'objets en etain

This European Standard was approved by CEN on 1995-06-05. CEN members are bound to comply with the CENlCENELEC 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 blbliographical 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 officlal 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

Comite Europeen de Normalisation Europaisches Komitee fiir Normung

Central Secretariat: r u e de Stassar t 36, 8-1050 Brusse ls

O 1995. Copyright r e s e ~ e d to all CEN members. Ref. No. EN 611-1 :I995 E

Page 2 EN 611-1:1995

Contents Page

foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . 3

3 Definitions ............................................................. 3 4 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

5 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6 Selection and preparation of samples for analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

7 Analytical methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

8 Inspection documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 9 Marking and labelling of ingots, sheets and blanks . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Annex A (normative) Rounding rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Annex B (normative) Method for sampling ingots, sheets and blanks for analysis . . . 8

Annex C (normative) Solders to EN 29 453 referred to in 5.2 . . . . . . . . . . . . . . . . . . . . . 10

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 standard consists of two Parts, of which Part 1 specifies the requirements for pewter alloys. The composition of pewter alloys as in Part 1 is based largely on proposals from the European Pewter Union. Part 2 of EN 61 1 will specify requirements for pewterware, made from the pewter alloys specified in Bart 1. This European Standard shall be given the status of a national standard, either by publ~cation of an ident~cal text or by endorsement, and conflicting national standards withdrawn, by January 199E at the latest. In accordance with the CENlGENELEC 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 United Kingdom.

Page 3 EN 611-1 ~ 1 9 9 5

This Part of EN 611 specifies the chemical composition of pewter alloys to be used tor the manufacture of pewterware, The specified compositions apply to the alloy in the form of ingots, sheets and blanks.

This Part of prEN 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.

NOTE: The requirements for pewterware and the procedures for sampling pewterware are specified in prEN 611-2.

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.

Page 4 EN 611-1 :I995

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;

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, s h e e t s or blanks, shall conform to t h e requirements for t h e 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.

Page 5 EN 611-1 :I995

5.2 ch.nic.1 ooaposition of aolders f o r joining pewtarware

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 , 2 5 % lead and 0 , 0 5 O 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 6101

NOTE: It is recommended that soldered joints which may reasonably be expected not t~ 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).

Tabla 1: C h u i u l composition of pevtmr alloys

-

Pevtar alloy nunbar

1

2

3

4

5

6

" For alloy 1 , the s i lver range required, up t o a maximum of 4 . 0 % A g , s h a l l be agreed between t h e purchaser and the suppl ier . and stated i n the order [see 4 g)].

8n

Remainder, but t i n + s i l v e r not less than 91 Z

Remainder, but not less than 94 %

Remainder, but not less than 9 1 . 5 ?

Remainder, but not less than 94 t

Remainder , but not less than 9 2 , s %

Remainder

Composition i n Z (mfm)

min.

max.

min.

max . min.

m i i ~ .

- 0,OI - 0 , 0 5

0 , 0 5

- 0 , s -

0 . 5 - 0 . 5

- 0,OS - 0 , 0 5 - 0,OS

- 0,OS - 0 ,05 - 1 , 5

- 0 ,25

0 , 2 5

- 0 ,25

3 , o

6 , O

6 , 5

7 , s

-

2 . 5

- 0 1 2 - 0 1 2

- o f 2

Page 6 EN 611-1 ;I995

6 Belmction and preparation of suaplos for analysi~

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 8.

7 Analytical methods

For routine control purposes, the samples selected and prepared in accordance with clause 6 shall be analyzed 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 standards1) 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 Inspaction 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) 1, 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.

NOTE: The statement of conformity does not necessarily relate to specific tests carried out on the consignment.

l) In course of preparation.

Page 7 EN 611-1 :I995

9 Marking and 18belling of ingots, shaats and blanks

9.1 Ingots

All ingots, or bundles of ingots, shal l 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) producerts name or mark; and

d) batch identification. 9.2 Bhoots and blanks

Each packaging unit of sheets and/or blanks shall have affixed a label g i v i n g 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.

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) i f 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.

Page 8 EN 611-1:1995

Method for sampling ingots, sheets and blanks for analysis

B . l sampling of ingots

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 b r i s t l e brush

8.1.2.3 Powered hacksaw, equipped with a steel blade For coarse cutting

B .I. 2.4 Large magnet

B.1.2.5 Degreasing solvent

B . 1 . 2 . 6 Sample splitter, or equipment for coning and quartering

8.1.3.1 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 t h e ingot sampling rate given in table B.1.

Table 8.1: Sampling rate for batch of ingots

Number of ingots in batch

1 to 4

5 to 20

2 1 t o 40

41 t o 60

over 60

"I

Number of sample ingots

1

2

4

6

10 % of ingots in batch

Page 9 EN 611-1 :I995

8.1.3.2 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 (8.1.2.1). Then use the soft brush (B.1.2.2) to remove any loose surface contaminants.

8.1.3.3 Sawing the sample ingots

cut off, by sawing using the hacksaw (B.1.2.3), a quarter of the length of each sample ingot (8.1.3.2 ) .

NOTE: The 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 ion with a magnet ( B . 1 . 2 . 4 ) .

8 . 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 ) , to obtain one, or more, representative samples of suitable size for analysis.

8.2 sampling of shoots and blanks

8.2.1 Principle

Small pieces are cut from a number of s h e e t s or blanks i n the batch. The pieces are aggregated, melted and cast in a chill mould. Sawings, drillings or millings are taken from the resulting casting, to produce the analysis sample.

B.2.2 Matarials and apparatus

In addition to small-scale facilities for melting and casting pewter alloys, the following are required:

B.2.2.1 Shears, or cutter, to obtain small pieces from sheets or blanks

B.2.2.2 Scales, capable of weighing up t o 200 g i n 1 g divisions.

B.2.2.3 Saw, drill or milling machine

B.2.2.4 Hand magnet

Page 10 EN 611-1 :I995

B . 2 . 3 . 1 For sheets, and for blanks of mass over 50 g

Randomly select four sheets or blanks from the batch. From each of the s e l e c t e d sheets or blanks use the shears or cutter ( B . 2 . 2 . 1 ) to cut, from random locations, approximately 50 g of small pieces. Aggregate the small pieces.

Randomly select a number of whole blanks to give a combined mass of approximately 200 g.

B.2.3.3 obtaining the analysis sample

Melt the aggregated small pieces (B.2.3.1), or the selected blanks (B.2.3.2) in a clean iron or fireclay crucible. Stir well and chill-cast the melt into a clean iron or steel mould. Take sawings, drillings or millings from the resulting casting. Remove any free iron with a magnet ( 8 .2 .2 .4 ) and mix thoroughly to produce the analysis sample.

Table C.l gives the chemical composition requirements for solders with the alloy numbers 21, 11 and 12, referred to in clause 5.2 of this European Standard. The details have been extracted from EN 29453.

Table C.l: Chemical composition of EN 29453 solders

l ) In alloy 21, the sum of all impurities (i.e.elements other than Bi and Sn) shall be 0,2% maximum.

*) In alloy 21, In and Ag each shall be 0.05% maximum.

Melting or solidus/ liquidus temperature,

in "C

1 83

183 to 190

138

Alloy number

1 1

12

21

Chemical composition, as percentages by mass

Alloy designation

S-Sn63Pb37Sb

S-SnGOPb40Sb

S-Bi57Sn43

I Element

Minimum Maximum

Minimum Maximum

Minimum Maximum

Pb

Minim~urn

Minimum

- 0,05

SN

62,5 63,5

59,5 60,5

42,5 43,5

Sb

0,12 0,50

0,12 0,50

- 0,lO

Cd

- 0,002

- 0,002

- 0,002

At

- 0,001

- 0,001

- 0,001

Zn

- 0,001

- 0,001

- 0,001

Bi

- 0,lO

- 0,lO

Min.

As

- 0,03

- 0,03

- 0,03

Fe

- 0,02

- 0,02

- 0,02

Cu

- 0,05

- 0,05

- 0,lO

Total, except

Sb. Bi, Cu

- 0,08

- 0,08

- 0,2 I) , ')