din-en1676_aluminium ingots for remelting spec.pdf

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Aluminium and aluminium alloys

Alloyed aluminium ingots for remeltingSpecifications

English version of DIN EN 1676

ICs 77.1 50.1 O

Descriptors: Aluminium, ingots.

Aluminium und Aluminiumlegierungen - Legiertes Aluminium in Masseln - Spezifikationen

DINN 1676

Supersedes DIN 1725-5,February 1986 edition.

European Standard EN 1676: 1996 has the status of a DIN Standard .

A comma is used as the decimal marker.

National foreword

This standard has been prepared by CENTTC132.

The responsible German body involved in its preparation was the Normenausschu Nichteisenmetalle (Nonferrous MetalsStandards Committee), Technical Committee Httenalurninium.

AmendmentsDIN 1725-5, February 1986 edition, has been superseded by the specifications of EN 1676.

Previous editions

EN comprises 9 pages.

> No part of this standard may be reproduced without th e prior pe rmission of Ref. No. DIN EN 1 676: 1997-02)IN Deutsches nstitut fr Normu ng e.V., Berl in.leuth Verlag GmbH, Berlin, has the exclusive right of sale for German Standards DIN-Normen).

English price group O7 Sales No. 7 1 O710.97

right Deutsches Institut Fur Normung E.V.ded by IHS under license with DIN

Not for Resaleproduction or networking permitted without license from IHS

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right Deutsches Institut Fur Normung E.V.ded by IHS under license with DINNot for Resaleproduction or networking permitted without license from IHS

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EUROPEAN STAN DA R DN O R M E EUROPENNEEUROPISCHE N O R M

EN 1676

November 1996

ICs 77.150.10

Descrip tors: Aluminium, ingots.

English version

Aluminium and aluminium alloysAlloyed ingots for remelting

Specifications

Aluminium et alliages daluminium - Aluminium und Aluminiumlegierungen -Lingots pour refusion en aluminium alli -Spcifications Spezifikationen

Legiertes Aluminium in Masseln -

This European Standard was approved by CEN on 1996-1 0-25.CEN members are bound to comply with the CEWCENELEC Internal Regulations whichstipulate the conditions for giving this European Standard the status of a national standardwithout any alteration.Up-to-date lists and bibliographical references concerning such national standards may beobtained on application to the Central Secretariat or to any CEN member.The European Standards exist in three officia l versions (English, French, German). A version inany other language made by translation under the responsibility of a CEN member into i ts ownlanguage and noti fied 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 the United Kingdom.

C E N

European Committee for StandardizationComit Europen d e NormalisationEuropisches Komitee fr Normung

Central Secretariat: rue de Stassart 36, B-1050 Brussels

O 1996. CEN - All rights of exploitation in any form and by any meansreserved worldwide for CEN national members.

Ref. No. EN 1676: 1996 E


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Page 2EN 1676: 1996

Contents

Foreword ............................................................................................................................... 21 Scope ...................................................................................................................... 32 Normative references ............................................................................................. 34 Orders or tenders

.............._..._............................._..................................................5 Requirements . .. . 46 Produc t inspection and testing methods .............................................................. 57 Inspection documents ........................................_................................................... 68 Marking of products ..............._...................................................__..................._......9 Packaging .................................... . ........... .............. ........ ............... ............. ...... 710 Delivery documents .................................................I..............................................11 Complaints ............................................................................................................... 7

Foreword

This European Standard has been prepared by Technical Committee CENTTC 132 "Aluminium

and aluminium alloys", the secretariat of which is held by AFNOR.This European Standard shall be given the status of a national standard, either by publication ofan identical text or by endorsement, at the latest by May 1997, and conflicting national standardsshall be withdrawn at the latest by May 1997.

Within its programme of work, Technical Commitee CENTC 132 entrusted CENTTC 132/WG 1"Liquid metal, unalloyed and alloyed ingots" to prepare the following standard:

prEN 1676 Aluminium and aluminium alloys - Alloyed ingots fo r remelting -Specifications.

According to the CENEENELEC Internal Regulations, the national standards organizations of thefollowing 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.



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Page 3EN 1676 : 1996

1 Scope

This European standard defines the requirements for grades of alloyed aluminium ingotsintended for remelting.

It specifies the classifications and designations applicable to these grades, the conditions inwhich they are produced, their properties and the marks by which they are identified.

2 Normative references

This European Standard incorporates by dated and undated reference, provisions from otherpublications. These normative references are cited at the appropriate places in the text and thepublications are listed hereafter. For dated references, subsequent amendments to or revisions ofany of these publications apply to this European Standard only when incorporated in it byamendment or revision. For undated references, the latest edition of the publication referred toapplies.

EN 1780-1 Aluminium and aluminium alloys - Designation of unalloyed and alloyedaluminium ingots for remelting, master alloys and castings - Part 1 :Numerical designation system

EN 1780-2 Aluminium and aluminium alloys - Designation of unalloyed and alloyedaluminium ingots for remelting, master alloys and castings - Part 2 :Chemical symbol based designation system

E N 1780-3 Aluminium and aluminium alloys - Designation of unalloyed and alloyedaluminium ingots for remelting, master alloys and castings - Pari 3 :Writing rules for chemical composition

EN I S 0 9000-1 Quality management and quality assurance standards - Fart 1 : Guidelinesfor selection and use (IS0 9000-1:1994)

3 Definitions

For the purposes of this standard, the following definitions apply :

3.1 alloy : Metallic substance of a mixture of the basic metallic element (the elementpredominating by mass) and other elements such as alloying elements and impurities.

3.2 alloying element : Metallic or non-metallic element intentionally added to, or naturallycontained by, a basic metal and the amount of which is controlled within specific upper and lower

limits for the purpose of giving that metal certain special properties.

3.3

metal and for which no lower limit is specified.impurity : Metallic or non-metallic element present but which is not intentionally added to a

3.4 casting alloy : Alloy primarily intended for the production of castings.


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Page 4EN 1676: 1996

3.5processed, as appropriate, to adjust the chemical composition and to control certain metallic ornon-metallic impurities.

ingot for remelting : Metal cast into a form suitable for remelting which has been

3.6mould.

casting : General term for products at or near finished shape, formed by solidification in a

3.7treatment in the furnace before the casting operation.

melt : Quantity of liquid metal that has simultaneously undergone the same preparatory

4 Orders or tenders

The order or tender shall define the product required and shall contain the following information :

a) designation of the aluminium alloy according to this European Standard (o r the purchasercode after agreement between the supplier and the purchaser) ;

b ) form of the product ;

c) quantity :

- mass (in metric tonnes) ;

- tolerance quantity if required ;

d) any requirements for Certificates of Conformity, test and/or analysis reports or inspectioncertificat es ;

e) any additional requirements agreed between the supplier and the purchaser, such asmetallurgical structure, samples, delivery details, etc.

5 Requirements

5.1 Produc tion and manufacturing processes

Unless otherwise specified in the order, the production and manufacturing processes shall be leftto the discretion of the producer.

Unless it is explicitly stated in the order, no obligation shall be placed on the producer to use thesame processes for subsequent and similar orders. However, the supplier should inform thepurchaser of any change which may affect the quality of the ingots or the final products.

5.2 Quality control

The supplier shall be responsible for carrying out all inspection and tests required by the relevantEuropean Standard and/or the particular specification, prior to shipment of the product. If thepurchaser wishes to inspect the product at the supplier's works, h e shall stipulate this at the timeof placing the order.


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Page 5EN 1676 : 1996

5.3 Chemical composition

Each grade of alloyed aluminium ingot for remelting shall be in accordance with the designationsand chemical composition specified in Table 1,

The writing rules for designations and chemical compositions, as specified in EN 1780-1,EN 1780-2 and EN 1780-3, shall be applied.

If the purchaser requires content limits for elements not specified in this standard, these limitsshall be stated on the order, after agreement between supplier and purchaser.

5.4 Freedom from defects

To a standard agreed between supplier and purchaser, the ingots shall be reasonably free from:

a ) visible defects such as grease, dirt, products of corrosion, dross or any other foreign bodiesincluding paint apart from that which is approved for marking purposes ;

b) metallic or non-metallic inclusions ;

c) gas porosity.

The ingots can have shrinkage holes or cracks which can retain water. They shall therefore bethoroughly dried and preheated before coming in contact with liquid metal to avoid the risk of aviolent explosion.

5.5 Form of products

There are several possible shapes of ingots, e. g. :

- trapezoidal which can be stacked. This type of ingot may have one or more notches toenable it to be divided into pieces if required ;

- continously cast material ;

- T, U, sow etc shape

The dimensions and tolerances on dimensions of the ingots and bundles and the variations onthe units masses shall be agreed between supplier and purchaser at the time of ordering.

6 Product inspection and testing methods

6.1 Analysis of chemical compositionSampling procedures and analytical test shall be carried out in accordance with quality assuranceprocedures (see EN IS0 9000-1). The results shall be traceable to reference samples. Thecapability of the analytical procedures shall be verified.


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Page 6EN 1676: 1996

The melt shall be clearly identified with a traceable number. The shape of the samples and thesampling conditions for chemical analysis shall be so designed that they are representative of themelt being cast. The analytical samples shall be taken during the cast, from the metal distributionsystem. A t least, two samples shall be taken, one from the beginning and one from the end ofevery melt.

When analysed by emission spectrometry, each analytical sample shall be suitabily machinedand, when analysed by emission spectrometry, shall be analysed at least twice. The analysisresult shall be the arithmetic mean of the individual results.

Each sample shall meet the specified composition limits. The analysis of the melt shall be thearithmetic mean of all the samples taken from this melt.

The producer shall determine and periodically check the analytical accuracy of each elementanalysed. He shall be able to demonstrate the validity of the whole test procedure, includingsampling, sample preparation and measurement.

The analytical methods are at the discretion of the producer who shall use methods accepted atthe European or international levels.

6.2 Chemical composition limits

The composition in Table 1 is given in percentage by mass. Figure are a maximum unless aminimum is also shown.

7 Inspection documents

The producer shall supply the grade of aluminium alloy quoted on the order. By agreementbetween the supplier and the purchaser or when specified on the order, the consignment shall beaccompanied by a certificate listing the results of the analysis of the chemical elements noted inTable 1 and any other element which may have been requested in advance.

8 Marking of produc ts

Unless otherwise indicated on the order, each unit (Le. bundle of ingots, T-bar or sow) shall bearone or more marks which will show the following :

- the producer identification ;

- the alloy designation ;

- the melt number ;

- the mass of the unit.

The method of marking is left to the discretion of the supplier, but it shall be sufficiently wea therproof and shall not be a source of contamination.

It is recommended that each unit, carries a warning about the risk of explosion when getting incontact with liquid metal without first being properly dried (see 5.4).


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Page 7EN 1676 : 1996

9 Packaging

Small ingots shall be gathered together in bundles, the mass of which should not generallyexceed one tonne.

Each bundle shall be made from only one melt.

The packaging shall be sufficiently strong for the bundle to be handled without breakage.

1O Delivery documents

The delivery documents shall accompany the delivery and include:

- the producer identfication ;

- the order number ;

- the alloy designation ;

- the melt number(s) ;

- if required, the results of chemical analysis for all elements for which specific limits are shownin Table 1, in the same sequence as given in the table ;

- the mass of each unit and the total mass delivered

- the form of the product.

11 Complaints

Chemical and physical defects can give rise to complaints if they affect the processing or the enduse of the relevant finished product.

The purchaser shall enable the supplier to check the grounds of the complaint.

He shall provide at least one of the following :

- a piece of relevant ingot, with its complete identification ;

- a specimen of a defective semi finshed or final product which has been fabricated from therelevant ingot, together with information which gives evidence of a relationship between thedefect and the ingot, and details about the fabrications conditions and intermediate controls.

It should be noted that the direct spectrographic analysis of ingot slices can give rise toinaccuracy due to segregation. The sampling and analysis method shall be agreed betweensupplier and purchaser.

In case of dispute concerning conformity with the requirements of the present standard orspecification stated on the order, examinations and tests shall b e performed by a refereelaboratory chosen by mutual agreement between supplier and purchaser. The arbitrator'sdecision should be final.


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Page 8EN 1676: 1996

right Deutsches Institut Fur Normung E.V.

ded by IHS under license with DINNot for Resaleproduction or networking permitted without license from IHS

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Page 9EN 1676 : 1996

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