oSIST prEN 12392:2008
(Main)Aluminium and aluminium alloys - Wrought and cast materials - Special requirements for materials intended for pressure purpose
Aluminium and aluminium alloys - Wrought and cast materials - Special requirements for materials intended for pressure purpose
This European Standard specifies particular requirements and testing procedures applicable to wrought aluminium and aluminium alloys intended for the production of pressure equipment. It includes: - the products forms, grades and tempers of wrought aluminium and aluminium alloys which may be used for such application, together with their permissible working temperature range; - the technical conditions for inspection and delivery, mechanical property limits and tolerance on form and dimensions by reference to the applicable European Standard for wrought aluminum and aluminium and aluminium alloys; - additional requirements specific to pressure vessel application It applies to hot-rolled or cold-rolled sheet, strip, plate, circle, extruded or extruded and cold drawn rod/bar and tube, extruded open and hollow sections, and forgings.
Aluminium und Aluminiumlegierungen - Knet- und Gusswerkstoffe - Besondere Anforderungen an Werkstoffe für die Fertigung von Druckgeräten
Diese Europäische Norm legt die Werkstoffanforderungen und Prüfverfahren für Knet und Gussaluminium sowie Aluminium Knet und Gusslegierungen fest, die zur Fertigung von Druckgeräten vorgesehen sind.
Diese Europäische Norm umfasst:
die Erzeugnisformen, Sorten und Werkstoffzustände von Knet und Gussaluminium sowie Aluminium Knet und Gusslegierungen, die für diese Anwendung eingesetzt werden dürfen, zusammen mit Daten für Knet und Gusslegierungen über ihre zulässigen Arbeitstemperaturbereiche;
die zulässigen Legierungen/Werkstoffzustände, die in den Tabellen A.1 und A.2 für Knetlegierungen und in den Tabellen B.1 und B.2 für Gussstücke angegeben werden;
die Technischen Lieferbedingungen, die Grenzwerte der mechanischen Eigenschaften sowie die Grenzabmaße und Formtoleranzen mit Verweisung auf die zutreffenden Europäischen Normen für Knet und Gussaluminium sowie Aluminium Knet und Gusslegierungen;
zusätzliche spezifische Anforderungen für die Anwendung in Druckgeräten.
Sie gilt für warmgewalzte Platten, kaltgewalzte Bleche/Bänder/Ronden, Schmiedestücke, stranggepresste oder stranggepresste und gezogene Stangen und Rohre, für stranggepresste Voll und Hohlprofile sowie für Gussstücke.
In dieser Europäischen Norm werden lediglich die für Druckgräte vorgesehenen Werkstoffe aufgeführt, Herstellung oder Fertigungsverfahren für Druckgeräte werden nicht erfasst. Angaben dazu können in den zutreffenden Europäischen Normen gefunden werden, die unter den Literaturhinweisen aufgelistet sind.
Aluminium et alliages d'aluminium - Matériaux corroyés et moulés - Exigences particulières pour les matériaux destinés à être utilisés sous pression
La présente Norme européenne spécifie des exigences relatives aux matériaux ainsi que des procédures d’essai applicables à l’aluminium et aux alliages d’aluminium corroyés et moulés destinés à être utilisés pour la fabrication d’appareils à pression.
Elle couvre :
- les formes de produits, les nuances et les états métallurgiques de l’aluminium et des alliages d’aluminium corroyés et moulés susceptibles d’être utilisés pour ces applications, ainsi que des données relatives aux alliages corroyés et moulés sur leur plage de température de fonctionnement admissible ;
- les alliages/états métallurgiques admissibles couverts par la présente Norme européenne qui figurent dans les Tableaux A.1 et A.2 pour les alliages corroyés et dans les Tableaux B.1 et B.2 pour les pièces moulées ;
- les conditions techniques de contrôle et de livraison, les limites des caractéristiques mécaniques et les tolérances de forme et de dimensions, par référence aux Normes européennes appropriées relatives à l’aluminium et aux alliages d’aluminium corroyés et moulés correspondants .
- des exigences supplémentaires spécifiques des applications relatives aux récipients sous pression.
Elle s’applique aux plaques/tôles épaisses laminées à chaud, aux tôles minces/bandes/disques laminés à froid, aux pièces forgées, aux barres et aux tubes filés ou filés et étirés à froid, ainsi qu’aux sections filées, ouvertes/creuses et aux pièces moulées.
Le seul objet de la présente Norme européenne est de couvrir les matériaux uniquement destinés à des usages sous pression, excluant les éléments de fabrication ou les méthodes de fabrication des appareils à pression. Ces informations figurent dans les Normes européennes appropriées indiquées en Bibliographie.
Aluminij in aluminijeve zlitine - Gnetne zlitine in zlitine za litje - Posebne zahteve za aluminijeve izdelke za izdelavo naprav, ki delajo pod tlakom
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 12392:2008
01-september-2008
Aluminij in aluminijeve zlitine - Gnetne zlitine in zlitine za litje - Posebne zahteve za
aluminijeve izdelke za izdelavo naprav, ki delajo pod tlakom
Aluminium and aluminium alloys - Wrought and cast materials - Special requirements for
materials intended for pressure purpose
Aluminium und Aluminiumlegierungen - Knet- und Gusswerkstoffe - Besondere
Anforderungen an Werkstoffe für die Fertigung von Druckgeräten
Aluminium et alliages d'aluminium - Matériaux corroyés et moulés - Exigences
particulières pour les matériaux destinés à être utilisés sous pression
Ta slovenski standard je istoveten z: prEN 12392
ICS:
77.150.10 Aluminijski izdelki Aluminium products
oSIST prEN 12392:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 12392:2008
EUROPEAN STANDARD
DRAFT
prEN 12392
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2008
ICS 77.150.10 Will supersede EN 12392:2000
English Version
Aluminium and aluminium alloys - Wrought and cast materials -
Special requirements for materials intended for pressure
purpose
Aluminium et alliages d'aluminium - Matériaux corroyés et
moulés - Exigences particulières pour les matériaux
destinés à être utilisés sous pression
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 132.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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 CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12392:2008: E
worldwide for CEN national Members.
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prEN 12392:2008 (E)
Contents Page
Foreword.3
1 Scope.4
2 Normative references.4
3 Terms and definitions .5
4 Materials.6
5 Order documents.6
6 Product requirements.7
6.1 Production and manufacturing methods .7
6.2 Quality control.8
6.3 Chemical composition.8
6.4 Mechanical properties.8
6.5 Tolerances on dimensions and form.9
7 Test procedures – Sampling and testing .9
7.1 General.9
7.2 Chemical composition.9
7.3 Tensile and hardness testing .9
8 Test frequency and specific test requirements for individual products.9
8.1 Sheet, strip, plate and circles .9
8.2 Forgings.10
8.3 Extruded and cold drawn tube (in straight lengths or coiled) .10
8.4 Extruded profiles and hollow sections.11
8.5 Castings.11
9 Inspection documents.12
10 Marking of products .13
11 Packaging.13
Annex A (normative) Low and elevated temperature tensile properties for wrought products .14
Annex B (normative) Low and elevated temperature tensile properties for cast products .18
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EC Directive 97/23/EC .21
Bibliography .22
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Foreword
This document (prEN 12392:2008) has been prepared by Technical Committee CEN/TC 132 “Aluminium and
aluminium alloys”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12392:2000.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EC Directive 97/23/EC.
For relationship with EC Directive, see informative Annex ZA, which is an integral part of this document.
Within its programme of work, Technical Committee CEN/TC 132 entrusted CEN/TC 132/WG 14 "General
support" to revise EN 12392:2000.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN shall not be held responsible for identifying any or all such patent rights.
CEN/TC 132 affirms its policy that in the case when a patentee refuses to grant licences on standardised
standard products under reasonable and not discriminatory conditions, then this product shall be removed
from the corresponding standard.
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1 Scope
This European Standard specifies the material requirements and testing procedures applicable to wrought and
cast aluminium and aluminium alloys intended for use in the production of pressure equipment.
The European Standard covers:
the products forms, grades and tempers of wrought and cast aluminium and aluminium alloys which may
be used for such applications together with data for wrought and cast alloys over their permissible
working temperature ranges;
the permissible alloys/tempers covered by this European Standard are those given in Tables A.1 and A.2
for wrought alloys and Tables B.1 and B.2 for castings;
the technical conditions for inspection and delivery, mechanical property limits and tolerances on form
and dimensions by reference to the appropriate European standards for the relevant wrought and cast
aluminium and aluminium alloys;
additional requirements which are specific to pressure equipment applications.
It applies to hot-rolled plate, cold-rolled sheet/strip/circles, forgings, extruded or extruded and cold drawn
rod/bar, tube, extruded open/hollow profiles and castings.
It is the sole objective of this European Standard to cover materials only for pressure purposes and it excludes
any elements of fabrication or fabrication methods for pressure equipment. Such information may be found in
the relevant European Standards listed in Bibliography.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 485 (all parts), Aluminium and aluminium alloys — Sheet, strip and plate
EN 515, Aluminium and aluminium alloys — Wrought products — Temper designations
EN 573-3, Aluminium and aluminium alloys — Chemical composition and form of wrought products — Part 3:
Chemical composition and form of products
EN 583 (all parts), Non-destructive testing — Ultrasonic examination — Part 1: General principles
EN 586 (all parts), Aluminium and aluminium alloys — Forgings
EN 754 (all parts), Aluminium and aluminium alloys — Cold drawn rod/bar and tube
EN 755 (all parts), Aluminium and aluminium alloys — Extruded rod/bar, tube and profiles
EN 1370, Founding — Surface roughness inspection by visual tactile comparators
EN 1371-1, Founding — Liquid penetrant inspection — Part 1: Sand, gravity die and low pressure die castings
EN 1371-2, Founding — Liquid penetrant inspection — Part 2: Investment castings
EN 1706, Aluminium and aluminium alloys — Castings — Chemical composition and mechanical properties
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EN 1779, Non destructive testing — Leak testing — Criteria for method and technique selection
EN 2101, Aerospace series — Chromic acid anodizing of aluminium and wrought aluminium alloys
EN ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1:2005)
EN ISO 8492, Metallic materials — Tube — Flattening test (ISO 8492:1998)
EN ISO 8493, Metallic materials — Tube — Drift expanding test (ISO 8493:1998)
EN ISO 8496, Metallic materials — Tube — Ring tensile test (ISO 8496:1998)
EN 10002-1, Metallic materials — Tensile testing — Part 1: Method of test at ambient temperature
EN 10204:2004, Metallic products — Types of inspection documents
EN 12020-1, Aluminium and aluminium alloys — Extruded precision profiles in alloys EN AW-6060 and
EN AW-6063 — Part 1: Technical conditions for inspection and delivery
EN 12020-2, Aluminium and aluminium alloys — Extruded precision profiles in alloys EN AW-6060 and
EN AW-6063 — Part 2: Tolerances on dimensions and form
EN 12258-1, Aluminium and aluminium alloys — Terms and definitions — Part 1: General terms
EN 12680-1, Founding — Ultrasonic examination — Part 1: Steel castings for general purposes
1)
prEN 13957 , Aluminium and aluminium alloys — Extruded round, coiled tube for general applications —
Specification
1)
prEN 13958 , Aluminium and aluminium alloys — Cold drawn, round, coiled tube for general applications —
Specification
EN 14361, Aluminium and aluminium alloys — Chemical analysis — Sampling from metal melts
ISO 8062, Castings — System of dimensional tolerances and machining allowances
ASTM E112-96(2004), Standard Methods for Determining Average Grain Size
ASTM E215-98(2004), Standard Practice for Standardizing Equipment for Electromagnetic Examination of
Seamless Aluminum-Alloy Tube
ASTM B594-06, Standard Practice for Ultrasonic Inspection of Aluminum-Alloy Wrought Products for
Aerospace Applications
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12258-1 apply.
1) Under preparation.
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4 Materials
The materials covered by this document shall be used in a wide range of pressure equipment operating over
diverse range of both pressure and temperature. The range of applications extends from relatively low
pressure automotive equipment, such as heat exchangers, to heavy duty applications including unfired
pressure vessels. As a result, it is necessary for this document to detail an extensive range of aluminium alloy
forms, alloys and tempers as follows.
Sheet, strip, circles and plate (EN 485).
Forgings (EN 586).
Cold drawn rod/bar and tube (EN 754).
Extruded rod/bar, tube and profiles (EN 755).
Precision profiles (EN 12020-1 and EN 12020-2).
Extruded coiled tube (prEN 13957).
Cold drawn coiled tube (prEN 13958).
Castings (EN 1706).
5 Order documents
The order or tender documents shall define the product required and contain the following minimum
information.
a) The type and form of the product. In the case of tube whether extruded, cold drawn or coiled, it is also
essential to state the method of extrusion to be used, i.e. seamless or porthole.
b) The alloy to be used and the reference to EN 573-3 for wrought products and to EN 1706 for castings as
appropriate.
c) The temper of the material for delivery in accordance with EN 515 for wrought products and EN 1706 for
castings.
d) The reference to this European Standard.
e) The dimensions and shape of the particular product required:
plate: width, thickness and length;
sheet: width, thickness and length;
strip: width, thickness and coil dimensions;
circles: diameter and thickness;
forgings: reference to a drawing;
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2)
2)
round tube: method of production, outside or inside diameter , wall thickness and length;
2) 2)
coiled round tube: outside or inside diameter , wall thickness , coil dimensions and tube length if
required in straight lengths;
round bar: diameter and length;
square and hexagonal bar: width across flats and length;
rectangular bar: width, thickness and length;
extruded profiles and hollow sections: drawing of cross section and length;
castings: reference to a drawing.
f) The product tolerances on dimensions and form together with particular reference to the relevant
European standard for the specific product concerned.
g) Quantity required, whether weight, number of pieces, total length and the quantity tolerance on the total
amount of the order.
h) Product certification requirement with particular reference to EN 10204.
i) Identification marking requirements.
j) Any other special requirements agreed between supplier and purchaser. Reference to design standard,
test methods, test frequency, reference to drawings, part numbers or any other special requirements.
k) Surface finish requirements particularly details of any surface treatments to be carried out.
l) Surface protection oil requirements.
m) Packaging methods to be used.
n) Any additional inspection to be carried out prior to delivery.
6 Product requirements
6.1 Production and manufacturing methods
6.1.1 General
Unless otherwise agreed between supplier and purchaser, the production and manufacturing methods used
shall be left to the discretion of the supplier. In addition, there shall be no obligation on the supplier to use the
same processes or process route for subsequent or similar orders.
6.1.2 Comment on the methods of tube extrusion
Some further explanation is necessary in the case of extruded and extruded/ cold drawn tube where either the
porthole or seamless methods of extrusion are available for use. It is suggested that the porthole method may
be used for relatively low pressure equipment, such as automotive heat exchangers etc.
2) Two of these dimensions may be given with tolerances, but not all three.
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When the porthole method is used, then the recommended method of testing the weld integrity is
EN ISO 8492 and the frequency of testing shall be agreed between the supplier and purchaser.
Other methods may be used if both the method and test frequency is agreed between the supplier and
purchaser.
The porthole extruded alloys that may be used in conjunction with this document shall be restricted to those
listed in EN 754-8 and EN 755-8.
6.2 Quality control
The manufacturer/supplier shall be responsible for the performance of all inspection and tests required by the
relevant European standard and/or the particular specification prior to shipment of the product. If the
purchaser wishes to carry out an inspection prior to shipment, this shall be agreed with the supplier and the
request stated on the original order.
6.3 Chemical composition
The chemical composition limits shall comply with those given in EN 573-3 for wrought products and EN 1706
for castings for the particular alloy concerned. If the purchaser requires limits for elements other than those
specified in these European Standards, then these special limits shall be agreed with the supplier and stated
on the original order. Specific examples are as follows.
a) A maximum lead content of 150 ug/g or any other agreed value for fracture toughness safety sensitive
applications.
b) A maximum hydrogen content of 0,2 ml/100 g determined by the hot extraction method at the melt
(measured ing/casting stage) for applications that involve fusion welding. Other methods of determining
the hydrogen content may be used if both the method and maximum hydrogen content is agreed between
supplier and purchaser.
6.4 Mechanical properties
The mechanical property limits for a given alloy and temper shall be in compliance with the appropriate
European Standards for that particular product:
prEN 485-2:2008 for sheet, strip, plate and circles;
EN 586-2:1994 for forgings;
EN 754-2:2008 for cold drawn rod/bar and tube;
EN 755-2:2008 for extruded rod/bar, tube and profiles;
EN 1706:1998 for castings.
NOTE 1 For wrought products all hardness values quoted are for information only, unless otherwise agreed between
supplier and purchaser.
NOTE 2 It is important to recognise that welding of all strain hardened tempers (eg H**/ H***) and heat treated tempers
(T** and T***) results in a significant change (normally a reduction) in mechanical properties as a result of the welding
operation.
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6.5 Tolerances on dimensions and form
Tolerances on dimensions and form shall be in accordance with the appropriate European Standards for the
wrought or cast product in question, e.g. EN 755-3 to EN 755-9 inclusive for extruded products and ISO 8062
for castings.
7 Test procedures – Sampling and testing
7.1 General
This Clause covers only chemical composition and tensile/hardness testing which are common to all the
products. The remaining test procedures and methods are given in the clauses dealing with the individual
products.
Regarding the standards to be used for testing, EN or EN ISO standards shall be used whenever possible.
However, other standards, such as ASTM, may be used when EN or EN ISO are not available or not
considered appropriate.
7.2 Chemical composition
The samples for chemical analysis shall be taken at the time of casting in accordance with EN 14361.The
methods of analysis used should be at the discretion of the supplier or by agreement between the supplier
and purchaser.
7.3 Tensile and hardness testing
The methods used shall be in compliance with EN 10002-1 for tensile testing and EN ISO 6506-1 for Brinell
hardness testing. Other methods of hardness testing, e.g. Webster method, may be used subject to
agreement between supplier and purchaser. This agreement shall also include the frequency of testing and
the minimum acceptable value for that particular method.
8 Test frequency and specific test requirements for individual products
8.1 Sheet, strip, plate and circles
8.1.1 Tensile test
A minimum of one test piece shall be taken from each cast represented in each inspection or heat treatment
lot of 10 000 kg or a part thereof. For a single plate or coil weighing more than 10 000 kg, only one test piece
shall be taken from the plate or coil in question.
8.1.2 Bend test
When specified and agreed between supplier and purchaser, a bend test shall be carried out in accordance
with EN 485-2.
8.1.3 Ultrasonic test
When specified and agreed between supplier and purchaser, ultrasonic test shall be carried out in accordance
with ASTM B594, Class A.
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8.2 Forgings
8.2.1 Tensile test
For forgings weighing up to and including 2 kg, a minimum of one test piece shall be taken from each
inspection or heat treatment lot of 1 000 kg or part thereof.
For forgings weighing over 2 kg and up to and including 10 kg, a minimum of one test piece shall be taken
from each inspection or heat treatment lot of 2 000 kg or part thereof.
For forgings weighing over 10 kg, a minimum of one test piece shall be taken from each inspection or heat
treatment lot of 3 000 kg or part thereof.
8.2.2 Surface inspection
When specified and agreed between supplier and purchaser, all hand or die forgings shall be visually
inspected on all surfaces using one of the following methods:
pickling only;
pickling and chromic acid anodizing in accordance with EN 2101.
The test method selected shall be agreed between the supplier and purchaser and stated on the order.
The surface of the forging shall be free from any defects prejudicial to its use, for example cracks, cold shuts
etc. Anyway reference standards of such defects shall be agreed between supplier and purchaser.
8.3 Extruded and cold drawn tube (in straight lengths or coiled)
8.3.1 Tube produced by the porthole extrusion method
a) A minimum of one tensile test shall be taken for every 1 000 kg or part thereof for each inspection or heat
treatment lot.
b) A weld integrity test according to EN ISO 8493 shall be carried out and the frequency of the test shall be
agreed between supplier and purchaser. Other methods of testing may be used, but both the test method
and frequency shall be agreed between supplier and purchaser.
c) When specified and agreed between supplier and purchaser, a test for leaks shall be carried out on tubes
with an outside diameter of 40 mm or less using one of the two following methods. The frequency of
testing shall be agreed between supplier and purchaser.
Method 1 applicable to tubes with a wall thickness of 5 mm maximum. Each tube shall be subjected
to an internal air gauge pressure of 1 700 kPa for 5 s while immersed in a suitable liquid. Any
evidence of leakage shall be cause for rejection.
Method 2 applicable to tube with a wall thickness of 2 mm (according to ASTM E215). Each tube
shall be subjected to an eddy-current test in accordance with the procedures described in
ASTM E215. Reference standards described in Clauses A1 and A2 of ASTM E215 shall be used to
standardise the equipment. The same reference standards or secondary standards having equivalent
eddy-current response shall serve to define acceptance/ rejection limits. Tubes that produce eddy–
current indications less than those from the 24 holes of the applicable reference standard or an
equivalent secondary standard shall be acceptable. Any tube having a discontinuity that produces an
eddy-current indication equal to or greater than that from the 24 holes of the applicable reference
standard or an equivalent secondary standard shall be rejected.
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8.3.2 Tube produced by the seamless extrusion method to be used for heavy duty applications or
unfired pressure vessels
a) A minimum of two tensile tests shall be taken for each 1 000 kg or part thereof for each cast represented
in every inspection or heat treatment lot.
b) When specified, a notch impact bending test shall be carried out. The test method, frequency and
minimum acceptable value shall be agreed between supplier and purchaser.
c) When specified, the following tests shall be carried out:
a ring flattening test according to EN ISO 8492 for tube with an outside diameter of up to 18 mm;
a drift expansion test according to EN ISO 8493 for outside diameters of 18 mm to 146 mm;
a ring tensile test according to EN ISO 8496 for outside diameters greater than 146 mm.
The test frequency shall be agreed between supplier and purchaser.
d) When specified, grain size shall be measured according to ASTM E112. The frequency of testing and the
minimum grain size value shall be agreed between supplier and purchaser.
e) Eddy current testing of every tube length shall be carried out according to ASTM E215 for tubes up to and
including 5 mm wall thickness and/or 170 mm outside diameter.
f) Ultrasonic testing shall be carried out for every tube length according to ASTM B594, Class A for tubes
over 5 mm wall thickness and/or outside diameters over 170 mm.
8.4 Extruded profiles and hollow sections
8.4.1 Tensile test
For profiles and hollow sections having a nominal mass of up to and including 1 kg/m, a minimum of one test
piece shall be taken from each cast represented in each inspection or heat treatment lot of 1 000 kg or part
thereof.
For profiles and hollow sections having a nominal mass of over 1 kg/m and up to and including 5 kg/m, a
minimum of one test piece shall be taken from each cast represented in each inspection or heat treatment lot
of 2000 kg or part thereof.
8.4.2 Expansion test
In the case of star–sections for unfired pressure vessels made from EN AW-6060 T4 and in all sizes, an
expansion test shall be carried out in accordance with EN ISO 8493. The test can be discontinued on
attainment of 30 % expansion of the test sample. The frequency of testing shall be subject to agreement
between supplier and purchaser.
8.5 Castings
8.5.1 Chemical analysis
Chemical analysis shall be carried out on samples taken from the same melt as the castings. The samples
shall be cooled quickly enough to minimise any segregation effects.
The frequency of sampling depends on the particular process/casting in question and shall therefore be
agreed between the supplier and customer. The frequency, for example, may vary from one sample per
charge to one sample per shift (in the case of the holding furnace of a high pressure die casting machine).
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8.5.2 Tensile test
It is essential that the supplier and customer shall agree on the position, orientation, dimensions and cooling
rate of the tensile test pieces. Depending on this agreement, the test pieces may be cast:
separately from the castings, but from the same melt and in a special mould (made from the same
material as the castings themselves);
at the same time as the castings, i.e. the test piece attached to the casting itself.
In both cases, the cooling rate of the test samples shall be adjusted to achieve a microstructure compatible
with the castings particularly in critical areas which may be subject to subsequent heat treatment.
The minimum tensile value required shall be in accordance with EN 1706 and these values shall be used in
conjunction with the design standard for the particular casting in question.
Again the test frequency shall be agreed between the supplier and purchaser and may vary from one sample
per casting to one sample per production shift.
8.5.3 Functional test
In certain cases (e.g. small high pressure die cas
...
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