EN 1706:2020+A1:2021

SLOVENSKI STANDARD
01-oktober-2021
Aluminij in aluminijeve zlitine - Ulitki - Kemična sestava in mehanske lastnosti
Aluminium and aluminium alloys - Castings - Chemical composition and mechanical
properties
Aluminium und Aluminiumlegierungen - Gussstücke - Chemische Zusammensetzung
und mechanische Eigenschaften
Aluminium et alliages d'aluminium - Pièces moulées - Composition chimique et
propriétés mécaniques
Ta slovenski standard je istoveten z: EN 1706:2020+A1:2021
ICS:
77.040.30 Kemijska analiza kovin Chemical analysis of metals
77.150.10 Aluminijski izdelki Aluminium products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 1706:2020+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2021
EUROPÄISCHE NORM
ICS 77.150.10 Supersedes EN 1706:2020
English Version
Aluminium and aluminium alloys - Castings - Chemical
composition and mechanical properties
Aluminium et alliages d'aluminium - Pièces moulées - Aluminium und Aluminiumlegierungen - Gussstücke -
Composition chimique et propriétés mécaniques Chemische Zusammensetzung und mechanische
Eigenschaften
This European Standard was approved by CEN on 2 March 2020 and includes Amendment 1 approved by CEN on 1 July 2021.

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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1706:2020+A1:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 Ordering information . 6
5 Designation systems . 7
5.1 Numerical designation system . 7
5.2 Chemical symbol based designation system . 7
5.3 Temper designations . 7
5.4 Casting process designations . 7
5.5 Designations to be included in drawings . 7
6 Chemical composition . 8
6.1 General . 8
6.2 Samples for chemical analysis . 8
7 Mechanical properties . 14
7.1 General . 14
7.2 Tensile tests . 18
7.3 Test pieces . 18
7.3.1 General . 18
7.3.2 Separately cast test samples . 18
7.3.3 Test pieces taken from castings . 19
7.4 Hardness tests . 20
8 Rounding rules for determination of compliance . 20
Annex A (informative) Mechanical properties of high pressure die cast alloys . 21
Annex B (informative) Potentially achievable mechanical properties of test pieces taken
from a casting . 22
Annex C (informative) Comparison of casting characteristics, mechanical and other
properties . 24
Annex D (informative) Comparison between cast aluminium alloy designations . 33
Bibliography . 35

European foreword
This document (EN 1706:2020+A1:2021) has been prepared by Technical Committee CEN/TC 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 of an
identical text or by endorsement, at the latest by February 2022, and conflicting national standards
shall be withdrawn at the latest by February 2022.
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 it is its policy that in the case when a patentee refuses to grant licences on
standardized products under reasonable and not discriminatory conditions, then this product shall be
removed from the corresponding standard.
This document supersedes !EN 1706:2020".
!deleted text"
This document includes Amendment 1 approved by CEN on 7 June 2021.
The start and finish of text introduced or altered by amendment is indicated in the text by tags !".
Within its programme of work, Technical Committee CEN/TC 132 entrusted CEN/TC 132/WG 23
“Revision of EN 1676 and EN 1706” to revise EN 1706:2010.
!Any feedback and questions on this document should be directed to the users’ national standards
body. A complete listing of these bodies can be found on the CEN website."
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
1 Scope
This document specifies the chemical composition limits for aluminium casting alloys and mechanical
properties of separately cast test pieces for these alloys.
Annex C is included as a guide to the selection of alloys for a specific use or process.
This document is intended to be used in conjunction with EN 576, EN 1559-1, EN 1559-4, EN 1676 and
EN ISO 8062-3.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 576, Aluminium and aluminium alloys — Unalloyed aluminium ingots for remelting — Specifications
EN 1559-1, Founding — Technical conditions of delivery — Part 1: General
EN 1559-4, Founding — Technical conditions of delivery — Part 4: Additional requirements for
aluminium alloy castings
EN 1780-1, Aluminium and aluminium alloys — Designation of alloyed aluminium ingots for remelting,
master alloys and castings — Part 1: Numerical designation system
EN 1780-2, Aluminium and aluminium alloys — Designation of alloyed aluminium ingots for remelting,
master alloys and castings — Part 2: Chemical symbol based designation system
EN 1780-3, Aluminium and aluminium alloys — Designation of alloyed aluminium ingots for remelting,
master alloys and castings — Part 3: Writing rules for chemical composition
EN ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
(ISO 6892-1)
EN ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1)
EN 12258-1:2012, Aluminium and aluminium alloys — Terms and definitions — Part 1: General terms
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12258-1:2012 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp/ui
3.1
casting
product at or near finished shape, formed by solidification of the metal in a mould or a die
[SOURCE: EN 12258-1:2012, 2.5.1]
3.2
sand casting
casting produced by pouring molten metal into a sand mould and allowing it to solidify
[SOURCE: EN 12258-1:2012, 2.5.2]
3.3
permanent mould casting
casting produced by introducing molten metal by gravity or low pressure into a mould constructed of
durable material, typically iron or steel, and allowing it to solidify
Note 1 to entry: Permanent mould casting where the metal solidifies in a metal mould under low pressure
(typically less than 1 bar above atmospheric pressure) is also referred to as “low pressure die casting”.
Note 2 to entry: Permanent mould casting, which is made using an expendable core such as sand, is often
(mainly in the USA) termed “semi-permanent mould casting”.
[SOURCE: EN 12258-1:2012, 2.5.3]
3.4
low pressure die casting
process in which molten metal is poured into a metal mould and solidified under low pressure
(typically 7 kPa above atmospheric pressure)
Note 1 to entry: This process can also be used with a sand mould, being called “low pressure sand casting”.
3.5
high pressure die casting
process in which molten metal is poured into a permanent metal mould and solidified under high
pressure (typically 7 MPa)
3.6
investment casting
precision casting formed by a three step process comprising:
a) fabrication of a ceramic mould around a wax or thermoplastic pattern with a refractory slurry that
sets at room temperature;
b) removal of the pattern through the use of heat;
c) pouring of metal into this mould and allowing it to solidify.
[SOURCE: EN 12258-1:2012, 2.5.6]
3.7
fluidity
ability of a liquid metal to flow (into a mould)
[SOURCE: EN 12258-1:2012, 4.5.23]
3.8
hot tearing
tendency for a crack to form in a casting due to the development of internal stress during solidification
3.9
pressure tightness
absence of leakage at a specified pressure
[SOURCE: EN 12258-1:2012, 4.3.27]
3.10
order document
document or set of documents to which supplier and purchaser agreed at the time of ordering
Note 1 to entry: An ordering document can be an order of the purchaser confirmed by the supplier or a
quotation of the supplier confirmed by the purchaser.
[SOURCE: EN 12258-1:2012, 3.11.10]
4 Ordering information
The order document shall include a reference to this document. It shall include all the ordering
information as required in EN 1559-1 and EN 1559-4.
5 Designation systems
5.1 Numerical designation system
The numerical designation system shall be in accordance with EN 1780-1.
5.2
...