EN 12020-2:2022

SLOVENSKI STANDARD
01-marec-2023
Nadomešča:
SIST EN 12020-2:2017
SIST EN 12020-2:2017/AC:2017
Aluminij in aluminijeve zlitine - Precizni iztiskani profili v zlitinah EN AW-6060 in
EN AW-6063 - 2. del: Tolerance mer in oblike
Aluminium and aluminium alloys - Extruded precision profiles in alloys EN AW-6060 and
EN AW-6063 - Part 2: Tolerances on dimensions and form
Aluminium und Aluminiumlegierungen - Stranggepresste Präzisionsprofile aus
Legierungen EN AW-6060 und EN AW-6063 - Teil 2: Grenzabmaße und Formtoleranzen
Aluminium et alliages d'aluminium - Profilés de précision filés en alliages EN AW-6060 et
EN AW-6063 - Partie 2 : Tolérances sur dimensions et forme
Ta slovenski standard je istoveten z: EN 12020-2:2022
ICS:
77.150.10 Aluminijski izdelki Aluminium products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 12020-2
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2022
EUROPÄISCHE NORM
ICS 77.150.10 Supersedes EN 12020-2:2016
English Version
Aluminium and aluminium alloys - Extruded precision
profiles in alloys EN AW-6060 and EN AW-6063 - Part 2:
Tolerances on dimensions and form
Aluminium et alliages d'aluminium - Profilés de Aluminium und Aluminiumlegierungen -
précision filés en alliages EN AW-6060 et EN AW-6063 Stranggepresste Präzisionsprofile aus Legierungen EN
- Partie 2 : Tolérances sur dimensions et forme AW-6060 und EN AW-6063 - Teil 2: Grenzabmaße und
Formtoleranzen
This European Standard was approved by CEN on 30 October 2022.

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, Türkiye 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12020-2:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 Tolerances on dimensions . 5
4.1 General . 5
4.2 Cross-sectional dimensions . 5
4.3 Length . 7
4.4 Squareness of cut ends . 8
4.5 Length offset for profiles with a thermal barrier . 8
5 Tolerances on form . 8
5.1 Parallelism . 8
5.2 Straightness . 9
5.3 Convexity-Concavity . 10
5.4 Contour . 12
5.5 Twist . 13
5.6 Angularity . 15
5.7 Corner and fillet radii . 16
Bibliography . 18

European foreword
This document (EN 12020-2:2022) 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 June 2023, and conflicting national standards shall be
withdrawn at the latest by June 2023.
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.
This document supersedes EN 12020-2:2016.
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, Türkiye and the
United Kingdom.
1 Scope
This document specifies tolerances on dimensions and form of extruded precision profiles in alloys
EN AW-6060 and EN AW-6063, manufactured with and without a thermal barrier (see Figures 1 and 2).
It applies to extruded products supplied without further surface treatment. Precision profiles covered
in this document are distinguished from extruded profiles for general applications covered in EN 755-9
by the following characteristics:
— they are designed with mostly uniform wall-thicknesses;
— they are mainly used for mechanical engineering, architectural and automotive (except crash-
elements) applications;
— their maximum weight per metre is 10 kg/m;
— their maximum wall thickness ratio (t /t ) is 3,5.
max min
In the case of profiles which, due to the complexity of their design, are difficult to manufacture and
specify, then special agreements between supplier and purchaser may need to be reached.
NOTE The effect of the thermal barrier material on the dimensional tolerances is covered by this document
although the actual thermal barrier material itself is not (see EN 14024).

Key Key
1 CD maximum 350 mm 1 CD maximum 350 mm
2 thermal barriers
Figure 1 — Profile without thermal barrier Figure 2 — Profile containing thermal barrier

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 ISO 1101, Geometrical product specifications (GPS) - Geometrical tolerancing - Tolerances of form,
orientation, location and run-out (ISO 1101)
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
4 Tolerances on dimensions
4.1 General
If, for compelling reasons, tolerances closer than those specified in 4.2.2 are required, these shall only
be specified for dimensions that are critical to the function, subject to specific agreement between
supplier and purchaser. Any such reduction shall not exceed two-thirds of the values specified in this
document and is subject to a minimum tolerance band of 0,3 mm.
4.2 Cross-sectional dimensions
4.2.1 General
The tolerances of the following dimensions (see Figure 3) are specified in Tables 1 and 2.
— A: wall thicknesses except those enclosing the hollow spaces in hollow profiles;
— B: wall thicknesses enclosing the hollow spaces in hollow profiles, except those between two
hollow spaces;
— C: wall thicknesses between two hollow spaces in hollow profiles;
— E: the length of the shorter leg of profiles with open ends;
— H: all dimensions (except wall thickness) between points on the cross section of the profile or the
centres of open screw holes, including open ends.
Figure 3 — Definition of dimensions A, B, C, E, H
4.2.2 Tolerances on dimensions other than wall thickness
The tolerances for dimension H shall be as specified in Table 1.
Table 1 — Tolerances on cross-sectional dimensions
Dimensions in millimetres
Dimension H Tolerances on H Tolerances on H (open ends)
a
Over Up to and including (except open ends) E ≤ 60 60 < E ≤ 120
b
- 10 ±0,15 ±0,15
b
10 15 ±0,20 ±0,20
b
15 30 ±0,25 ±0,25
30 45 ±0,30 ±0,30 ±0,45
45 60 ±0,40 ±0,40 ±0,55
60 90 ±0,45 ±0,45 ±0,65
90 120 ±0,60 ±0,60 ±0,80
120 150 ±0,80 ±0,80 ±1,0
150 180 ±1,0 ±1,0 ±1,3
180 240 ±1,2 ±1,2 ±1,5
240 300 ±1,5 ±1,5 ±1,8
300 350 ±1,8 ±1,8 ±2,1
NOTE Tolerances given in Table 1 do not cover dimensions from a given point inside a closed hollow chamber
to any other point outside the chamber.
a
Tolerances on dimension H for values of dimension E over 120 mm by agreement between supplier and
purchaser.
b
By agreement between purchaser and supplier.
4.2.3 Tolerances on wall thickness of solid and hollow profiles
The tolerances on wall thickness (see Figure 3) of solid and hollow profiles shall be as specified in
Table 2.
Table 2 — Tolerances on wall thickness of solid and hollow profiles
Dimensions in millimetres
Tolerances on:
Nominal wall thickness A, B
or C
Wall thickness A Wall thickness B and C
Up to and Circumscribing Circumscribing Circumscribing Circumscribing
Over including circle circle circle circle
CD ≤ 100 100 < CD ≤ 350 CD ≤ 100 100 < CD ≤ 350
- 2 ±0,15 ±0,20 ±0,20 ±0,30
2 3 ±0,15 ±0,25 ±0,25 ±0,40
3 6 ±0,20 ±0,30 ±0,40 ±0,60
6 10 ±0,25 ±0,35 ±0,60 ±0,80
10 15 ±0,30 ±0,40 ±0,80 ±1,0
15 20 ±0,35 ±0,45 ±1,2 ±1,5
20 30 ±0,40 ±0,50 a a
a a
30 40 ±0,45 ±0,60
a
By agreement between supplier and purchaser.
When, for functional reasons, tolerances are specified for both the outside and inside dimensions of
hollow sections, then the deviations given in Table 2 shall not apply as a wall thickness tolerance, but as
a tolerance on the difference in wall thickness. This difference shall be determined by measuring the
maximum and minimum wall thickness in the same plane.
4.3 Length
If fixed lengths are to be supplied, this shall be stated on the order. The fixed length tolerances shall be
as specified in Table 3.
Table 3 — Tolerances on fixed length
Dimensions in millimetres
Circumscribing
Tolerances on fixed length L
circle CD
Up to and
Over L ≤ 2 000 2 000 < L ≤ 5 000 5 000 < L ≤ 10 000 L > 10 000
including
- 100 +5 +7 +10
0 0 0 Subject to
agreement
100 200 +7 +9 +12
between
0 0 0
supplier and
200 350 +8 + 11 +14 purchaser
0 0 0
If no fixed or minimum length is specified in the order, profiles may be delivered in random lengths. The
length range and the tolerances on the random lengths shall be subject to agreement between supplier
and purchaser.
4.4 Squareness of cut ends
The squareness of cut ends shall be within half of the fixed length tolerance range specified in Table 3
+ 10
for both fixed and random lengths, e.g. for a fixed length tolerance of mm the deviation from
squareness of cut ends shall be within 5 mm measured over all the complete cross sectional width of
the profile.
4.5 Length offset for profiles with a thermal barrier
Length offset K, see Figure 4, for profiles with a thermal barrier shall be within the tolerance range for
+ 10
the fixed length specified in Table 3, e.
...