EN 755-9:2016

SLOVENSKI STANDARD
01-september-2016
1DGRPHãþD
SIST EN 755-9:2008
Aluminij in aluminijeve zlitine - Iztiskane palice/drogovi, cevi in profili - 9. del:
Profili, tolerance mer in oblike
Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles - Part 9: Profiles,
tolerances on dimensions and form
Aluminium und Aluminiumlegierungen - Stranggepresste Stangen, Rohre und Profile -
Teil 9: Profile, Grenzabmaße und Formtoleranzen
Aluminium et alliages d'aluminium - Barres, tubes et profilés filés - Partie 9 : Profilés,
tolérances sur dimensions et forme
Ta slovenski standard je istoveten z: EN 755-9:2016
ICS:
77.150.10 Aluminijski izdelki Aluminium products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 755-9
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2016
EUROPÄISCHE NORM
ICS 77.150.10 Supersedes EN 755-9:2008
English Version
Aluminium and aluminium alloys - Extruded rod/bar, tube
and profiles - Part 9: Profiles, tolerances on dimensions
and form
Aluminium et alliages d'aluminium - Barres, tubes et Aluminium und Aluminiumlegierungen -
profilés filés - Partie 9 : Profilés, tolérances sur Stranggepresste Stangen, Rohre und Profile - Teil 9:
dimensions et forme Profile, Grenzabmaße und Formtoleranzen
This European Standard was approved by CEN on 11 April 2016.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 755-9:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 5
2 Alloy groups . 5
3 Tolerances on dimensions . 6
3.1 Cross-sectional dimensions . 6
3.1.1 General . 6
3.1.2 Tolerances on dimensions other than wall thickness . 6
3.1.3 Tolerances on wall thickness of solid and hollow profiles . 9
3.2 Length . 11
3.3 Squareness of cut ends . 12
4 Tolerances on form . 12
4.1 General . 12
4.2 Straightness . 12
4.3 Convexity-Concavity . 12
4.4 Contour . 14
4.5 Twist . 15
4.6 Angularity . 17
4.7 Corner and fillet radii . 18
Bibliography . 20

European foreword
This document (EN 755-9:2016) 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 December 2016, and conflicting national standards
shall be withdrawn at the latest by December 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN 755-9:2008.
The following technical modifications have been introduced during the revision:
— Subclause 4.2, Straightness;
— Subclause 4.3, Convexity-Concavity;
— Table 10;
— Subclause 4.4 Contour;
— Table 11;
— Subclause 4.5, Twist.
EN 755 comprises the following parts under the general title Aluminium and aluminium alloys —
Extruded rod/bar, tube and profiles:
— Part 1: Technical conditions for inspection and delivery;
— Part 2: Mechanical properties;
— Part 3: Round bars, tolerances on dimensions and form;
— Part 4: Square bars, tolerances on dimensions and form;
— Part 5: Rectangular bars, tolerances on dimensions and form;
— Part 6: Hexagonal bars, tolerances on dimensions and form;
— Part 7: Seamless tubes, tolerances on dimensions and form;
— Part 8: Porthole tubes, tolerances on dimensions and form;
— Part 9: Profiles, tolerances on dimensions and form.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
This European Standard specifies the tolerances on dimensions and form for aluminium and aluminium
alloy extruded profile with a cross section contained within a circumscribing circle not greater than
800 mm (see Figure 1).
The temper designations used in this part are according to EN 515.
This European Standard applies to extruded profiles for general engineering applications only.

Key
1 circumscribing circle CD ≤ 800 mm
Figure 1 — Circumscribing circle
2 Alloy groups
For the purpose of this document, the alloys are distributed into two groups which correspond to
varying degrees of difficulty when manufacturing the products.
The division into group I and group II of the most commonly used general engineering alloys is
specified in Table 1. Grouping of other alloys is subject to agreement between supplier and purchaser.
Table 1 — Alloy groups
Group I EN AW-1050A, EN AW-1070A, EN AW-1200, EN AW-1350
EN AW-3102, EN AW-3003, EN AW-3103
EN AW-5005, EN AW-5005A
EN AW-6101A, EN AW-6101B, EN AW-6005, EN AW-6005A, EN AW-6106, EN
AW-6008, EN AW-6010A, EN AW-6023, EN AW-6060,
EN AW-6360, EN AW-6063, EN AW-6063A, EN AW-6463
Group II EN AW-2007, EN AW-2011, EN AW-2011A, EN AW-2014,
EN AW-2014A, EN AW-2017A, EN AW-2024, EN AW-2030
EN AW-5019, EN AW-5049, EN AW-5051A, EN AW-5251, EN AW-5052,
EN AW-5154A, EN AW-5454, EN AW-5754, EN AW-5083, EN AW-5086
EN AW-6012, EN AW-6014, EN AW-6018, EN AW-6351, EN AW-6061,
EN AW-6261, EN AW-6262, EN AW-6262A, EN AW-6065, EN AW-6081, EN AW-
6082, EN AW-6182
EN AW-7003, EN AW-7005, EN AW-7108, EN AW-7108A, EN AW-7020,
EN AW-7021, EN AW-7022, EN AW-7049A, EN AW-7075

3 Tolerances on dimensions
3.1 Cross-sectional dimensions
3.1.1 General
The tolerances on the dimensions listed below (see Figures 2, 3 and 4) are specified in the relevant
Tables 2 to 9.
— 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. Between points on the outer contour to points inside a hollow
chamber so long as they are not identical to wall thickness B. Alternatively from the inside of a
hollow chamber to the inside of another hollow chamber so long as they are not identical to wall
thickness C and are not within the definition of dimension H. Such dimensions shall be replaced by
dimension H plus wall thickness B or C or shall be subject to agreement between supplier and
purchaser.
Figure 2 — Definition of dimensions A, B, C, E, H
3.1.2 Tolerances on dimensions other than wall thickness
The tolerances on dimensions shall be as specified in Tables 2 and 3. For profiles with open ends
(see Figures 3, 4 and the relevant examples) the tolerances specified in Table 4 shall be added to those
of Tables 2 and 3 for dimension H across open ended legs in order to obtain the tolerances on the gap
between any opposite points on these ends.
Table 2 — Tolerances on cross-sectional dimensions of solid and hollow profiles - Alloy group I
Dimensions in millimetres
a, b
Dimension H Tolerances on H for circumscribing circle CD
Up to and
Over CD ≤ 100 100 < CD ≤ 200 200 < CD ≤ 300 300 < CD ≤ 500 500 < CD ≤ 800
including
- 10 ±0,25 ±0,30 ±0,35 ±0,40 ±0,50
10 25 ±0,30 ±0,40 ±0,50 ±0,60 ±0,70
25 50 ±0,50 ±0,60 ±0,80 ±0,90 ±1,0
50 100 ±0,70 ±0,90 ±1,1 ±1,3 ±1,5
100 150 - ±1,1 ±1,3 ±1,5 ±1,7
150 200 - ±1,3 ±1,5 ±1,8 ±2,0
200 300 - - ±1,7 ±2,1 ±2,4
300 450 - - - ±2,8 ±3,0
450 600 - - - ±3,8 ±4,2
600 800 - - - - ±5,0
a
These tolerances do not apply to tempers O and Tx510. For these tempers, the tolerances shall be subject to agreement
between supplier and purchaser.
b
For profiles with open ends, see Figures 3 and 4, the tolerances for H in the area of the open ends shall be increased by the
values specified in Table 4.
Table 3 — Tolerances on cross-sectional dimensions of solid and hollow profiles - Alloy group II
Dimensions in millimetres
a, b
Dimension H Tolerances on H for circumscribing circle CD
Up to and
Over CD ≤ 100 100 < CD ≤ 200 200 < CD ≤ 300 300 < CD ≤ 500 500 < CD ≤ 800
including
- 10 ±0,40 ±0,50 ±0,55 ±0,60 ±0,70
10 25 ±0,50 ±0,70 ±0,80 ±0,90 ±1,1
25 50 ±0,80 ±0,90 ±1,0 ±1,2 ±1,3
50 100 ±1,0 ±1,2 ±1,3 ±1,6 ±1,8
100 150 - ±1,5 ±1,7 ±1,8 ±2,0
150 200 - ±1,9 ±2,2 ±2,4 ±2,7
200 300 - - ±2,5 ±2,8 ±3,1
300 450 - - - ±3,5 ±3,8
450 600 - - - ±4,5 ±5,0
600 800 - - - - ±6,0
a
These tolerances do not apply to tempers O and Tx510. For these tempers, the tolerances shall be subject to agreement
between supplier and purchaser.
b
For profiles with open ends, see Figures 3 and 4, the tolerances for H in the area of the open ends shall be increased by the
values specified in Table 4.
Table 4 — Additions to the tolerances on cross-sectional dimensions H of solid and hollow
profiles with open ends - Alloy groups I and II
Dimensions in millimetres
Dimension E
Additions to the tolerances on H in Tables 2 and 3 for
dimensions across the ends of open ended profiles
Over Up to and including
- 20 -
20 30 ±0,15
30 40 ±0,25
40 60 ±0,40
60 80 ±0,50
80 100 ±0,60
100 125 ±0,80
125 150 ±1,0
150 180 ±1,2
180 210 ±1,4
210 250 ±1,6
250 - ±1,8
Figures 3 and 4 below show open ends on hollow and solid profiles. The determination of tolerances on
cross-sectional dimensions H is shown in the following calculation examples 1 and 2.
Examples of tolerance calculations across open ended profiles.
EXAMPLE 1
Dimension H: 20 mm
Dimension E: 100 mm Circumscribing circle CD 100 mm to 200 mm Alloy Group I
The tolerance on H according to Table 2 is ± 0,40 mm; plus the additional tolerance according to Table 4 which
is ± 0,60 mm; total tolerance on H is ± 1,0 mm.

Figure 3 — Hollow profile with
...