SIST EN 754-8:2008

SLOVENSKI STANDARD
SIST EN 754-8:2008
01-maj-2008
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SIST EN 754-8:1999
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Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 8: Porthole tubes,
tolerances on dimensions and form
Aluminium und Aluminiumlegierungen - Gezogene Stangen und Rohre
- Teil 8: Mit
Kammerwerkzeug Stranggepresste Rohre, Grenzabmaße und Formtoleranzen
Aluminium et alliage d'aluminium - Barre et tubes etires - Partie 8: Tubes filés a pont,
tolérances sur dimensions et forme
Ta slovenski standard je istoveten z: EN 754-8:2008
ICS:
77.150.10
SIST EN 754-8:2008 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN 754-8
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2008
ICS 77.150.10 Supersedes EN 754-8:1998
English Version
Aluminium and aluminium alloys - Cold drawn rod/bar and tube -
Part 8: Porthole tubes, tolerances on dimensions and form
Aluminium et alliages d'aluminium - Barres et tubes étirés - Aluminium und Aluminiumlegierungen - Gezogene Stangen
Partie 8: Tubes filés à pont, tolérances sur dimensions et und Rohre - Teil 8: Mit Kammerwerkzeug Stranggepresste
forme Rohre, Grenzabmaße und Formtoleranzen
This European Standard was approved by CEN on 10 February 2008.
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 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 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.
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. EN 754-8:2008: E
worldwide for CEN national Members.

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EN 754-8:2008 (E)
Contents Page
Foreword.3
1 Scope.5
2 Tolerances on dimensions .6
2.1 General.6
2.2 Diameter - Round tube .6
2.3 Width, depth or width across flats - squares, rectangles, hexagons, octagons.8
2.4 Wall thickness variation (eccentricity) .8
2.5 Length.9
2.6 Squareness of cut ends .9
3 Tolerances on form.10
3.1 General.10
3.2 Straightness.10
3.3 Convexity–Concavity.11
3.4 Twist.11
3.5 Angularity.12
3.6 Corner and fillet radii.13
3.7 Depth of dents for round tubes.13
Annex A (informative) Wall thickness variation (eccentricity) .15
A.1 General.15
A.2 Specifying round tube sizes and tolerances .15
A.2.1 General.15
A.2.2 Wall thickness variation for tubes specified as OD ×××× t or ID ×××× t.15
A.2.3 Wall thickness variation for tubes specified as OD ×× ID .16
××
Bibliography .17

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EN 754-8:2008 (E)
Foreword
This document (EN 754-8:2008) 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 September 2008, and conflicting national standards shall
be withdrawn at the latest by September 2008.
This document supersedes EN 754-8:1998.
Within its programme of work, Technical committee CEN/TC 132 entrusted CEN/TC 132/WG 5 "Extruded
and drawn products" to revise EN 754-8:1998.
The following technical modifications have been introduced during the revision:
 Clause 1: Scope is clarified with respect to what is not included
 Clause 1: Alloy EN AW-5049, EN AW-6262A and EN AW-6065 are added
 Subclause 2.4 and Table 3: Requirements to wall thickness variation (eccentricity) is introduced
 Annex A: Informative Annex A is added explaining wall thickness variation (eccentricity)
EN 754 comprises the following parts under the general title "Aluminium and aluminium alloys — Cold
drawn rod/bar and tube":
 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
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.
CEN/TC 132 affirms it is its policy that in the case when a patentee refuses to grant licenses on
standardized standards products under reasonable and not discriminatory conditions then this product
shall be removed from the corresponding standard.
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EN 754-8:2008 (E)
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, 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 the United Kingdom.

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EN 754-8:2008 (E)
1 Scope
This document specifies the tolerances on dimensions and form for aluminium and aluminium alloy cold drawn
porthole tubes with an outside diameter (OD) from 3 mm to 350 mm (round tube, see Figure 1) or with a cross
section contained within a circumscribing circle (CD) from 8 mm to 300 mm (other than round tube, see Figure
2), supplied in straight lengths.
This document only applies to cold drawn tube for general engineering applications made in the following
alloys:
 EN AW-1050A, EN AW-1200;
 EN AW-3003, EN AW-3103;
 EN AW-5005, EN AW-5005A, EN AW-5049, EN AW-5251, EN AW-5052;
 EN AW-6012, EN AW-6060, EN AW-6061, EN AW-6262, EN AW-6262A;
 EN AW-6063, EN AW-6063A, EN AW-6065, EN AW-6082;
 EN AW-7020.
The temper designations used in this part are according to EN 515.
This document only applies to tube produced by the porthole/bridge method of extrusion only (and then cold
drawn to the final dimensions).
This document does not apply to:
 cold drawn tubes produced by the seamless, die/mandrel method (EN 754-7),
 tubes delivered in coils (EN 13958),
 coiled tubes cut to length (EN 13958).

Figure 1 — Round tube
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EN 754-8:2008 (E)

Figure 2 — Circumscribing circle for other than round tube
2 Tolerances on dimensions
2.1 General
When outside diameter OD, inside diameter ID, and wall thickness t, (or their equivalent dimensions in other
than round tube) are all specified, standard tolerances shall apply to any two of these dimensions, but not to
all three. As a result, the purchaser shall only state two nominal dimensions on any given order.
2.2 Diameter - Round tube
Mean diameter is defined as the average of two diameter measurements taken at right angles to each other at
any position along the length.
The tolerances on diameter are specified in Table 1.
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EN 754-8:2008 (E)

Table 1 — Tolerances on diameter for round tube
Dimensions in millimetres
Tolerance on diameter
Diameter (OD or ID)
Maximum allowable deviation of diameter
a
at any point from specified diameter
Maximum allowable deviation
Tempers O,
of mean diameter from
Non-annealed
e
Up to and Heat treated H111 and
specified diameter
Over and non heat
c
including tube Tx510
b
treated tube

d d d d
≥ 3 8 ± 0,04 ± 0 08 ± 0 12 ± 0 25
, , ,
8 18 ± 0,05 ± 0,09 ± 0,15 ± 0,30
18 30 ± 0,06 ± 0,10 ± 0,20 ± 0,40
30 50 ± 0,07 ± 0,12 ± 0,25 ± 0,50
50 80 ± 0,09 ± 0,15 ± 0,35 ± 0,70
80 120 ± 0,14 ± 0,20 ± 0,60 ± 1,2
120 200 ± 0,25 ± 0,40 ± 1,2 ± 2,4
200 350 ± 0,38 ± 0,60 ± 1,7 ± 3,4
a
Not applicable to tubes having a wall thickness less than 2,5 % of the specified outside diameter. The tolerance for tubes with
wall thickness less than 2,5 % of the specified outside diameter shall be determined by multiplying the applicable tolerance as
follows:
- wall thickness over 2,0 % up to and including 2,5 % of outside diameter : 1,5 x tolerance;
- wall thickness over 1,5 % up to and including 2,0 % of outside diameter : 2,0 x tolerance;
- wall thickness over 1,0 % up to and including 1,5 % of outside diameter : 3,0 x tolerance;
- wall thickness over 0,5 % up to and including 1,0 % of outside diameter : 4,0 x tolerance.
b
Applies to all alloys in H1x, H2x, H3x tempers, and to alloy EN AW-6063 in the T832 temper.
c
Applies to all alloys in T3, T4, T6, T66, T73, T8, T9 and Tx511 tempers.
d
This tolerance applies
...