ISO 6362-6:2012

INTERNATIONAL ISO
STANDARD 6362-6
First edition
2012-07-01
Wrought aluminium and aluminium
alloys — Extruded rods/bars, tubes and
profiles —
Part 6:
Round, square, rectangular and
hexagonal tubes — Tolerances on shape
and dimensions
Aluminium et alliages d’aluminium corroyés — Barres, tubes et
profilés filés —
Partie 6: Tubes ronds, carrés, rectangulaires et hexagonaux —
Tolérances sur forme et dimensions
Reference number
©
ISO 2012
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ii © ISO 2012 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3  Terms and definitions . 1
4 Materials . 1
5 Tolerances on dimensions . 2
5.1 General . 2
5.2 Tolerances on diameter for round tube . 3
5.3  Tolerances on width, depth or width across flats — Squares, rectangles, hexagons . 4
5.4 Tolerances on wall thickness for round tube . 6
5.5 Tolerances on wall thickness for tubes that are other than round . 7
5.6 Tolerances on wall thickness variation (eccentricity) — Round tube . 8
5.7 Tolerances on length of straight tube . 9
5.8 Squareness of cut ends .10
6 Tolerances on form .10
6.1 General .10
6.2 Straightness .10
6.3 Convexity/concavity — Square and rectangular tube . 11
6.4 Twist — Square and rectangular tube .12
6.5 Angularity — Square and rectangular tube .13
6.6  Corner and fillet radii — Square and rectangular tube .14
6.7 Depth of dents for round tube.14
Annex A (informative) Wall thickness variation (eccentricity) .15
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 6362-6 was prepared by Technical Committee ISO/TC 79, Light metals and their alloys, Subcommittee
SC 6, Wrought aluminium and aluminium alloys.
ISO 6362 consists of the following parts, under the general title Wrought aluminium and aluminium alloys —
Extruded rods/bars, tubes and profiles:
— Part 1: Technical conditions for inspection and delivery
— Part 2: Mechanical properties
— Part 3: Extruded rectangular bars — Tolerances on shape and dimensions
— Part 4: Profiles — Tolerances on shape and dimensions
— Part 5: Round, square and hexagonal bars — Tolerances on shape and dimensions
— Part 6: Round, square, rectangular and hexagonal tubes — Tolerances on shape and dimensions
— Part 7: Chemical composition
iv © ISO 2012 – All rights reserved

INTERNATIONAL STANDARD ISO 6362-6:2012(E)
Wrought aluminium and aluminium alloys — Extruded rods/
bars, tubes and profiles —
Part 6:
Round, square, rectangular and hexagonal tubes — Tolerances
on shape and dimensions
1 Scope
This part of ISO 6362 specifies the tolerances on dimensions and shape of wrought aluminium and aluminium
alloy extruded round bars having diameters in the range from 8 mm up to 350 mm; and square and hexagonal
bars having widths across flats in the range from 10 mm up to 220 mm.
It applies to extruded round, square and hexagonal bars.
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.
ISO 6362-1, Wrought aluminium and aluminium alloys — Extruded rods/bars, tubes and profiles — Part 1:
Technical conditions for inspection and delivery
3  Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6362-1 apply.
4 Materials
For the purposes of this part of ISO 6362, wrought aluminium and aluminium alloys are divided into two groups,
which correspond to varying 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 (for seamless tube) and Table 2 (for porthole tube). Grouping of other alloys is subject to agreement
between the purchaser and supplier.
Table 1 — Alloy group A (for seamless tube)
1070, 1050, 1050A, 1350, 1100, 1200
3102, 3003, 3103, 3203
Group I
5005, 5005A, 5051A
6101, 6101A, 6101B, 6005, 6005A, 6005C, 6008, 6014, 6060, 6360, 6063, 6063A, 6463
2007, 2011, 2011A, 2014, 2014A, 2017,2017A, 2024, 2030
5019, 5049, 5051, 5251, 5052, 5154, 5154A, 5454, 5754, 5056, 5083, 5086
Group II
6110A, 6012, 6018, 6351, 6061, 6261, 6262, 6081, 6082
7003, 7204, 7005, 7108, 7108A, 7020, 7021, 7022, 7049A, 7050, 7075
NOTE The four-digit numbers listed are taken from the Registration of International Alloy Designations and Chemical Composition
Limits for Wrought Aluminium Alloys, published by the Aluminum Association, 1525 Wilson Boulevard, Suite 600, Arlington, VA 22209,
USA (known as “Teal Sheets”).
Table 2 — Alloy group B (for porthole tube)
1070, 1050, 1050A, 1350, 1100, 1200
3102, 3003, 3103, 3203
Group I
5005, 5005A
6101, 6101A, 6101B, 6005, 6005A, 6005C, 6008, 6014, 6060, 6360, 6063, 6063A, 6463
5051, 5049, 5251, 5052
Group II 6110A, 6012, 6018, 6351, 6061, 6261, 6262, 6081, 6082
7003, 7005, 7108, 7108A, 7020
NOTE The four-digit numbers listed are taken from the Registration of International Alloy Designations and Chemical Composition
Limits for Wrought Aluminium Alloys, published by the Aluminum Association, 1525 Wilson Boulevard, Suite 600, Arlington, VA 22209,
USA (known as “Teal Sheets”).
5 Tolerances on dimensions
5.1 General
When outside diameter OD, inside diameter ID, and wall thickness t, 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.
For round tubes see Figure 1. For any tubes that are other than round, see Figure 2.
2 © ISO 2012 – All rights reserved

Key
ID inside diameter
OD outside diameter
Figure 1 — Round tube
Key
CD circumscribed diameter
Figure 2 — Circumscribing circle for tubes that are other than round
5.2 Tolerances on diameter for round tube
Tolerances on diameter for round tube shall be in accordance with Table 3.
Table 3 — Tolerances on diameter for round tube
Dimensions in millimetres
Diameter Tolerance on diameter for round tube
Maximum allowable deviation of Maximum allowable deviation of mean
OD or ID
b
diameter at any point from specified  diameter from specified diameter
a
diameter
c c c c
Alloy group I Alloy group II Alloy group I Alloy group II
13 ≤ OD or ID ≤ 25 ± 0,51 ± 0,76 ± 0,25 ± 0,38
25 < OD or ID ≤ 50 ± 0,64 ± 0,97 ± 0,30 ± 0,40
50 < OD or ID ≤ 100 ± 0,76 ± 1,14 ± 0,38 ± 0,58
100 < OD or ID ≤ 150 ± 1,27 ± 1,91 ± 0,64 ± 0,97
150 < OD or ID ≤ 200 ± 1,91 ± 2,87 ± 0,89 ± 1,35
200 < OD or ID ≤ 250 ± 2,54 ± 3,81 ± 1,14 ± 1,73
250 < OD or ID ≤ 300 ± 3,18 ± 4,78 ± 1,40 ± 2,11
300 < OD or ID ≤ 350 ± 3,81 ± 5,72 ± 1,65 ± 2,49
350 < OD or ID ≤ 400 ± 4,45 ± 6,68 ± 1,91 ± 2,87
400 < OD or ID ≤ 450 ± 5,08 ± 7,62 ± 2,16 ± 3,25
When the tolerance is specified only for either the plus or the minus side, the values in this table shall be doubled.
Tolerances on dimensions exceeding the specified range shall be agreed upon between the purchaser and the
supplier.
a
These values are not applied to the tubes of temper grade O, coiled tubes and tubes with wall thickness less than 2,5 % of the
specified outside diameter.
b
The mean diameter is defined as the average value of measurements made at two arbitrary points at right angles to each other.
c
Refer to Table 1.
5.3  Tolerances on width, depth or width across flats — Squares, rectangles, hexagons
5.3.1 Seamless tube
The tolerances on width, depth or width across flats for seamless tubes that are other than round are
specified in Table 4.
4 © ISO 2012 – All rights reserved

Table 4 — Tolerances on width, depth or width across flats for seamless tubes that are other than round
Dimensions in millimetres
Tolerances on width, depth or width across flats for seamless tubes that are other
a,b
than round
Width, depth or
width across flats CD ≤ 100 100 < CD ≤ 200 200 < CD ≤ 300 300 < CD ≤ 350
c
W Alloy group
I II I II I II I II
W ≤ 10 ± 0,25 ± 0,40 ± 0,30 ± 0,50 ± 0,35 ± 0,55 ± 0,40 ± 0,60
10 < W ≤ 25 ± 0,30 ± 0,50 ± 0,40 ± 0,70 ± 0,50 ± 0,80 ± 0,60 ± 0,90
25 < W ≤ 50 ± 0,50 ± 0,80 ± 0,60 ± 0,90 ± 0,80 ± 1,00 ± 0,90 ± 1,20
50 < W ≤ 100 ± 0,70 ± 1,00 ± 0,90 ± 1,20 ± 1,10 ± 1,30 ± 1,30 ± 1,60
50 < W ≤ 150 - - ± 1,10 ± 1,50 ± 1,30 ± 1,70 ± 1,50 ± 1,80
150 < W ≤ 200 - - ± 1,30 ± 1,90 ± 1,50 ± 2,20 ± 1,80 ± 2,40
200 < W ≤ 300 - - - - ± 1,70 ± 2,50 ± 2,10 ± 2,80
300 < W ≤ 350 - - - - - - ± 2,80 ± 3,50
a
Not applicable to tubes having a wall thickness less than 2,5 % of the specified outside width, depth or width across flats. The
tolerance for tubes with wall thickness less than 2,5 % of the specified width, depth or width across flats shall be determined by
multiplying the applicable tolerance as follows:
— wall thickness over 2,0 % up to and including 2,5 % of outside parameter: 1,5 × tolerance;
— wall thickness over 1,5 % up to and including 2,0 % of outside parameter: 2,0 × tolerance;
— wall thickness over 1,0 % up to and including 1,5 % of outside parameter: 3,0 × tolerance;
— wall thickness over 0,5 % up to and including 1,0 % of outside parameter: 4,0 × tolerance.
b
These tolerances do not apply to tempers O and Tx510. For these tempers, the tolerances shall be subject to agreement between
the supplier and purchaser.
c
Refer to Table 1.
5.3.2 Porthole tube
The tolerances on width, depth or width across flats for porthole tubes that are other than round are
specified in Table 5.
Table 5 — Tolerances on width, depth or width across flats for porthole tubes that are
other than round
Dimensions in millimetres
Tolerances on width, depth or width across flats for porthole tubes that are other
a,b
than round
Width, depth or
width across flats CD ≤ 100 100 < CD ≤ 200 200 < CD ≤ 300 300 < CD ≤ 350
c
W Alloy group
I II I II I II I II
W ≤ 10 ± 0,25 ± 0,40 ± 0,30 ±0,50 ± 0,35 ± 0,55 ± 0,40 ± 0,60
10 < W ≤ 25 ± 0,30 ± 0,50 ± 0,40 ± 0,70 ± 0,50 ± 0,80 ± 0,60 ± 0,90
25 < W ≤ 50 ± 0,50 ± 0,80 ± 0,60 ± 0,90 ± 0,80 ± 1,00 ± 0,90 ± 1,20
50 < W ≤ 100 ± 0,70 ± 1,00 ± 0,90 ± 1,20 ± 1,10 ± 1,30 ± 1,30 ± 1,60
50 < W ≤ 150 - - ± 1,10 ± 1,50 ± 1,30 ± 1,70 ± 1,50 ± 1,80
150 < W ≤ 200 - - ± 1,30 ± 1,90 ± 1,50 ± 2,20 ± 1,80 ± 2,40
200 < W ≤ 300 - - - - ± 1,70 ± 2,50 ± 2,10 ± 2,80
300 < W ≤ 350 - - - - - - ± 2,80 ± 3,50
a
Not applicable to tubes having a wall thickness less than 2,5 % of the specified outside width, depth or width across flats. The
tolerance for tubes with wall thickness less than 2,5 % of the specified width, depth or width across flats shall be determined by
multiplying the applicable tolerance as follows:
— wall thickness over 2,0 % up to and including 2,5 % of outside parameter: 1,5 × tolerance;
— wall thickness over 1,5 % up to and including 2,0 % of outside parameter: 2,0 × tolerance;
— wall thickness over 1,0 % up to and including 1,5 % of outside parameter: 3,0 × tolerance;
— wall thickness over 0,5 % up to and including 1,0 % of outside parameter: 4,0 × tolerance.
b
These tolerances do
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