ISO 6362-4:2022

INTERNATIONAL ISO
STANDARD 6362-4
Third edition
2022-07
Wrought aluminium and aluminium
alloys — Extruded rods/bars, tubes
and profiles —
Part 4:
Tolerances on form and dimensions
for profiles
Aluminium et alliages d'aluminium corroyés — Barres, tubes et
profilés filés —
Partie 4: Tolérances sur forme et dimensions pour profilés
Reference number
© ISO 2022
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ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Materials . 1
5 Tolerances on form and dimensions .2
5.1 Dimensional tolerances . 2
5.2 Length . 10
5.3 Squareness of cut ends . 10
6 Tolerances on form .10
6.1 General . 10
6.2 Straightness . 10
6.3 Convexity/concavity . 11
6.4 Curved cross-section or contour .12
6.5 Twist . 14
6.6 Angularity . 15
6.7 Corner and fillet radii . 16
Bibliography .18
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 79, Light metals and their alloys,
Subcommittee SC 6, Wrought aluminium and aluminium alloys.
This third edition cancels and replaces the second edition (ISO 6362-4:2012), which has been technically
revised. The main changes are as follows:
— errors have been corrected and expressions modified throughout.
A list of all parts in the ISO 6362 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
INTERNATIONAL STANDARD ISO 6362-4:2022(E)
Wrought aluminium and aluminium alloys — Extruded
rods/bars, tubes and profiles —
Part 4:
Tolerances on form and dimensions for profiles
1 Scope
This document specifies the tolerances on dimensions and shape of wrought aluminium and aluminium
alloy extruded profiles with a cross-section contained within a circumscribing circle not greater than
800 mm.
It is applicable to extruded profiles for general engineering applications only.
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.
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 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
circumscribing circle
smallest circle which encloses entirely the cross-section of the shape
Note 1 to entry: This dimension may have to be increased when shapes are subjected to corrections of the uneven
thickness or in the case of hollow shapes for which the centre of the circumscribing circle needs to be considered,
based on the void. These matters should be confirmed with the supplier beforehand as required.
4 Materials
Alloys mentioned in this document are listed in ISO 6362-7.
NOTE Four-digit numerical designations are completely identical with Registration of International Alloy
Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys (known
[1]
as “Teal sheets”) .
For the purposes of this document, wrought aluminium and aluminium alloys are divided into two
groups, which correspond to varying difficulty when manufacturing the products.
The division of the most commonly alloys used in general engineering into Group I and Group II is
specified in Table 1 and Table 2, respectively.
Grouping of other alloys is subject to agreement between the purchaser and the supplier.
Table 1 — Alloy Group I
Alloy system Alloy number
Pure aluminium 1070, 1070A, 1060, 1050, 1050A, 1100, 1200, 1350
Al-Mn system alloy 3021, 3003, 3102, 3103, 3203
Al-Mg system alloy 5005, 5005A, 5051A, 5251
Al-Mg-Si system alloy 6005, 6005A, 6005C, 6008, 6012, 6014, 6018, 6023, 6060, 6061, 6063, 6063A, 6065,
6081, 6082, 6182, 6101, 6101A, 6101B, 6106, 6110A, 6261, 6262, 6262A, 6351, 6360, 6463
Table 2 — Alloy Group II (all aluminium alloys except those given in alloy Group I)
Alloy system Alloy number
Al-Mg system alloy 5019, 5049, 5052, 5083, 5086, 5154A, 5454, 5754
Al-Cu-Mg system alloy 2007, 2014, 2014A, 2017, 2017A, 2024, 2030
Al-Zn-Mg system alloy 7204, 7003, 7005, 7020, 7021, 7022, 7049A, 7050, 7075, 7108, 7108A
5 Tolerances on form and dimensions
5.1 Dimensional tolerances
Tolerances on dimensions (see Figures 1 and 2) are specified in Tables 3 to 5.
The tolerances to be applied to the sectional dimensions as shown in Figure 1, where the nominal
thickness of one wall is equal to or greater than three times the thickness of the other wall, t, shall be
agreed between the purchaser and the supplier, see Figure 1 b) to e).
The purchaser should specify whether ordinary or special tolerances are required.
In the case of angled shapes as shown in Figure 3, the tolerances shall be decided not on the base of the
length of dimension X, but on the base of the angle α (see 6.6).
Even when value Y in Figure 3 is equal to or greater than 75 % of value X, these tolerances are not
applied to the dimension X or Z. The tolerances for X and Y shall conform to the column corresponding
to space dimension Ci and Ce depending on the distance from the reference base.
a)
b) c) d) e)
Key
A to A dimensions of metallic parts except the thickness of wall surface at hollow place (B)
1 5
B to B thickness of wall surface at hollow place
1 4
C , C dimensions of empty space at opening
e i
D dimensions of empty space at hollow place
Figure 1 — Sectional dimensions

Key
α , α distance between specified point and root of let
1 2
Figure 2 — Definition of α , α on sectional dimensions
1 2
Figure 3 — Sectional dimensions
Table 3 — Tolerance (ordinary class) on sectional dimensions
Dimensions in millimetres
a
Tolerance
Metallic part Hollow part (where more than 25 % is hollow space, i.e. less than 75 % is metal)
b
(where 75 % or more is metal) C or C
i e
Dimension at
Diameter of
d
Metallic part other Thickness of Distance between specified point and root of let α
specified part
circumscribing
than that in the right wall surface at
circle
c
column hollow part
5 < α ≤ 15 15 < α ≤ 30 30 < α ≤ 60 60 < α ≤ 100 100 < α ≤ 150 150 < α ≤ 200
A , A B
1 2
Alloy Group I II I II I II I II I II I II I II I II
A ≤ 3,20 ±0,23 ±0,35 ±0,33 ±0,43 ±0,38 ±0,48 — — — — — — — —
3,20 < A ≤ 6,30 ±0,27 ±0,42 ±0,39 ±0,53 ±0,45 ±0,58 ±0,51 ±0,64 — — — — — —
6,30 < A ≤ 12,50 ±0,30 ±0,45 ±0,47 ±0,60 ±0,51 ±0,64 ±0,58 ±0,70 ±0,61 ±0,73 — — — —
12,50 < A ≤ 20,00 ±0,35 ±0,54 ±15 % ±20 % ±0,53 ±0,69 ±0,58 ±0,73 ±0,64 ±0,80 ±0,67 ±0,83 — — — —
but but
20,00 < A ≤ 25,00 ±0,38 ±0,57 ±0,60 ±0,75 ±0,64 ±0,80 ±0,70 ±0,86 ±0,77 ±0,91 ±0,89 ±1,0 — —
±2,3 ±3,4
250 ≤ D 25,00 < A ≤ 40,00 ±0,45 ±0,69 ±0,69 ±0,90 ±0,73 ±0,93 ±0,83 ±1,0 ±0,91 ±1,1 ±1,0 ±1,2 — —
max. max.
40,00 < A ≤ 50,00 ±0,54 ±0,80 ±0,79 ±1,0 ±0,83 ±1,1 ±0,99 ±1,2 ±1,1 ±1,3 ±1,2 ±1,4 ±1,4 ±1,7
±0,38 ±0,57
50,00 < A ≤ 100,00 ±0,92 ±1,4 min. min. ±1,1 ±1,5 ±1,2 ±1,6 ±1,5 ±1,9 ±1,7 ±2,1 ±2,0 ±2,4 ±2,3 ±2,7
100,00 < A ≤ 150,00 ±1,3 ±2,0 ±1,5 ±2,0 ±1,6 ±2,1 ±2,0 ±2,6 ±2,4 ±2,9 ±2,8 ±3,3 ±3,2 ±3,7
150,00 < A ≤ 200,00 ±1,7 ±2,5 ±1,8 ±2,5 ±2,0 ±2,7 ±2,6 ±3,3 ±3,0 ±3,7 ±3,6 ±4,2 ±4,1 ±4,7
200,00 < A ≤ 250,00 ±2,1 ±3,1 ±2,1 ±3,0 ±2,4 ±3,2 ±3,2 ±4,0 ±3,7 ±4,5 ±4,3 ±5,4 ±4,9 ±5,7
A ≤ 3,20 ±0,54 ±0,80 ±0,64 ±0,90 ±0,69 ±0,93 — — — — — — — —
3,20 < A ≤ 6,30 ±0,57 ±0,84 ±0,67 ±0,92 ±0,76 ±1,0 ±0,89 ±1,1 — — — — — —
6,30 < A ≤ 12,50 ±0,62 ±0,92 ±0,71 ±0,99 ±0,82 ±1,1 ±0,95 ±1,2 ±1,5 ±1,7 — — — —
12,50 < A ≤ 20,00 ±0,65 ±0,96 ±20 % ±20 % ±0,78 ±1,1 ±0,93 ±1,2 ±1,3 ±1,6 ±1,7 ±2,0 — — — —
but but
20,00 < A ≤ 25,00 ±0,69 ±1,0 ±0,81 ±1,1 ±1,0 ±1,3 ±1,6 ±1,8 ±2,0 ±2,3 ±2,7 ±2,9 — —
±3,4 ±3,4
250 < D ≤ 800 25,00 < A ≤ 40,00 ±0,72 ±1,1 ±0,85 ±1,2 ±1,2 ±1,5 ±1,9 ±2,2 ±2,3 ±2,6 ±3,0 ±3,2 — —
max. max.
40,00 < A ≤ 50,00 ±0,92 ±1,4 ±1,2 ±1,6 ±1,5 ±1,9 ±2,2 ±2,6 ±2,6 ±3,0 ±3,3 ±3,6 ±4,6 ±4,9
±0,57 ±0,95
50,00 < A ≤ 100,00 ±1,3 ±2,0 min. min. ±1,6 ±2,2 ±1,8 ±2,4 ±2,5 ±3,1 ±2,9 ±3,4 ±3,6 ±4,1 ±4,9 ±5,4
100,00 < A ≤ 150,00 ±1,7 ±2,5 ±1,9 ±2,7 ±2,2 ±2,9 ±2,9 ±3,6 ±3,2 ±3,9 ±3,8 ±4,5 ±5,2 ±5,8
150,00 < A ≤ 200,00 ±2,1 ±3,1 ±2,3 ±3,2 ±2,5 ±3,5 ±3,2 ±4,0 ±3,5 ±4,3 ±4,1 ±4,9 ±5,4 ±6,2
200,00 < A ≤ 250,00 ±2,4 ±3,7 ±2,6 ±3,8 ±2,9 ±4,0 ±3,5 ±4,5 ±3,8 ±4,7 ±4,4 ±5,4 ±5,7 ±6,6

Table 3 (continued)
a
Tolerance
Metallic part Hollow part (where more than 25 % is hollow space, i.e. less than 75 % is metal)
b
(where 75 % or more is metal) C or C
i e
Dimension at
Diameter of
d
Metallic part other Thickness of Distance between specified point and root of let α
specified part
circumscribing
than that in the right wall surface at
circle
c
column hollow part
5 < α ≤ 15 15 < α ≤ 30 30 < α ≤ 60 60 < α ≤ 100 100 < α ≤ 150 150 < α ≤ 200
A , A B
1 2
Alloy Group I II I II I II I II I II I II I II I II
250,00 < A ≤ 300,00 ±2,8 ±4,2 ±3,0 ±4,3 ±3,2 ±4,5 ±3,8 ±5,0 ±4,1 ±5,2 ±4,7 ±5,8 ±6,0 ±7,0
300,00 < A ≤ 350,00 ±3,2 ±4,8 ±20 % ±20 % ±3,3 ±4,8 ±3,6 ±5,0 ±4,1 ±5,5 ±4,4 ±5,6 ±5,0 ±6,3 ±6,2 ±7,4
but but
350,00 < A ≤ 400,00 ±3,6 ±5,4 ±3,7 ±5,4 ±3,9 ±5,5 ±4,5 ±5,9 ±4,7 ±6,0 ±5,3 ±6,7 ±6,5 ±7,8
±3,4 ±3,4
250 < D ≤ 800 400,00 < A ≤ 450,00 ±4,0 ±5,9 ±4,1 ±5,9 ±4,3 ±6,0 ±4,8 ±6,4 ±5,0 ±6,5 ±5,6 ±7,2 ±6,8 ±8,2
max. max.
450,00 < A ≤ 500,00 ±4,4 ±6,5 ±4,4 ±6,4 ±4,6 ±6,5 ±5,1 ±6,9 ±5,3 ±6,9 ±5,9 ±7,6 ±7,1 ±8,6
±0,57 ±0,95
500,00 < A ≤ 550,00 ±4,7 ±7,1 min. min. ±4,8 ±7,0 ±4,9 ±7,1 ±5,4 ±7,4 ±5,6 ±7,4 ±6,2 ±8,1 ±7,3 ±9,0
550,00 < A ≤ 800,00
...