ISO 6362-5:2022
(Main)Wrought aluminium and aluminium alloys - Extruded rods/bars, tubes and profiles - Part 5: Tolerances on form and dimensions for round, square and hexagonal bars
Wrought aluminium and aluminium alloys - Extruded rods/bars, tubes and profiles - Part 5: Tolerances on form and dimensions for round, square and hexagonal bars
This document specifies the tolerances on dimensions and shape of the following: - wrought aluminium and aluminium alloy extruded round bars, having diameters in the range from 8 mm up to 350 mm; - wrought aluminium and aluminium alloy extruded square and hexagonal bars, having widths across flats in the range from 10 mm up to 220 mm. It is applicable to extruded round, square and hexagonal bars.
Aluminium et alliages d'aluminium corroyés — Barres, tubes et profilés filés — Partie 5: Tolérances sur forme et dimensions pour barres rondes, carrées et hexagonales
General Information
Relations
Overview
ISO 6362-5:2022 - "Wrought aluminium and aluminium alloys - Extruded rods/bars, tubes and profiles - Part 5" - defines tolerances on form and dimensions for extruded round, square and hexagonal aluminium bars. It applies to round bars with diameters from 8 mm to 350 mm and square/hexagonal bars with widths across flats from 10 mm to 220 mm. The standard specifies dimensional limits, shape tolerances and measurement methods to ensure consistent quality for extruded aluminium products.
Key topics and technical requirements
- Dimensional tolerances: Diameter and width-across-flats tolerances are tabulated (Table 3) and vary by size and alloy group (Group I and Group II). Example ranges include ±0.22 mm for small Group I bars (8–18 mm) up to ±3.00 mm for large Group II round bars (320–350 mm).
- Alloy grouping: Alloys commonly used are classified into Group I and Group II (Tables 1–2) to reflect manufacturing difficulty and tolerance assignment.
- Circularity: For round bars, circularity is measured as the difference between maximum and minimum diameters in a cross-section and is included within the diameter tolerance.
- Corner radii: Maximum corner radii for square and hexagonal bars are specified (Table 4) according to width across flats.
- Fixed-length and squareness tolerances: Fixed-length tolerances and squareness of cut ends are given (Table 5); squareness tolerances are limited to half the fixed-length tolerance range.
- Form tolerances: Straightness (Table 6), convexity/concavity, twist (Table 7) and squareness for square bars (Table 8) are defined. Measurements are taken with the bar supported on a horizontal base plate to minimize deviation. Note: form tolerances do not apply to tempers H111, H112, O and TX510 (Clause 6.1).
- Measurement guidance: The standard includes measurement positions and diagrams for straightness, twist and squareness to ensure repeatable inspection.
Applications and who uses this standard
ISO 6362-5 is essential for:
- Aluminium extruders and mills specifying and supplying extruded bars.
- Quality assurance and inspection teams performing dimensional and form checks.
- Product designers and mechanical engineers who need guaranteed tolerances for fit, assembly and machining.
- Buyers and procurement professionals creating technical purchase specifications for aluminium stock.
- Industries using extruded bars in construction, automotive components, architectural profiles, and machining stock.
Using this standard helps reduce rejects, ensure interchangeability, and streamline supplier–customer technical communication.
Related standards
- ISO 6362-1 - Technical conditions for inspection and delivery (referenced normative).
- ISO 6362-7 - Chemical composition of wrought aluminium alloys (alloys listed).
- The document also cross-references industry alloy designation resources (Aluminum Association “Teal sheets”).
Keywords: ISO 6362-5, tolerances, wrought aluminium, extruded bars, round bars, square bars, hexagonal bars, dimensional tolerances, form tolerances, straightness, twist, circularity, corner radii.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 6362-5
Fourth edition
2022-07
Wrought aluminium and aluminium
alloys — Extruded rods/bars, tubes
and profiles —
Part 5:
Tolerances on form and dimensions
for round, square and hexagonal bars
Aluminium et alliages d'aluminium corroyés — Barres, tubes et
profilés filés —
Partie 5: Tolérances sur forme et dimensions pour barres rondes,
carrées et hexagonales
Reference number
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
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 Tolerances on diameter and width across flats . 2
5.2 Circularity of round bars . 2
5.3 Corner radii of square and hexagonal bars . 3
5.4 Fixed-length tolerances . 3
5.5 Squareness of cut ends . 3
6 Tolerances on form . 3
6.1 General . 3
6.2 Straightness tolerances . 3
6.3 Convexity/concavity . 4
6.4 Twist tolerances . 4
6.5 Squareness for square bars . 5
Bibliography . 7
iii
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.
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
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
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 fourth edition cancels and replaces the third edition (ISO 6362-5:2012), which has been technically
revised. The main changes are as follows:
— in Clause 4, Table 1 has been separated into Table 1 and Table 2 by alloy group;
— in Clause 4, alloy 6026 has been added to Table 1 and alloy 2033 has been added to Table 2;
— 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 6362-5:2022(E)
Wrought aluminium and aluminium alloys — Extruded
rods/bars, tubes and profiles —
Part 5:
Tolerances on form and dimensions for round, square and
hexagonal bars
1 Scope
This document specifies the tolerances
...
Frequently Asked Questions
ISO 6362-5:2022 is a standard published by the International Organization for Standardization (ISO). Its full title is "Wrought aluminium and aluminium alloys - Extruded rods/bars, tubes and profiles - Part 5: Tolerances on form and dimensions for round, square and hexagonal bars". This standard covers: This document specifies the tolerances on dimensions and shape of the following: - wrought aluminium and aluminium alloy extruded round bars, having diameters in the range from 8 mm up to 350 mm; - wrought aluminium and aluminium alloy extruded square and hexagonal bars, having widths across flats in the range from 10 mm up to 220 mm. It is applicable to extruded round, square and hexagonal bars.
This document specifies the tolerances on dimensions and shape of the following: - wrought aluminium and aluminium alloy extruded round bars, having diameters in the range from 8 mm up to 350 mm; - wrought aluminium and aluminium alloy extruded square and hexagonal bars, having widths across flats in the range from 10 mm up to 220 mm. It is applicable to extruded round, square and hexagonal bars.
ISO 6362-5:2022 is classified under the following ICS (International Classification for Standards) categories: 77.150.10 - Aluminium products. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 6362-5:2022 has the following relationships with other standards: It is inter standard links to ISO 19152-5:2025, ISO 6362-5:2012. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 6362-5:2022 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.








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