SIST EN 754-6:2008
(Main)Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 6: Hexagonal bars, tolerances on dimensions and form
General Information
- Abstract
This document specifies the tolerances on dimensions and form for aluminium and aluminium alloy cold drawn hexagonal bars having widths across flats in the range from 3 mm up to and including 80 mm.
The temper designations used in this part are according to EN 515.
- Status
- Published
- Publication Date
- 03-Apr-2008
- Technical Committee
- INEK - Nonferrous metals
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 27-Mar-2008
- Due Date
- 01-Jun-2008
- Completion Date
- 04-Apr-2008
Overview
SIST EN 754-6:2008 is a European standard developed by CEN that specifies the tolerances on dimensions and form for cold drawn hexagonal bars made from aluminium and aluminium alloys. This standard applies to hexagonal bars with widths across flats ranging from 3 mm up to and including 80 mm. It supports industries requiring precise specifications for aluminium shapes, ensuring consistent quality for manufacturers and end-users.
The temper designations referenced in this standard comply with EN 515, which defines the mechanical properties of wrought aluminium products. SIST EN 754-6:2008 is part of the wider EN 754 series that standardizes cold drawn rods, bars, and tubes for aluminium products.
Key Topics
Dimensional Tolerances
Width Across Flats: The standard provides detailed permissible deviations for width across flats across various size ranges. For example:
- Up to 6 mm: tolerance of -0.08 mm
- Up to 80 mm: tolerance up to -0.30 mm depending on size category
Corner Radii: Maximum corner radius is defined for different size ranges to maintain uniform hexagonal shape precision:
- 3 to 8 mm: max radius 0.2 mm
- Up to 80 mm: radius increases progressively to a maximum of 0.8 mm
Length Tolerances: When fixed lengths are specified, tolerance depends on the length category:
- For lengths ≤ 2,000 mm: +5 mm / 0 mm
- Between 2,000 to 5,000 mm: +7 mm / 0 mm
- Over 5,000 mm: +10 mm / 0 mm
Without fixed length agreement, bars may be supplied in random lengths as negotiated.
Squareness of Cut Ends: The squareness deviation must lie within half the fixed length tolerance, ensuring clean, precise cuts suitable for further processing.
Form Tolerances
Straightness: The standard sets limits on straightness deviations measured along the bar length. For bars ≥ 10 mm width across flats, a maximum allowed deviation of 2 mm per meter length and a localized kink of 0.6 mm per 300 mm length are specified.
Convexity and Concavity: These are controlled within the width across flats tolerances to maintain proper hexagonal geometry.
Twist: Twist tolerance is defined per 1,000 mm of bar length, with values depending on size category:
- 10 to 30 mm: max total twist 2°
- 30 to 80 mm: max total twist 2.5°
Twist tolerances for bars below 10 mm width or certain temper conditions require special agreement.
Applications
SIST EN 754-6:2008 is essential for industries where precision aluminium hexagonal bars play a critical role, including:
- Mechanical engineering: Components requiring exact cross-sections for fitting and assembly
- Aerospace and automotive: Lightweight structural elements needing strict dimensional controls
- Construction: Architectural elements benefitting from uniform hexagonal profiles
- Manufacturing: Precision machining and extrusion of aluminium parts where form accuracy impacts downstream processes
This standard ensures interchangeability, high quality, and reliability of aluminium hexagonal bars across multiple sectors by defining consistent measurement and tolerance criteria.
Related Standards
- EN 515 - Aluminium and aluminium alloys - Wrought products - Temper designations; referenced for material temper specifics.
- EN 754 series covering various cold drawn aluminium rod/bar & tube products:
- Part 1: Inspection and delivery conditions
- Part 2: Mechanical properties
- Part 3: Round bars
- Part 4: Square bars
- Part 5: Rectangular bars
- Part 7: Seamless tubes
- Part 8: Porthole tubes
These related standards provide complementary specifications necessary for complete standardization across aluminium product shapes and properties.
By adhering to SIST EN 754-6:2008, suppliers and manufacturers of aluminium hexagonal bars ensure compliance with European quality and dimensional requirements, improving product consistency and customer confidence in critical engineering applications.
Relations
- Effective Date
- 01-May-2008
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
SIST EN 754-6:2008 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 6: Hexagonal bars, tolerances on dimensions and form". This standard covers: This document specifies the tolerances on dimensions and form for aluminium and aluminium alloy cold drawn hexagonal bars having widths across flats in the range from 3 mm up to and including 80 mm. The temper designations used in this part are according to EN 515.
This document specifies the tolerances on dimensions and form for aluminium and aluminium alloy cold drawn hexagonal bars having widths across flats in the range from 3 mm up to and including 80 mm. The temper designations used in this part are according to EN 515.
SIST EN 754-6:2008 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.
SIST EN 754-6:2008 has the following relationships with other standards: It is inter standard links to SIST EN 754-6:1998, SIST EN 754-1:2016, SIST EN 12392:2002, SIST EN 15088:2006, SIST EN 12514:2020, SIST EN 12392:2016, SIST EN 12392:2016+A1:2022, SIST EN 13480-8:2018, SIST EN 754-1:2008, SIST EN 1090-3:2008, SIST EN 12392:2025, SIST EN 1090-3:2019, SIST EN 14015:2005, SIST EN 13195:2010, SIST EN 13195:2014. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 754-6:2008 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2008
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SIST EN 754-6:1998
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Aluminium and aluminium alloys - Cold drawn rod/bar and tube - Part 6: Hexagonal bars,
tolerances on dimensions and form
Aluminium und Aluminiumlegierungen - Gezogene Stangen und Rohre - Teil 6:
Sechskantstangen, Grenzabmaße und Formtoleranzen
Aluminium et alliages d'aluminium - Barres et tubes étirés - Partie 6 : Barres
hexagonales, tolérances sur dimensions et forme
Ta slovenski standard je istoveten z: EN 754-6:2008
ICS:
77.150.10
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 754-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2008
ICS 77.150.10 Supersedes EN 754-6:1995
English Version
Aluminium and aluminium alloys - Cold drawn rod/bar and tube -
Part 6: Hexagonal bars, tolerances on dimensions and form
Aluminium et alliages d'aluminium - Barres et tubes étirés - Aluminium und Aluminiumlegierungen - Gezogene Stangen
Partie 6: Barres hexagonales, tolérances sur dimensions et und Rohre - Teil 6: Sechskantstangen, Grenzabmaße und
forme 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 754-6:2008: E
worldwide for CEN national Members.
Contents Page
Foreword.3
1 Scope.4
2 Tolerances on dimensions .4
2.1 Width across flats.4
2.2 Corner radii.4
2.3 Length.5
2.4 Squareness of cut ends .5
3 Tolerances on form.5
3.1 Straightness.5
3.2 Convexity - Concavity.6
3.3 Twist.6
Bibliography .8
Foreword
This document (EN 754-6:2008) 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 754-6:1995.
Within its programme of work, Technical Committee CEN/TC 132 entrusted CEN/TC 132/WG 5 "Extruded
and drawn products" to revise EN 754-6:1995
The following technical modifications have been introduced during the revision:
Only editorial changes to bring this part in line with the other parts of EN 754
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 del
...