ISO 6362-6:2025 PDF

Wrought aluminium and aluminium alloys — Extruded rods/bars, tubes and profiles — Part 6: Tolerances on form and dimensions for round, square, rectangular and hexagonal tubes

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Title (English):

ISO 6362-6:2025

Wrought aluminium and aluminium alloys — Extruded rods/bars, tubes and profiles — Part 6: Tolerances on form and dimensions for round, square, rectangular and hexagonal tubes

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 17
Publication date:: March 28, 2025
Edition:: ISO IS 6362 edition 2 version 1
ICS:: 23.040.15

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Description (English):

This document specifies the tolerances on form and dimensions of the following: — wrought aluminium and aluminium alloy extruded round tubes, having diameters from 13 mm up to 450 mm. — wrought aluminium and aluminium alloy extruded square, rectangular and hexagonal tubes, having circumscribing circle up to 350 mm in diameter. This document is applicable to extruded round, square, rectangular and hexagonal tubes. Four-digit numerical designations are in line with the Registration of International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys (known as "Teal sheets").[1]

Technical details

Technical committee: ISO/TC 79/SC 6 - Wrought aluminium and aluminium alloys
SKU: ISO 6362-6:2025

Abstract

Overview

ISO 6362-6:2025 - Wrought aluminium and aluminium alloys - Extruded rods/bars, tubes and profiles - Part 6 - specifies tolerances on form and dimensions for extruded aluminium tubes with round, square, rectangular and hexagonal cross-sections. The standard applies to extruded round tubes with diameters from 13 mm to 450 mm and to square, rectangular and hexagonal tubes with a circumscribing circle up to 350 mm. Alloy designations follow the four‑digit system in the Registration of International Alloy Designations (the “Teal sheets”).

Key technical topics and requirements

Scope and material groups: Divides commonly used wrought alloys into Group I and Group II with separate tolerances; different rules for seamless and porthole extruded tubes.
Dimensional tolerances:
- Round tube diameter tolerances by size and alloy group (examples from the standard: for D = 13–25 mm, maximum deviation at any point ±0.51 mm for Group I and ±0.76 mm for Group II).
- Width/depth/width‑across‑flats tolerances for non‑round tubes with size bands and multipliers for very thin walls.
- Rule: when outside diameter (DO), inside diameter (DI) and wall thickness (t) are specified, only two of these shall be stated on an order; standard tolerances apply to any two, not all three.
Wall thickness and eccentricity: Tolerances on wall thickness for round and non‑round tubes, including separate provisions for wall‑thickness variation (eccentricity) for seamless and porthole tubes.
Form tolerances: Straightness, convexity/concavity (square & rectangular), twist, angularity, corner and fillet radii, depth of dents for round tubes, and squareness of cut ends.
Special conditions: Exceptions for tempers (e.g., O and T_510), agreement requirements for sizes outside the tables, and multipliers for wall thickness below 2.5% of the outside dimension.

Practical applications and users

ISO 6362-6:2025 is essential for:

Extrusion manufacturers and process engineers - to set production tolerances and tooling.
Quality inspectors and metrology labs - to verify compliance with dimensional and form tolerances.
Purchasing and procurement teams - to prepare unambiguous orders (noting the two‑dimension rule).
Designers and structural engineers - to ensure fit, assembly and performance when specifying extruded aluminium tubes for applications such as architectural framing, transport, heat exchangers and structural components.

Related standards

ISO 6362 series (other parts cover inspection, mechanical properties and other profile types).
ISO 6362-1 - Technical conditions for inspection and delivery (normative reference for Part 6).

Keywords: ISO 6362-6:2025, wrought aluminium, extruded tubes, tolerances, round tubes, square tubes, wall thickness, eccentricity, porthole tubes, seamless tubes, Teal sheets.

Related standards

Mentioned in the description and other ISO standards

Abstract

Overview

Key technical topics and requirements

Scope and material groups: Divides commonly used wrought alloys into Group I and Group II with separate tolerances; different rules for seamless and porthole extruded tubes.
Dimensional tolerances:
- Round tube diameter tolerances by size and alloy group (examples from the standard: for D = 13–25 mm, maximum deviation at any point ±0.51 mm for Group I and ±0.76 mm for Group II).
- Width/depth/width‑across‑flats tolerances for non‑round tubes with size bands and multipliers for very thin walls.
- Rule: when outside diameter (DO), inside diameter (DI) and wall thickness (t) are specified, only two of these shall be stated on an order; standard tolerances apply to any two, not all three.
Wall thickness and eccentricity: Tolerances on wall thickness for round and non‑round tubes, including separate provisions for wall‑thickness variation (eccentricity) for seamless and porthole tubes.
Form tolerances: Straightness, convexity/concavity (square & rectangular), twist, angularity, corner and fillet radii, depth of dents for round tubes, and squareness of cut ends.
Special conditions: Exceptions for tempers (e.g., O and T_510), agreement requirements for sizes outside the tables, and multipliers for wall thickness below 2.5% of the outside dimension.

Practical applications and users

ISO 6362-6:2025 is essential for:

Extrusion manufacturers and process engineers - to set production tolerances and tooling.
Quality inspectors and metrology labs - to verify compliance with dimensional and form tolerances.
Purchasing and procurement teams - to prepare unambiguous orders (noting the two‑dimension rule).
Designers and structural engineers - to ensure fit, assembly and performance when specifying extruded aluminium tubes for applications such as architectural framing, transport, heat exchangers and structural components.

Related standards

ISO 6362 series (other parts cover inspection, mechanical properties and other profile types).
ISO 6362-1 - Technical conditions for inspection and delivery (normative reference for Part 6).

Keywords: ISO 6362-6:2025, wrought aluminium, extruded tubes, tolerances, round tubes, square tubes, wall thickness, eccentricity, porthole tubes, seamless tubes, Teal sheets.

ISO 6362-6:2025 PDF

Technical details

Abstract

Overview

Key technical topics and requirements

Practical applications and users

Related standards

Related standards

Abstract

Overview

Key technical topics and requirements

Practical applications and users

Related standards

Related standards

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