Dalsteel Metals Pty Limited

Data Sheets

Aluminium Alloy // Commercial Alloy // 6063 - '0' Extrusions

Chemical Element % Present

Spec: BS EN 573-3:2009

Alloy 6063

Manganese (Mn) 0.0 - 0.10
Iron (Fe) 0.0 - 0.35
Magnesium (Mg) 0.45 - 0.90
Silicon (Si) 0.20 - 0.60
Zinc (Zn) 0.0 - 0.10
Titanium (Ti) 0.0 - 0.10
Chromium (Cr) 0.0 - 0.10
Copper (Cu) 0.0 - 0.10
Other (Each) 0.0 - 0.05
Others (Total) 0.0 - 0.15
Aluminium (Al) Balance
Physical PropertyValue
Density 2.70 g/cm³
Melting Point 600 °C
Thermal Expansion 23.5 x10^-6 /K
Modulus of Elasticity 69.5 GPa
Thermal Conductivity 200 W/m.K
Electrical Resistivity 0.035 x10^-6 Ω .m
Mechanical PropertyValue

Spec: BS EN 755-2:2008

Rod & Bar - Up to 200mm Dia.

Tensile Strength 130 Max MPa
Elongation A50 mm 16 Min %
Hardness Brinell 25 HB
Elongation A 18 Min %
Mechanical PropertyValue

Spec: BS EN 755-2:2008

Tube - Up to 25mm Wall Thickness

Tensile Strength 130 Max MPa
Elongation A50 mm 16 Min %
Hardness Brinell 25 HB
Elongation A 18 Min %

Aluminium Alloy 6063
Aluminium alloy 6063 is a medium strength alloy commonly referred to as an architectural alloy. It is normally used in intricate extrusions.
It has a good surface finish, high corrosion resistance, is readily suited to welding and can be easily anodised. Most commonly available as T6 temper, in the T4 condition it has good formability.

6063 is typically used in:
Architectural applications
Window frames
Shop fittings
Irrigation tubing
In balustrading the rails and posts are normally in the T6 temper and formed elbows and bends are T4. T4 temper 6063 aluminium is also finding applications in hydroformed tube for chassis.

Aluminium Alloy 6063A
Aluminium alloy 6063A is a variation of 6063 with greater strength but retains the same good surface finish qualities and affinity for anodising.

6063A is used in the same applications as 6063. It is also used in:
Road transport
Rail transport
Extreme sports equipment

Alloy Designations

Aluminium alloy 6063/6063A also corresponds to the following standard designations and specifications but may not be a direct equivalent:


Al Mg0.7Si







ASTM B241 (Pipe- Seamless)

ASTM B345 (Pipe- Seamless)





MIL G-18014

MIL G-18015

MIL P-25995

MIL W-85

QQ A-200/9

SAE J454

UNS A96063


Temper Types

The most common temper for 6063 aluminium are:

  • O - Soft
  • T4 - Solution heat treated and naturally aged to a substantially stable condition
  • T6 - Solution heat treated and artificially aged

Supplied Forms

Alloy 6063 is supplied as standard extrusions including tee, channel, angle and flat bar as well as box section and tube

  • Extrusions
  • Tube


6063 is suitable for all conventional welding methods.

Welding wire generally should be alloy 5183 or alloy 4043.

When maximum electrical conductivity is required use alloy 4043.

For strength and conductivity use alloy 5346 and increase the size of the weld to compensate for the lower conductivity.


Weldability – Gas: Excellent

Weldability – Arc: Excellent

Weldability – Resistance: Excellent

Brazability: Excellent

Solderability: Good


Workability - Cold: Average

Machinability: Average



This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon.

Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.

The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed & online) and manufacturers’ data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources.

Material supplied by the Company may vary significantly from this data, but will conform to all relevant and applicable standards.

As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied.

Advice given by the Company to any third party is given for that party’s assistance only and without liability on the part of the Company. All transactions are subject to the Company’s current Conditions of Sale. The extent of the Company’s liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.

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