Data Sheets

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.

Applications
6063 is typically used in:
Architectural applications
Extrusions
Window frames
Doors
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.

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

Chemical Composition

BS EN 573-3: 2009 Alloy 6063
Chemical Element	% Present
Aluminium (Al)	balance
Other (Each)	0.05 max
Manganese (Mn)	0.1 max
Zinc (Zn)	0.1 max
Titanium (Ti)	0.1 max
Chromium (Cr)	0.1 max
Copper (Cu)	0.1 max
Others (Total)	0.15 max
Iron (Fe)	0.35 max
Silicon (Si)	0.2 - 0.6
Magnesium (Mg)	0.45 - 0.9

Alloy Designations

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

AA6063

Al Mg0.7Si

GS10

AlMgSi0.5

A-GS

3.32206

ASTM B210

ASTM B221

ASTM B241 (Pipe- Seamless)

ASTM B345 (Pipe- Seamless)

ASTM B361

ASTM B429

ASTM B483

ASTM B491

MIL G-18014

MIL G-18015

MIL P-25995

MIL W-85

QQ A-200/9

SAE J454

UNS A96063

HE19

Temper Types

The most common tempers for 6063 aluminium are:

O
T6

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
Bar
Rod

Generic Physical Properties


Physical Property	Value
Density	2.70 g/cm³
Melting Point	655 °C
Thermal Expansion	23.5 x10^-6 /K
Modulus of Elasticity	69.5 GPa
Thermal Conductivity	201 W/m.K
Electrical Resistivity	52 % IACS
Electrical Resistivity	0.033 x10^-6 Ω .m

Mechanical Properties

To BS EN 755-2: 2008 Rod & Bar - Up To 150mm Dia. & A/F
Mechanical Property	Value
Proof Stress	170 Min MPa
Tensile Strength	215 Min MPa
Elongation A50 mm	8 Min %
Hardness Brinell	75 HB
Elongation A	10 Min %

To BS EN 755-2: 2008 Rod & Bar - 150mm to 200mm Dia. & A/F
Mechanical Property	Value
Proof Stress	160 Min MPa
Tensile Strength	195 Min MPa
Hardness Brinell	75 HB
Elongation A	10 Min %

BS EN 755-2 Tube - Up To 25mm Wall Thickness
Mechanical Property	Value
Proof Stress	170 Min MPa
Tensile Strength	215 Min MPa
Elongation A50 mm	8 Min %
Hardness Brinell	75 HB
Elongation A	10 Min %

BS EN 755-2:2008 Profiles - Up to 10mm Wall Thickness
Mechanical Property	Value
Proof Stress	170 Min MPa
Tensile Strength	215 Min MPa
Elongation A50 mm	6 Min %
Hardness Brinell	75 HB
Elongation A	8 Min %

BS EN 755-2:2008 Profiles - 10mm to 25mm Wall Thickness
Mechanical Property	Value
Proof Stress	160 Min MPa
Tensile Strength	195 Min MPa
Elongation A50 mm	6 Min %
Hardness Brinell	75 HB
Elongation A	8 Min %

The Properties listed above are for material in the T6 condition

Weldability

Alloy 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: Good

Weldability – Arc: Very Good

Weldability – Resistance: Good

Brazability: Very Good

Solderability: Good

Fabrication

Workability - Cold: Average (Acceptable)

Machinability: Good