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Aluminium 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 suited to welding and can be easily anodised. Most commonly available as T6 temper, in the T4 condition it has good formability.


This material is used for architectural applications, shop fittings, irrigation tubing, balustrading, window frames, extrusions and doors

Supplied Forms

  • Extrusions
  • Tube

Alloy Designations

Aluminium alloy 6063/6063A also corresponds to: 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 and HE19.

Temper Types

The most common tempers 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.


  • Solderability: Good
  • Weldability - Gas: Excellent
  • Weldability - Arc: Excellent
  • Weldability - Resistance: Excellent
  • Brazability: Excellent
  • Workability - Cold: Average
  • Machinability: Average

Chemical Compositions

Element % Present
Manganese (Mn) 0.00 - 0.10
Iron (Fe) 0.00 - 0.35
Magnesium (Mg) 0.45 - 0.90
Silicon (Si) 0.20 - 0.60
Zinc (Zn) 0.00 - 0.10
Titanium (Ti) 0.00 - 0.10
Chromium (Cr) 0.00 - 0.10
Copper (Cu) 0.00 - 0.10
Aluminium (Al) Balance

Mechanical properties at room temperature

Property Value
Proof Stress 160 MPa
Tensile Strength 195 MPa
Elongation 14%
Shear Strength 150 MPa
Hardness Vickers 80 HV
Properties above are for material in the T6 condition

Reference data for some physical properties (for guidance only)

Property Value
Density 2.70 Kg/m3
Melting Point 600 °C
Thermal Expansion 23.5 x 10-6 /K
Modulus of Elasticity 69.5 GPa
Thermal Conductivity 200W/m.K
Electrical Resistivity 0.035 x 10-6 Ω .m


thyssenkrupp Materials (UK) Ltd
Cox’s Lane
Cradley Heath
West Midlands
B64 5QU

Important Note

Information given in this data sheet about the condition or usability of materials respectively products are no warranty for their properties, but act as a description. The information, we give on for advice, comply to the experiences of the manufacturer as well as our own. We cannot give warranty for the results of processing and application of the products.

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