Aluminium, Commercial Alloy6063 O Bar & Extrusion

One of the most popular alloys in the 6000 series and most widely known as an architectural alloy.

Aluminium alloy 6063 is a medium strength alloy commonly referred to as an architectural alloy. It is normally used in intricate extrusions and is most commonly supplied in the T6 temper.

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Related Specifications

Aluminium alloy 6063/6063A also 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 temper for 6063 aluminium are:

  • T4
  • O
  • T6


Chemical Composition


  • 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
  • Hydro formed tube for chassis


  • High corrosion resistance
  • Medium strength
  • Good surface finish
  • Readily suited to welding
  • Easily anodised
  • Good formability in the T4 condition

Additional Information


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