AA 6063 is an aluminium alloy, with magnesium and silicon as alloying elements. The standard controlling it's composition is maintained by the Aluminum Association.
It has generally good mechanical properties and is heat treatable and weldable. It's similar to British aluminium alloy HE9.
Softwares require for fixture desing are Unigraphics, UG -GM Toolkit, CATIA V5, Auto CAD capabilities.
Checking fixtures design for BIW and plastic trims layout and detailing of Welding fixtures using GM Toolkit Design of BIW welding fixtures.
These are the common sizes. Is it mostly 1/8", 1/4", 3/8", 1/2", and 3/4"!
Sometimes also seen in some other size 5/16" and 5/8" steel plates.
Usually 4' x 8' or 4' x 10' are used.
The 5/16" is used in as CR or HRP&O and 5/8" always comes in as HR.