Stainless Steel 304 is a general purpose, chrome-nickel type stainless steel that offers good formability and good weldability.  Excellent stability and shock resistance in many different corrosive and atmospheric conditions.  A general purpose stainless steel that is widely used in many different applications and industries.

Aluminum 6063 is generally considered to be an extrusion alloy that is heat treatable for strengthening.  Commonly used in the manufacture of furniture, windows, stair rails, and in pipe railing, and architectural extrusions.  Machinability is considered to be average for this alloy.  The alloy is readily welded by all of the conventional methods.