> I am no sure what the 4v stands for and don't take my word for
   it, but
    > if the titanium has a 3 rather than a 6 the strenth is 90,000 (6 is
    > 160,000 4130 is 120,000.). I priced a 1 inch tube 60 inches long the
    > price was $550.00. There is a web site that sells cut ends much
   cheaper
    > (Titanium Joe www. titaniumjoe.com) about 1/5 the price.
    >
    > Welding Stanless requires an argon gas purge both side. The
   difference
    > with titanium is the gas coverage for titanium on the out side
   needs to
    > be larger so a standard tig cup will not work. You need a
   traliing purge
    > as well or in a box. The oxgen has to be below .1 % and should be 0.
    >
    > Harry

   Sounds like for small work you should convert your sand blasting cabinet
   to a tig cabinet :-))

   -dave


   --
   Best Regards /Mit freundlichen Gruessen,
   dave ( at ) arb.net http://arb.net

I believe the "V" is vanadium.
Jim Kidd