Titanium Tubes: Grade:GR1,GR2,GR5(Ti6AL4V),GR7,GR12 Standard:ASTM AMSE Outer Dia:4mm~320mm, L< 15m Wall Thickness:0. Titanium Tubes: Grade:GR1,GR2 ... ,GR5(Ti6AL4V),GR7,GR12 Standard:ASTM Outer Dia:4mm~320mm, L< 15m ... tubes and pipe:Material:Gr1, Gr2, Gr3, Gr4, Gr5, Gr7, Gr9, Gr11, Gr12 , Gr23,TI6AL4V ELI etc. Standard: ASTM B337/338 AMSE ...