gr5 titanium alloy pipe standard: astm b 337/338,astm b 861/862 origine: Baoji city,Shaanxi,China Grade: Gr5, ... , gr2, gr3, gr5 (ti-6al-4V), gr7, gr9, gr122. Standard: ASTM b337, ASTM b338, ASTM b8613. Production description:1) size: Outer diameter: 3-300mm2 ...