seamless titanium tube Material: GR1.GR2, GR3,GR5,GR9 Standard:ASTM B338 ASTM B861A Certificate: ISO SGS CE ABS seamless titanium tube A. Grade, Status, Specifications. Grade Supply StatusTechnologyOuter Diameter (mm)Wall Thickness (mm) Gr1 Gr2 Gr4 Gr5 Gr9 Annealed (M) Seamless Cold-rolled Cold-drawn >10~15 0.5~2.5 >15~20 0.6~3.0 >20~30 0.6~3.5 >30~40 1.0~4.0 >40~50 1.5~4.5 >50~60 2.0~4.5 >60~80 ...