... ,GR4,GR5,Ti6Al4V,GR7,GR9,GR11,GR12,GR23,Ti6al7Nb,Ti153333StandardGB/T 13810-2007,GB/T2965-2007ASTM B348,ASTM F67,ASTM F136 ... .300.300.50Oxygen, max0.180.250.350.40Titaniumbalancebalancebalancebalance Mechanical requirementsannealed-bar, billet, forgings, and oher formsgradeTensile strengthminYield strength,0.2%Offset ...