titanium grade 5 bars:Standard: ASTM B348, F67, F136, ASME SB348 Grade: GR1, GR2, GR3, GR4, GR5, GR7, GR11 Titanium grade 5 bars :Size:25.5mm*2500~3000mmStandard: ASTMF136,ISO5832 ... % ultrasonic flaw detection checks inner defectsbelow 3mm,they can guarantee titanium bars quality both inner and outer;infrared detection apparatus measuresthe whole bar ...