... ,TA7,TA9,TA10 TC4 TC6 TC11 GR1,GR2,GR3,GR5,GR7,GR12 2.Standard: GB/2965-2007 ASTM B348 ... 4)Moreover, we adopt ultrasonic testing to guarantee high quality.(5) Other available material:Gr1,GR2,GR3,GR4,GR5,GR23(6)specication:ASTM ... , best delivery and good quality is guaranteed.* high quality , competitive price.*advanced detection equipment such as :ultrasonic flaw detection,infra-red appratus ...