Adhered to the principle of " quality first and integrity management ", and also cooperated with the northwest nonferrous metal research institute, our products have reached the advanced standard both in domestic and international. 1. Material: Grade1, 2, Grade5(TI-6AL-4V), Grade 9 2. Standard: ASTM, AMS, MIL, ASTM F67 , ASTM F136 ELI