... -4V),Gr7,Gr9,Gr12, etc.StandardGB,ASTM, BS,BSW ,ISOAWS A5.16, ASTM B863, ASTM B348, ASTM F67, ASTM F136SpecificationDiameter: ... started with producing ingot by advanced vacuum melting process. The wire production includes forging, rolling, annealing and drawing. From the ... ingot to the final thin wire, manufacture process is operated with high standard quality control system ...