... are produced based on the international standard, including ASTM B348,ASME SB348,ASTM B265,MIL-7-9046,MIL-7-9047,AMS 4928 ... markets through the world.Grade: GR1,GR2,GR3,GR5,GR9Standard: ASTM B381Size:Based on the customers' requirementsOur factory,plants and products ...