Main Grades: S32205 Production Standard:ASTM A312 ASTM A312... O.D.:10-352mm ... /L/Ti,TP317/L,TP321/H,TP347H,TP310S;UNS S31803,S32205,S32750,S32760...Production Standard:ASTM A312ASTM A789GB/T 12771-2000 ... brand by advanced technology and senior management mode. Marine Tube S32205