China Grade:TA1,TA2,TA3,TA4,TC4,TA9,TA18,TA23. America Grade:Gr1,Gr2,Gr3,Gr4,Gr5,Gr7,Gr9,Gr12. China Standard:GB/T 16598. Americal Standard ASTM B381. size:outdiameter(200-1500mm),indiameter(60-1200mm),higt(20-700mm). Delivery status:annealing stateï¼?Mï¼?,hot processing stateï¼?R ,cold processing state. Apply:Medical, aviation, military, petrochemical, metallurgy, electroplating, shipbuilding, mechanical equipment, petroleum equipment and other industries.