High pressure cylinders seamless pipe:
Size series: 406, 559, 610, 660 and so on.
Typical tube standard: ASTM A519, ASTM SA372, ISO 11120, GB 18248 Typical steel grade: 4130X, 4140, 34CrMo4, 42CrMo4, 34Mn2V, 30CrMo, 35CrMo, 45# and so on.
Applicaiton: Material used for making all kinds of high or middle pressure gas cylinders.
