ASTM A200 Standard for Seamless Alloy Steel Tube

ASTM A200 covers several grades of minimum wall thickness (mw), chromium-molybdeum and chromium-molybdenum-silicon, seamless, hot-finished and cold-finished,intermediate alloy steel tube, for use in carrying fluids at elevated temperaure and presure in various types of heaters, in which the tubes may be subjected to a furnace temperature higher than that of the contained fluid.

This specification covers tubes 2 to 9 in., (50.8 to 228.6 mm) inclusive, in outside diameter and over 0.220 in. (5.59 mm)in minimum wall thickness.

Where butt welding is used to obtain length longer than single length normally produced in the mill, Specification ASTM A422 shall cover the requirements for butt welds.

The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. With Drawn, Replace by ASTM A213