Standard Speciﬁcation for Hot-Formed Welded and Seamless Carbon Steel Structural Tubing1

This popular is issued underneath the ﬁxed designation a 501; the range straight away following the designation shows the year of original adoption or, in the case of revision, the yr of last revision. A number of in parentheses shows the year of final reapproval. A superscript epsilon (e) shows an article alternate because of the ultimate revision or reapproval.
This trend has been accepted for use via agencies of the department of defense