scope:

These specifications cover wrought iron² crane chain generally used for slings, cranes, steam shovels, and marine uses, and when an all wrought iron chain is desired.

² Wrought iron is defined as follows in the Definitions of Terms Relating to Wrought Iron (ASTM Designation: A 81):

Wrought Iron-A. ferrous material, aggregated from a solidifying mass of pasty particles of highly refined metallic iron with which, without subsequent fusion, is incorporated a minutely and uniformly distributed quantity of slag.